Critical Power
Product Manual
827E
Modular Inverter System
−48 V / +24 V Input
120 Vac / 240 Vac Output
Service and Assistance - +1 877 546 3243 or +1 972 244 9288
© 2013 General Electric Company. All rights reserved.
4380419PD
Issue 33 April 2013
PE.TechSupport@ge.com
http://www.ge.com/powerelectronics
1
827E Modular Inverter System ProductManual
Table of Contents
List of Figures ........................................................................................................................................................................................................................... 4
List of Tables ............................................................................................................................................................................................................................. 5
Foreword .................................................................................................................................................................................................................................... 6
Product Information ............................................................................................................................................................................................................. 7
Product Description .............................................................................................................................................................................................................. 8
Installation .............................................................................................................................................................................................................................. 15
Mechanical Installation .......................................................................................................................................................................................... 16
General .................................................................................................................................................................................................................. 16
Shelf Mounting ................................................................................................................................................................................................... 16
Electrical Connections ............................................................................................................................................................................................. 18
General .................................................................................................................................................................................................................. 18
DC Input ................................................................................................................................................................................................................. 19
AC Output ............................................................................................................................................................................................................. 21
Grounding Electrode Conductor Connections - GEC..................................................................................................................... 23
Alarm Connections .......................................................................................................................................................................................... 24
Communication Connections .................................................................................................................................................................... 26
Inverter - Install / Remove..................................................................................................................................................................................... 28
System Controller - Install / Remove ............................................................................................................................................................... 29
Modem - Install / Remove ..................................................................................................................................................................................... 30
Distribution Monitor - Install / Remove .......................................................................................................................................................... 31
Distribution Disconnect Module - Install / Remove ................................................................................................................................. 32
Initial Turn On, Setpoints, and Adjustments ................................................................................................................................................ 33
Shelf Turn On and Operational Checkout............................................................................................................................................ 33
Adjusting Setpoints.......................................................................................................................................................................................... 35
Specifications ........................................................................................................................................................................................................................ 37
Features Reference ............................................................................................................................................................................................................ 40
AC Output Distribution ............................................................................................................................................................................................ 40
Inverter ............................................................................................................................................................................................................................ 40
Distribution Disconnect Module (DDM)........................................................................................................................................................... 40
Distribution Monitor (DM) ....................................................................................................................................................................................... 41
System Controller ...................................................................................................................................................................................................... 41
Display Navigation and Push Buttons ................................................................................................................................................... 43
Display Menus .................................................................................................................................................................................................... 44
Theory of Operation ........................................................................................................................................................................................................... 55
Output Protection ...................................................................................................................................................................................................... 55
Output Paralleling and Hot Insertion .............................................................................................................................................................. 57
Considerations for Multiple-Shelf Systems .................................................................................................................................................. 58
Troubleshooting ................................................................................................................................................................................................................... 59
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827E Modular Inverter System ProductManual
Safety......................................................................................................................................................................................................................................... 66
Safety Statements ..................................................................................................................................................................................................... 66
Warning Statements and Safety Symbols ................................................................................................................................................... 67
Precautions ................................................................................................................................................................................................................... 68
Revision History.................................................................................................................................................................................................................... 69
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List of Figures
Figure 1 19-inch and 23-inch Systems and Shelves ........................................................................................................................................ 11
Figure 2 Modules Front View......................................................................................................................................................................................... 12
Figure 3 120 Vac & 240 Vac Module Identification ........................................................................................................................................... 13
Figure 4 Side Views of a System (Shelf) ................................................................................................................................................................... 14
Figure 5 Mounting - 23”, 25”, and 26” ...................................................................................................................................................................... 17
Figure 6 AC Wiring - without Maintenance Bypass Panel ............................................................................................................................. 18
Figure 7 AC Wiring - with Maintenance Bypass Panel .................................................................................................................................... 19
Figure 8 Shelf Rear View .................................................................................................................................................................................................. 20
Figure 9 DC Input Connections .................................................................................................................................................................................... 20
Figure 10 AC Output Connections .............................................................................................................................................................................. 21
Figure 11 Common Trip Ratings for 10 – 30 Amp Range .............................................................................................................................. 23
Figure 12 Grounding Electrode Conductor (GEC) Connections .................................................................................................................. 24
Figure 13 Alarm Outputs ................................................................................................................................................................................................. 26
Figure 14 DB9 Pin-out....................................................................................................................................................................................................... 27
Figure 15 Inverter Install / Remove ........................................................................................................................................................................... 28
Figure 16 System controller Removal/Installation ............................................................................................................................................ 29
Figure 17 Modem Installation ....................................................................................................................................................................................... 30
Figure 18 Distribution Monitor/Distribution Disconnect Module Removal and Installation........................................................ 31
Figure 19 Controller Pushbuttons .............................................................................................................................................................................. 43
Figure 20 Menu Structure - Typical ........................................................................................................................................................................... 54
Figure 21 Output Protection, Short Circuit with no Fuse ................................................................................................................................ 56
Figure 22 Output Protection - Short Circuit with Fuse .................................................................................................................................... 56
Figure 23 Paralleling and Hot Insertion ................................................................................................................................................................... 57
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List of Tables
Table 1 System Configurations ....................................................................................................................................................................................... 9
Table 2 wire and terminals for Individual DC inputs (+BAT and −BAT) .................................................................................................... 20
Table 3 Recommended Wire and Terminals for AC Output ......................................................................................................................... 21
Table 4 Typical Trip Ratings for 10 – 30 Amp AC Circuit Breakers ............................................................................................................ 22
Table 5 Grounding Electrode Conductor Connections - GEC ...................................................................................................................... 24
Table 6 Alarm Outputs...................................................................................................................................................................................................... 25
Table 7 Inverter Shelf Interface Cable Connection ........................................................................................................................................... 27
Table 8 Setpoint Resolution ........................................................................................................................................................................................... 36
Table 9 Specifications - Inverter.................................................................................................................................................................................. 37
Table 10 Specifications - Inverter System ............................................................................................................................................................ 38
Table 11 Troubleshooting - Alarm Conditions ..................................................................................................................................................... 60
Table 12 Troubleshooting - Corrective Actions ................................................................................................................................................... 61
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827E Modular Inverter System ProductManual
Foreword
This manual is intended to help the user of the 827E to install, test, troubleshoot, and understand the system. If you
have any questions or problems, please contact one of the following sources:
SERVICE
If for any reason further assistance is needed on any power equipment, complete engineering and field
service groups are available in Galion, Ohio, to assist you in any way possible.
CALL: 1-877-546-3243, Option 2
PARTS ORDERING
Replacement parts for power equipment may be obtained by forwarding a Purchase Order to:
GE
1376 State Route 598
Galion, Ohio 44833
OR
Fax to: 419.468.9780
Include the following information:
A. GE part number and engineering level of equipment
B. If part is electrical, give circuit reference numbers and GE part numbers.
C. If part is mechanical in nature, give description as to where it is used.
RETURN & REPAIR - Equipment may be returned to the Factory for repair. In order to do this, the procedure must be as
follows:
A. Call: +1 972 244 WATT (9288) or toll-free at 888-LINEAGE (546-3243)
B. Request a Returned Material Authorization (RMA) number for the defective equipment.
C. Return material prepaid to:
GE
1376 State Route 598
Galion, Ohio 44833
Attn: RS & R Dept
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827E Modular Inverter System ProductManual
Product Information
Please take a moment when the product is new to fill in this information. This data will allow faster service when calling
GE to order accessories, spare parts, or request field service.
First, locate the product information label. This is typically located on the upper front of the equipment frame, or on the
rear of the frame. Fill in the part number, as it appears on the label, in the space below.
PART NUMBER
SERIAL NUMBER
DATE CODE
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Product Description
The 827E Inverter System (inverter system) provides AC power output from DC power input. Inverters (inverter modules)
work in parallel supporting redundancy (N + 1 or N + X). This enables the system to supply uninterrupted AC power in the
event that an inverter fails.
Summary
•
120 Vac and 240 Vac systems
•
Line to Neutral systems
•
Inverter Systems
•
Single Shelf Inverter Systems to 7.2 kVA
19”, 23”, 25”, and 26” rack compatible
•
Frame Inverter Systems to 28.8 kVA
•
Expandable by Inverter and Shelf addition
•
Hot Insertion Inverters
•
AC Output Distribution Panels - Option
•
Maintenance Bypass Panel - Option
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System Configurations
Inverter systems are available as single shelf systems or frame systems.
Single shelf systems provide basic inverter system features and mount in an existing frame.
Frame Systems (−48 Vdc input only) provide up to four inverter shelves and optional Maintenance Bypass Panel
and AC Distribution Panels factory assembled in a 23” frame (rack).
Table 1 System Configurations
Mounting
19”
23”
Inverter
Positions
Single Shelf Systems - typical 1
Input
−48 Vdc
+24 Vdc
•
4
•
•
4
•
•
4
Inverter
Shelves
1
2
3
4
•
•
6
•
•
6
•
•
6
•
Output Capacity 2
N+1 (full)
120 Vac
30A
3.6 kVA
(40A
4.8 kVA)
240 Vac
15A
3.6 kVA
(20A
4.8 kVA)
120 Vac
15A
1.8 kVA
(20A
2.4 kVA)
120 Vac
50A
6.0 kVA
(60A
7.2 kVA)
240 Vac
25A
6.0 kVA
(30A
7.2 kVA)
120 Vac
25A
3.0 kVA
(30A
3.6 kVA)
Frame Systems - −48 Vdc Input, 23” Only - typical1
Inverter
Output Capacity2
Output Capacity2
Positions
120 Vac System N+1 (full)
240 Vac System N+1 (full)
50A
6.0 kVA
25A
6.0 kVA
6
(60A
7.2 kVA)
(30A
7.2 kVA)
110A
13.2 kVA
55A
13.2 kVA
12
(120A
14.4 kVA)
(60A
14.4 kVA)
170A
20.4 kVA
85A
20.4 kVA
18
(180A
21.6 kVA)
(90A
21.6 kVA)
230A
27.6 kVA
115A
27.6 kVA
24
(240A
28.8 kVA)
(120A
28.8 kVA)
Inverters
Inverters are microprocessor controlled and have no adjustments. Each inverter can be inserted or removed from
an energized shelf without shutting down the system (hot swappable).
The inverter system includes several alarm indicators, located on the individual inverters, the System Controller, and
the Distribution Disconnect Module. Refer to the Features Reference section for a detailed description of all alarms.
SI10A120PME
SI5A240PME
SI5A120PME
Inverter
J438827E L11
J438827E L17
J438827E L14
Input
−48 Vdc
−48 Vdc
+24 Vdc
120 Vac
240 Vac
120 Vac
Output Capacity
10A
1.2 kVA
5A
1.2 kVA
5A
0.6 kVA
1
See the Ordering Guide for available configurations.
2
N+1 output: a system fully populated with inverters where the output of a single redundant inverter is not included.
full output: a system fully populated with inverters where the output all inverters is included.
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Shelves
Each shelf must include a System Controller, a Distribution Disconnect Module (DDM), and at least one Inverter.
Shelves are available for 120 Vac and 240 Vac. Shelves and inverters are keyed. 120 Vac inverters will only fully
insert into 120 Vac shelves. 240 Vac inverters will only fully insert into 120 Vac shelves.
Input to each inverter position is wired separately via individual DC input lugs. Only the positions in the shelf
being utilized need to be wired by installers. Refer to T-439827E at the included with this manual. For more
information, refer to the DC Input section.
Shelf – with Controller and DDM
657827E-23
J438827E L3
657827E-3
J438827E L4
150026249
J438827E L3A
150026250
J438827E L4A
657827E-2324
J438827E L9
657827E-1924
J438827E L8
Input
−48 Vdc
−48 Vdc
−48 Vdc
−48 Vdc
+24 Vdc
+24 Vdc
Mounting
23”
19”
23”
19”
23”
19”
Output Capacity (maximum N+1) 3
120 Vac
10A
1.2 kVA
120 Vac
10A
1.2 kVA
240 Vac
5A
1.2 kVA
240 Vac
5A
1.2 kVA
120 Vac
5A
0.6 kVA
120 Vac
5A
0.6 kVA
System Controller
The System Controller, located in the far left slot of each inverter shelf, allows the user to monitor real-time system
operation such as plant voltage and plant current, and also allows system setpoints for parameters, such as alarm
thresholds, to quickly be changed with the touch of a few buttons. Real-time readings may be viewed for both; the
system and each individual inverter.
System Controllers in each shelf are independent.
Refer to the System Controller segment in the Features Reference section.
Distribution Disconnect Module (DDM)
The Distribution Disconnect Module (DDM), located to the right of the System Controller, provides an AC disconnect
and shelf distribution monitoring via the Distribution Monitor (DM). The AC disconnect is a circuit breaker that
provides overload protection and fault isolation. The DDM works with the System Controller to monitor shelf
operation.
Maintenance Bypass Panel (MBP)
A maintenance bypass panel is optional for the 827E. Refer to the J-Drawing (J438827E L51 and L52). The main
purpose of the MBP is to allow an AC load to be switched from its primary source (827E Inverter Plant) to an
alternate source (AC Line) and back to the primary source (827E Inverter Plant) again. This may be required, for
example, when doing maintenance or upgrades to the Inverter Plant.
L51 and L52 MBPs provide mechanical bypass via contactors.
The MBP includes alarm aggregation of alarm signals from 1 to 4 shelves. The MBP provides integrated alarm
signals from a multi-shelf, frame system by combining alarm signals from individual shelf System Controllers.
3
N+1 output: a shelf fully populated with inverters where the output of a single redundant inverter is not included.
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System Controller Module
Distribution Disconnect
Module
SC00
DM15
01
Inverters
a. 19-Inch System
02
03
04
05
06
Module Designations
b. 23-Inch System
Figure 1 19-inch and 23-inch Systems and Shelves
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827E Modular Inverter System ProductManual
System
Inverter
Controller
LCD Display
827E
SYSTEM INTERFACE
LEDs
Fans
Control
Buttons
Serial Port
Modem
Option
Handle
Retaining
Screw
Distribution
Disconnect
Module
Distribution
Monitor
LED
AC Load Disconnect Breaker
100A
Figure 2 Modules Front View
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240 Vac
120 Vac
Inverter
Inverter
Figure 3 120 Vac & 240 Vac Module Identification
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Connector Pin-Out
Alarm Relay
Output
Connector
AC Opening
Left Side View
DC Opening for
1 1/2" conduit
Right Side View
Product Information:
part number,
serial number,
revision level,
voltages, etc.
Figure 4 Side Views of a System (Shelf)
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827E Modular Inverter System ProductManual
Installation
Equipment Included In Shipment
Included in a shipment of an 827E inverter system are an inverter shelf or shelves (each equipped with a System
Controller and a Distribution Disconnect Module) and inverters and/or blank panels - quantities as specified on the
inverter system order.
CAUTION:
Loads and Inverters may be damaged if their AC voltages are not matched.
Shelves and Inverters are available for both 120 Vac and 240 Vac applications.
CAUTION:
Inverters may be damaged or may not function properly with improper DC input voltage.
Shelves and Inverters are available for both −48 Vdc and +24 Vdc applications.
Verify equipment received before installing the inverter system
•
Verify product received matches the order
•
Verify the correct inverter input voltage and output voltage
•
Verify the correct shelf / system input voltage and output voltage
Contact GE immediately if there is a question about the configuration of the system.
Tools and Test Equipment Required
The tools necessary to install and test the inverter system include items such as a typical Phillips head screwdriver,
torque wrenches, a ratcheting wrench set, wire cutters, a calibrated digital multi-meter, wire crimp tool and die set,
etc. No unusual tools are required.
CAUTION:
Read this manual thoroughly before attempting to connect, operate, or service an inverter system. Pay
particular attention to these sections:
•
Safety
•
Considerations for Multiple-Shelf Systems
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827E Modular Inverter System ProductManual
Mechanical Installation
General
This section details all of the information that is necessary to mechanically install the system. Complete mechanical
installation before any electrical connections are made to the system. The inverter system may be rack or pedestal
mounted.
Shelf Mounting
Refer To Figure 5.
NOTE: The DC power plant supplying input circuits to the inverter system must be wired as stated in Telcordia
document GR-1089-CORE, section 9.8.3, Isolated DC return technique. The power plant must have a
dedicated grounding conductor from the power plant common DC return bus to the Central Office Ground
Bar.
This dedicated grounding conductor must not be bonded to or used as the frame ground cable. A separate
connection to the Central Office Ground System must be used for frame grounding purposes.
NOTE: List 8 system comes equipped with an adaptor plate for 19” to 23” mounting.
NOTE: Optional 25” and 26” mounting kits are available for 23” shelves - J438827E List 5 and List 6 respectively.
Refer to Figure 5 for mounting dimensions.
Once the system has been removed from the shipping container:
•
Verify that the input DC voltage matches the shelves and inverters:
+24 Vdc (+27 Vdc nominal) or −48 Vdc (−54 Vdc nominal).
•
Verify that AC voltage matches across inverters, shelves, and loads.
•
Install the system as follows:
•
1.
Move the mounting brackets as required
2.
Ensure there is proper clearance in the rack or shelf to install the system.
3.
Put the system into position and secure with the screws located at each outside corner (four
screws total).
4.
Repeat steps 1 thru 3 for additional shelves, as required.
Verify the input source.
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827E Modular Inverter System ProductManual
a. Mounting (typical 23-inch shelf shown)
The height between mounting holes for a 19-inch shelf is the same, however the
width between holes is 18.31")
b. Optional 25” Mounting Brackets (Refer to List 5 in 438827E)
c. Optional 26” Mounting Brackets (Refer to List 6 in 438827E)
Figure 5 Mounting - 23”, 25”, and 26”
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827E Modular Inverter System ProductManual
Electrical Connections
General
This section details all of the electrical connections involved when installing the inverter system. Complete all
mechanical installation instructions (refer to the Mechanical Installation section) before making any electrical
connections.
Figure 6 and Figure 7 are basic wiring diagrams showing typical connections with and without the maintenance
bypass panel. Refer to the T-Drawing (438827ET) for complete details.
Grounding Electrode Conductor (GEC)
GEC Neutral
Strap
First shelf only
Grounding
Electrode
Conductor (GEC)
Connection
First shelf only
Figure 6 AC Wiring - without Maintenance Bypass Panel
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827E Modular Inverter System ProductManual
Figure 7 AC Wiring - with Maintenance Bypass Panel
DC Input
Refer to Figure 9.
Note:
Each input must be fed by a customer supplied 40 amp circuit breaker.
Be sure that all power is turned off before any installation steps are performed.
1.
Turn OFF all DC feed circuit breakers (customer supplied, 40A minimum per fully loaded module is required).
2.
Refer to Table 2 for recommended wire and terminal sizes for DC connections.
3.
Remove rear cover.
4.
Remove a conduit knockout from the left side of the plant (as facing the rear of plant) (one is on the back of the
plant, one is on the left, and one is on the bottom). A 2” access hole is provided. Size and install conduit (not
included) for the input wiring in accordance with local code. The bushing for the opening is included in a bag
attached to the system.
5.
Attach +BAT cables to +BAT Terminal on individual inverter backplanes via a 1/4" on 5/8” two-hole lug (one
connection per module). Refer to Figure 8 and Figure 9 for +BAT input location. Refer to Table 2 for more
details.
6.
Attach −BAT cables to −BAT Terminals on individual inverter backplanes via a 1/4" on 5/8” two-hole lug (one
connection per module). Refer to Figure 8 and Figure 9 for −BAT input location. Refer to Table 2 for more
details.
7.
When the 827E is installed using the maintenance bypass switch and NOT as a Separately Derived System the
GEC Neutral Bond Strap as depicted in Figure 12 must be removed. Refer to NEC Article 100 for definition of a
Separately Derived system. This assumes that the utility neutral connection is bonded to ground. See the
Grounding Electrode Conductor Connections section and Figure 12.
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827E Modular Inverter System ProductManual
Table 2 wire and terminals for Individual DC inputs (+BAT and −BAT)
Shelf
Connection
Terminal Type 4
Recommended Wire Size
all
−BAT & +BAT
1/4" on 5/8” two-hole lug
8 AWG per connection
Figure 8 Shelf Rear View
+BAT
−BAT
Figure 9 DC Input Connections
4
+BAT
−BAT
+24 Vdc Input System
+24 Vdc
Ground
−48 Vdc Input System
Ground
−48 Vdc
Lugs not provided.
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827E Modular Inverter System ProductManual
AC Output
Refer to Figure 10.
1.
Rear cover should already be removed from installing the DC input.
2.
Make sure AC Load Disconnect Breaker is "OFF" (located on the Distribution Disconnect Module).
3.
Remove a conduit knockout from the right side of the plant (as facing the rear of the plant) (there are two
openings; one on the back right and one on the bottom right). If wiring to an MBS or AC distribution panel, use
the wire-way.
4.
Refer to Table 3 for recommended wire and terminal sizes for connecting the AC outputs.
5.
Connect the AC outputs via the terminal block located near the bottom right corner on the rear of the system.
Table 3 Recommended Wire and Terminals for AC Output
Terminal Amperage
Terminal Type
or Stud Size
1/4" Screw Terminal
Compression
Recommended
Wire Size
Over Current
Protection (Located
in Distribution
Monitor)
Conduit
6 AWG
100A CB for 19-inch
system or 100A CB for
23-inch system
1"
(Term Block rated for
85 amps)
6.
Size
Replace rear cover.
Conduit Openings
for AC Output
AC Output
Terminal Block
Figure 10 AC Output Connections
The modular nature of the system allows individual inverters to work in parallel (load share). By calculating the actual
load and adding 1 additional inverter the system will be configured for “N+1” redundancy, adding a second would be
N+2, etc. When configured in this fashion, if an inverter fails, the system will not go into current limit. It will seamlessly
continue to supply the needed power.
Example with 10 Aac Inverters:
Power output needed = 100 amps = 10 x –48 Vdc 10 Aac inverters
N + 1 = 11
N = 10
Install 11 x –48 Vdc 10A inverters for N+1 redundancy.
Example with 5 Aac Inverters:
Power output needed = 25 amps = 5 x +24 Vdc 5 Aac inverters
N+1=6
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N=5
Install 6 x +24 Vdc 5 Aac inverters.
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827E Modular Inverter System ProductManual
NOTE: The LINE and NEUTRAL of all shelves in a multiple-shelf system must be connected together in an AC
distribution panel or optional maintenance bypass panel (refer to J-Drawing 438827E List number 51 and
52).
NOTE: The inverter’s output protection will shutdown the inverter output after 5 seconds under short circuit or
deep overload conditions. Therefore, the response time of the breaker must allow the breaker to trip within
(4) seconds with a short circuit current of 28A per inverter. Both the circuit breaker rating and number of
inverters equipped in the system must be taken into account to insure that the circuit breaker trips in the
desired timeframe. If faster response times are desired, e.g. below the AC holdup time of the AC equipment,
then the trip time must be decreased by lowering trip rating of the breaker, and/or increasing the number
of modules equipping the system.
Table 4 shows typical trip times of commercially available AC distribution circuit breakers. The table lists “min-max” trip
times based on most common circuit breaker ratings vs. number of equipped −48 V inverters in the system. The
maximum rating must be used to guarantee tripping within a specific time. For special situations where commercial AC
breakers do not meet the required trip times, contact technical support for other options.
Table 4 Typical Trip Ratings for 10 – 30 Amp AC Circuit Breakers
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22
* Circuit breaker rating not recommended for this number of inverters equipped
5
150
5
16.67
5
16.67
5
16.67
5
672
24
300
5
175
5
16.67
5
16.67
5
16.67
644
23
5
325
5
200
5
16.67
5
16.67
5
16.67
616
22
5
350
5
215
5
16.67
5
16.67
5
16.67
588
21
5
375
5
225
5
16.67
5
16.67
5
16.67
560
20
5
400
5
250
5
16.67
5
16.67
5
16.67
532
19
5
450
5
275
5
16.67
5
16.67
5
16.67
504
18
5
500
5
300
5
16.67
5
16.67
5
16.67
476
17
5
550
5
350
5
16.67
5
16.67
5
16.67
448
16
5
600
5
375
5
16.67
5
16.67
5
16.67
420
15
5
700
5
425
5
16.67
5
16.67
5
16.67
392
14
5
800
5
450
5
16.67
5
16.75
5
16.67
364
13
5
1000
5
500
5
16.67
5
17.00
5
16.67
336
12
5
1200
5
600
5
16.67
5
17.50
5
17.00
308
11
5
1300
200
700
5
17.00
5
18.00
5
17.50
280
10
5
1700
300
850
5
18.00
5
20.00
5
18.00
252
9
5
2250
475
1000
60
400
5
300
5
300
224
8
5
2800
600
1300
250
600
5
600
5
450
196
7
5
4000
1000
1800
400
900
5
800
5
700
168
6
5
5500*
1300*
2500
600
1600
5
1100
5
800
140
5
5
9000*
2250*
3700
900
2800
400
1600
5
1300
112
4
5
20000*
4500*
7000*
1700*
5000*
1250*
3000
700
2000
400
84
3
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Current (A)
Number
of −48 V
Inverters
Avail. Trip
10 A Trip Time
(msec.)
15 A Trip Time
(msec.)
20 A Trip Time
(msec.)
25 A Trip Time
(msec.)
30 A Trip Time
(msec.)
Based on Square-D, QO Series
827E Modular Inverter System ProductManual
Figure 11 Common Trip Ratings for 10 – 30 Amp Range
Grounding Electrode Conductor Connections - GEC
A Grounding Electrode Conductor (GEC) bonded to the neutral is required where an AC source is originated (a separately
derived source). This provides a continuous AC fault clearing path to ground. This is not an equipment ground.
Associated terminology:
AC Equipment Ground Conductor (ACEG) or
continuous “Green wire ground”
Determining connections for your configuration: There are several contributing documents to consider when
bonding a GEC to the 827E converter system: Customer specific standards, state and local codes, and Article 250 from
the NEC are primary sources. Customer specific installation publications may also address differences in inverter
installations in Isolated Ground Plane and Integrated Ground Plane environments. There are various technical
publications including Telcordia documents TR-NWT-000295, GR-1089-Core and GR-1502-CORE that are also frequently
consulted for Central Office application installations in both ground planes.
Separately Derived System: NEC, Article 100 defines a separately derived system as follows: “A premises wiring system
whose power is derived from a battery, from a solar photovoltaic system, or from a generator, transformer, or converter
windings, and has no direct electrical connection, including a solidly connected grounded circuit conductor, to supply
energy from the serving utility to the wiring system of the premises served”.
Inverter systems without Maintenance Bypass Switches are separately derived systems.
Inverter systems with Maintenance Bypass Switches are not separately derived systems.
Customer specific technical publications may also include a section defining similar systems that vary slightly.
Generally, these publications do not differ significantly. However, customer specific installation publications and state
and local codes can take precedence.
Note
Customer specific standards for installations in the isolated ground plane can vary greatly from customer to
customer. These standards must be researched completely prior to installation start.
This manual addresses the most common installations in an integrated ground plane.
Figure 6 depicts typical wiring for the inverter system wired as a separately derived system without the maintenance
bypass switch (MBS).
Figure 7 depicts typical wiring for the inverter system wired using the MBS, not as a separately derived system.
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Note
AC neutral and AG Ground extend continuously through the circuit from the source to the load in both Figure 6
and Figure 7.
Note
Other wiring configurations can be employed without effecting the system warrantee as long as the chosen
configurations does not directly violate any NEC or state and local code requirements.
Equipment Ground cable sizing: Equipment grounding conductor size must be based on the recommendations of the
NEC Article 250-94 for copper wire. State and local codes or customer specific requirements can take precedence.
GEC cable sizing: Table 5 is derived from National Electric Code (NEC) Article 250-95 for proper cable sizing
requirements for externally run cables. State and local codes or customer specific requirements can take precedence.
Table 5 Grounding Electrode Conductor Connections - GEC
Terminal Type
Recommended Wire Size
1/4"on 5/8” two-hole lug
6 AWG. or as required
see note above
Ground Electrode (GEC) Connection Studs
GEC Neutral Bond Strap
Figure 12 Grounding Electrode Conductor (GEC) Connections
Alarm Connections
All internal system alarms are connected at the factory and report to the System Controller. Relays are available if the
alarms need to be extended to the office monitoring equipment. A DB25 female connector is supplied for this purpose. It
is located on the left side of the system when viewed from the front (Refer to Figure 13). Connector pin out, wire color,
and contact functionality is given in Table 6. Pin-out is also displayed next to the connector on the system.
Alarm output cabling is available as an option. Order Part Number 6370213P-X, where X is the length of the cable; see
the J-drawing.
Note: In accordance with safety agency approval of this product, when connecting the plant alarm interface, do not
exceed NEC CLASS II for connections.
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Table 6 Alarm Outputs
Terminal Type
Recommended Wire Size
DB25 female (gold)
22 GA
Pin
Type 5
Description
Wire Color 6
Function
Connection
to Combine
Signals 7
13
MAJ
NC (K1, relay 1)
Black/Orange
Close on Alarm
Parallel
25
MAJ
COM (K1, relay 1)
Orange/Black
Common K1-1
12
MAJ
NO (K1, relay 1)
Black/Blue
Open on Alarm
Series
23
MAJ
NC (K1, relay 2)
Slate/Red
Close on Alarm
Parallel
11
MAJ
COM (K1, relay 2)
Red/Slate
Common K1-2
24
MAJ
NO (K1, relay 2)
Blue/Black
Open on Alarm
Series
10
MIN
NC (K2, relay 1)
Red/Brown
Open on Alarm
Series
22
MIN
COM (K2, relay 1)
Brown/Red
Common K2-1
9
MIN
NO (K2, relay 1)
Red/Green
Close on Alarm
Parallel
20
MIN
NC (K2, relay 2)
Orange/Red
Open on Alarm
Series
8
MIN
COM (K2, relay 2)
Red/Orange
Common K2-2
21
MIN
NO (K2, relay 2)
Green/Red
Close on Alarm
Parallel
17
Plant Load
NC (K3, relay 1)
Brown/White
Open on Alarm
Series
5
Plant Load
COM (K3, relay 1)
White/Brown
Common K3-1
18
Plant Load
NO (K3, relay 1)
Slate/White
Closed on Alarm
Parallel
7
Plant Load
NC (K3, relay 2)
Red/Blue
Open on Alarm
Series
19
Plant Load
COM (K3, relay 2)
Blue/Red
Common K3-2
6
Plant Load
NO (K3, relay 2)
White/Slate
Closed on Alarm
Parallel
14
K4B spare
NC (K4, relay 1)
Blue/White
Open on Alarm
Series
2
K4B spare
COM (K4, relay 1)
White/Blue
Common K4-1
15
K4B spare
NO (K4, relay 1)
Orange/White
Closed on Alarm
Parallel
NC (K4, relay 2)
White/Green
Open on Alarm
Series
4
K4C spare
16
K4C spare
COM (K4, relay 2)
Green/White
Common K4-2
3
K4C spare
NO (K4, relay 2)
White/Orange
Closed on Alarm
Note:
Parallel
MAJ alarm relay (K1) coil is DE-ENERGIZED on alarm. All other alarm relay coils are ENERGIZED on alarm.
Therefore, when the controller is unpowered, MAJ is asserted and all other alarms are not asserted.
5
MAJ = Plant Major, MIN = Plant Minor
6
Alarm Cables J438827E L25 – L32
7
When combining signals of multiple shelf systems, wire
Open on Alarm signals in series and
Close on Alarm signals in parallel.
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DB25 Alarm
Output Connector
Figure 13 Alarm Outputs
Alarm Connections - Multiple Shelf Systems
Each shelf is equipped with a DB-25 connector for its alarm outputs. These alarm outputs may be independently
utilized or the alarm outputs of more than one shelf may be combined. Refer to Table 6.
Optional Maintenance Bypass Panel includes connections and circuitry to aggregate alarm signals from multiple
shelves.
Expansion of multiple minor alarms to create a major alarm is not possible through simple wiring and will require a
separate alarm-centralization module. Contact service if this is desired.
Communication Connections
A.
Serial Interface: A 9-pin serial interface is provided on the front panel that allows connection to the serial port
on a PC. Communication to the System controller is then through the Envision software.
NOTE: Connection to a PC requires a PC data transfer (null) cable. This serial interface complies with the PC/AT
standard. Recommended Interface Cables are:
GE: P/N 6370189P-1 (This cable is included with kit 6820014P).
Radio Shack: P/N 26-152, 9-pin Female to 9-pin Female Cable used with P/N 26-264, 9-pin Null adapter
Staples: P/N F3x171-10 (Belkin) Serial Data Cable
If a cable cannot be obtained from one of the above sources, it may be fabricated. A pin out of the Serial
interface pin out and recommended wire size are shown in Figure 14 and Table 7.
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Table 7 Inverter Shelf Interface Cable Connection
Terminal Capacity
Terminal Type
Recommended Wire Size
20 GA Maximum
DB9 Male (gold)
22 GA
PIN
FUNCTION
I/O
DESCRIPTION
1
DCD
I
Carrier Detect
(Unused)
2
RXD
I
Receive Data
3
TXD
O
Transmit Data
4
DTR
O
Data Terminal Ready
5
GND
-
System Ground
6
DSR
I
Data Set Ready
7
RTS
O
Request to Send
8
CTS
I
Clear to Send
(Unused)
9
RI
I
Ring Indicator
(Unused)
(Unused)
(Unused)
1    5
6   9
Figure 14 DB9 Pin-out
B.
Telephone/Modem Connection: A standard RJ-11 modular phone jack is mounted on the front panel of the
System controller. Installation of the modem is optional. If the modem is equipped and a phone line is
connected, the Envision Software (827 MODBUS) may be used to remotely access the shelf.
Each System Controller must be modem equipped to provide remote access in multi-shelf systems.
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Inverter - Install / Remove
The inverter system is modular in design, which allows components to be easily removed or installed while the system is
operating without interrupting power delivered to the load.
Install Inverter (Refer to Figure 15:
1.
When adding a new inverter, remove the blank panel where the new inverter will be inserted, and set it
aside.
2.
Firmly insert the inverter into the shelf.
3.
Push firmly on the front of the module until it is against the face of the shelf.
4.
Secure the module to the shelf with the retaining screw.
5.
Each of the LEDs on the inverter will briefly cycle ON then OFF followed by a solid ON state of the amber
“Standby” LED for several seconds. Next the Standby LED will turn OFF followed by the green “OK” LED
turning ON. There should be no Alarms on the System controller.
Pull to remove / install
module
Loosen/tighten retaining
screw
Figure 15 Inverter Install / Remove
Remove Inverter (Refer to Figure 15):
1.
Loosen the retaining screw.
2.
Remove the module from the shelf.
3.
If returning the inverter to the shop or GE for repair, place the module in an ESD bag, then in a small box to
protect the module during shipping and handling.
4.
Install a blank panel or proceed to Install Inverter step 3 for installation of a new inverter.
Inverter positions must not be unoccupied to avoid hazardous voltage exposure.
Note: Do not reinsert the module until all front panel LEDs have gone dark.
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System Controller - Install / Remove
The System Controller may be removed or installed while the system is operating without interrupting power delivered
to the load.
Install System Controller (Refer to Figure 16):
1.
Insert the System Controller into the leftmost shelf position.
2.
Push lightly on the front of the module until it is against face of the shelf.
3.
Tighten retaining screw.
4.
When installation is complete, the controller will reinitialize as described in steps 6, 7, and 8 of the
Operational Checkout Routine found in the Shelf Turn On and Operational Checkout section.
Pull to remove / install
module
Loosen/tighten retaining
screw
Figure 16 System controller Removal/Installation
Remove System Controller (Refer to Figure 16:
1.
Loosen retaining screw.
2.
Slowly remove System Controller module from the shelf until it is ¾ of the way out.
3.
Protect System Controller with static sensitive protective material.
Note: Removing the controller will not interrupt the operation of the system.
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Modem - Install / Remove
Install Modem (Refer to Figure 17):
1.
Remove the System Controller from the shelf per the System Controller - Install / Remove section.
2.
Insert the modem into position and push lightly until the modem is completely plugged into position. Refer
to Figure 17.
Modem plugs
into this
connector.
a. Location of Modem Connector
b. Location of Modem Pins to Plug into System Controller
c. Location of Modem Installed into the System Controller
Figure 17 Modem Installation
3.
With the modem inserted into position, secure with the screws provided to complete the installation.
4.
Replace the System Controller by following the instructions in the System Controller - Install / Remove
section.
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Remove Modem (Refer to Figure 17):
1.
Remove the System Controller from the shelf per the System Controller - Install / Remove section.
2.
Remove the modem: pull gently until the modem is removed. Refer to Figure 17.
3.
Replace the System Controller by following the instructions in the System Controller - Install / Remove
section.
Distribution Monitor - Install / Remove
The distribution monitor (DM) may be removed / installed while the system is operating without interrupting power
delivered to the load as long as CB1 is ON. The INVERTER MAJOR alarm will be asserted (MAJ alarm signals and
INVERTER MAJOR LED).
Install Distribution Monitor (Refer to Figure 18):
1.
Insert the distribution monitor into Distribution Disconnect Module, using the formed handle.
2.
Secure the distribution monitor screws located at the top and bottom of the DM front panel (2 screws total).
3.
Shortly after installation, the green OK LED on the distribution monitor will illuminate. Within 60 seconds,
the System Controller will automatically perform a system update to recognize the new distribution
monitor and the inverter major alarm will retire.
4.
When installation is complete, the controller will reinitialize as described in steps 6, 7 and 8 of the
Operational Checkout Routine found in the Shelf Turn On and Operational Checkout section.
CB1
Loosen/tighten screws for
removal/installation of
Distribution Monitor
Formed handle
Module retaining
screw
Module removal handle
Figure 18 Distribution Monitor/Distribution Disconnect Module Removal and Installation
Remove Distribution Monitor (Refer to Figure 18):
1.
Loosen the screws located at the top and bottom of the distribution monitor front panel (2 screws total). Do
not loosen the module retaining screw.
2.
Grasp distribution monitor by the formed handle and pull it out.
3.
Protect distribution monitor within an ESD bag.
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Distribution Disconnect Module - Install / Remove
The Distribution Disconnect Module (DDM) may be removed / installed while the system is DC powered, as long as CB1 is
OFF. When CB1 is OFF the system does not power AC output, an INVERTER MAJOR Alarm is indicated on the System
Controller and the STANDBY LEDs of all inverters of the shelf will be lit.
NOTE: Equipment powered by the system will not receive AC power from the system when CB1 is OFF or the
Distribution Disconnect Module has been removed.
NOTE: With the distribution monitor still plugged in, wait until all inverters go into Standby (STANDBY LED lit on all
inverters) before removing the module.
Install Distribution Disconnect Module (Refer to Figure 18):
1.
With CB1 in the OFF (down) position, insert the new Distribution Disconnect Module.
2.
Gently slide the new module into the shelf until it is flush with the rest of the modules.
3.
Assure the STANDBY LEDs are lit on all inverters of the shelf.
CAUTION:
Do not turn CB1 to ON unless all inverters of the shelf are in STANDBY.
4.
Place CB1 in the ON (up) position. The green OK LED on the Distribution Monitor will light. The System
Controller will update (this may take a minute or so), the red INVERTER MAJOR LED will extinguish and the
individual inverters will come on-line with their green OK LEDs illuminating.
5.
Tighten the Phillips head module retaining screw located at the bottom of the module.
6.
After replacement of any module, refer to the Shelf Turn On and Operational Checkout section to verify
proper operation by performing the initial turn on procedure.
7.
Operate the Maintenance Bypass Switch to the Inverter position if equipped.
Removal Distribution Disconnect Module (Refer to Figure 18):
1.
Operate the Maintenance Bypass Switch to the Utility position if equipped.
2.
Place CB1 in the OFF (down) position
3.
Loosen the module retaining screw located at the bottom of the module.
4.
Grasp the module removal handle and slowly remove the Distribution Disconnect Module from the shelf.
5.
Protect module in an ESD bag.
6.
Assure the STANDBY LEDs are lit on all inverters of the shelf.
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Initial Turn On, Setpoints, and Adjustments
Shelf Turn On and Operational Checkout
Complete operational checkout prior to applying loads after initial installation of the plant, after the addition of a
shelf, and after maintenance requiring power-down. If a plant fault has been identified refer to the Troubleshooting
section.
NOTE: Proceed only after: the plant is installed, input power is available, outputs are tied to the AC distribution panel or
loads, and all other plant interface connections have been made.
CAUTION: Multi-Shelf Systems Only
•
Damage to inverters may occur if a shelf does not have a functioning System Controller or if an improper
power-up sequence is followed.
•
Never close a shelf CB1 when the shelf is DC powered unless there is a functioning System Controller in the
shelf and the shelf’s inverters are indicating STANBY mode (amber LEDs ON).
Note: Complete steps 1-10 (setup all shelves) before closing CB1 on any shelf.
1.
Ensure CB1 is OFF on all Distribution Disconnect Modules.
2.
Check power wiring for errors. Measure inputs and outputs to GND for shorts.
3.
Apply power to the DC inputs of all shelves.
4.
All inverter STANDBY LEDs – ON.
LEDs briefly cycle ON then OFF as the inverters initialize.
5.
Verify that
i. System Controllers: INVERTER MAJOR LED - ON
ii.
Distribution Monitors: OK LED - OFF
iii. Each Inverter: STANDBY LED - ON
6.
Wait for System Update to complete. During this period the red FAIL LED on each inverter will flash until it is
communicating with the System Controller and the controller displays indicates:
SYSTEM UPDATE
IN PROGRESS.........
7.
Once all inverters are communicating with the System Controller the following screen will appear, provided
there are no alarm conditions (in place of the "X" will be the users actual voltage and current readings):
XXX VAC
X AAC
SYSTEM - GOOD
8.
The current status of the system should be as follows:
i.
ii.
System Controllers:
1.
CONTROLLER LED – ON green
2.
INVERTER MAJOR LED – ON red
Inverters:
3.
9.
s
STANDBY LED – ON
For each shelf in turn, set the SHELF # setpoint to a unique number between 1 and 4. The shelf designated as
“1” becomes the primary shelf.
Refer to the Display Navigation and Push Buttons section and to Setpoints in the Display Menus section.
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NOTE: In the following steps, closing a CB1 circuit breakers (up position) will energize the loads connected to the plant,
further, in multiple-shelf systems the AC output from any shelf will feed back to the AC output terminal blocks on all
shelves.
CAUTION: In a multiple shelf system, never close a shelf CB1 when the shelf is DC powered unless there is a
functioning System Controller in the shelf and the shelf’s inverters are indicating STANBY mode (amber
LEDs ON).
10. Assure that all inverters on all shelves are indicating standby mode - all STANDBY LEDs - ON.
11. Turn ON CB1 circuit breakers of all shelves.
12. Observe the Controller goes through the System Update process for all the modules on its shelf and the
inverter OK LEDs all turn ON.
13. Observe that
•
Each Inverter green OK LEDs is ON
•
Each Distribution Module green OK LEDs are ON,
•
Each System Controller red INVERTER MAJOR LED is OFF, and
•
Each System Controller green LED is ON.
14. If no alarms are present, the displays will appear as follows:
XXX VAC
X AAC
SYSTEM - GOOD
s
15. The system displays will appear as follows if there are any alarm conditions:
120 VAC
X AAC
SYSTEM - ALARM
s
16. Pressing the SEL key will take the user to the main menu displayed as follows. From the main menu, the user
can review the plant status or make system changes.
PLANT ALM BATT
SETPT INV
s
17. The active selection will be flashing. The user can press SEL to select the active selection, or may scroll to the
next selection by the use of the arrow keys. Pressing the BACK key will take the user back to the System Status
Screen.
Refer to Display Navigation and Push Buttons and Display Menus sections.
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Adjusting Setpoints
Refer to the Display Navigation and Push Buttons section and to Setpoints in the Display Menus section.
TABLE 7: Factory Setpoint Defaults
Inverter
120 Vac
240 Vac
−48 Vdc
+24 Vdc
−48 Vdc
Inverter Max RMS I
12.5
6.0
5.0
Aac
Inverter Max Peak I
28.0
14.0
14.0
Aac
Inverter Hi Crest Factor
0.00
0.00
0.00
Plant Low Voltage
95
95
190
Vac
Plant Hi Voltage
130
130
250
Vac
Battery Low Voltage
-44.0
22.0
-44.0
Vdc
As Equipped
As Equipped
As Equipped
Shelf #
1
1
1
% of capacity
80
80
80
# of
Inverters 8
%
Navigate to the Main Menu on the System Controller by pressing SEL from the System Status Screen. The Main Screen
will appear as follows:
PLANT
ALM
SETPT
INV
BATT
s
Press the right arrow key until SETPT is flashing. Then press the SEL button.
Once SETPT is selected from the main menu, the following menu appears:
SETPOINTS
s
Pressing SEL at any time during an active screen will allow that setpoint to be adjusted and the arrow keys will adjust
the value.
Pressing SEL again will prompt the user whether or not they would like to CANCEL or ACCEPT the change. The active
choice will be flashing and can be changed by the use of the arrow key. Pressing SEL at this time will either ACCEPT or
CANCEL the setpoint change. Failure to do anything within 15 seconds will result in the system defaulting to the
previous setpoint.
When viewing the screens, there will be a letter combination or a number located on the left side of the display. These
represent the following:
a.
GL - Global (setpoints that affect multiple modules of the same type)
b.
00-System Control
c.
15- Distribution Monitor
d.
1 thru 6-Inverters
The following are the screens that are available from the SETPT menu:
8
The "number of Inverters" setpoint is dynamically updated by the System Controller approximately every minute.
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INV MAX RMS I 
GL
10.0
Aac
PLANT HI VOLTS 
s
15
INV MAX PEAK I 
GL
28.0
Aac
s
15
s
SHELF # (1 – 4)

1
44.0 Vdc s
#
2.80
GL
INVERTERS
15

1 (As Shipped)
# REDUNDAND IMs 
s
15
1
PLANT LO VOLTS 
% OF CAPACITY
15
15
100
Vac s
BATTERY LO VOLT 
INV HI CR FACT 
GL
130
Vac s
80 %
s

s
When making adjustments, attempting to set the PLANT HI VOLTS setpoint below the PLANT LOW VOLT setpoint will
cause an error condition.
Table 8 Setpoint Resolution
NAME
DECIMAL
PLACES
RESOLUTION
UNITS
Output True Power
0
10
W
INV MAX RMS I
1
0.10
Aac
1
0.20
Aac
2
(0.03 9 @ nominal load)
None
Output Frequency
1
Period + / - 39µ S
Hz
Inv Temp #1
0
1.0
°C
Inv Temp #2
0
1.0
°C
% OF CAPACITY
0
10
%
# REDUNDAND IMs
0
1
None
(Output Eff. Current)
INV MAX PEAK I
(Output p-p Current)
INV HI CR FACT
(Crest Factor)
(# Redundant Inv)
9
Based on Irms and Ip resolution.
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Specifications
Table 9 Specifications - Inverter
SI5A120PME series
SI10A120PME series
SI5A240PME series
+24 Vdc Input
−48 Vdc Input
−48 Vdc Input
Input (per module)
Input Voltage
Operate
+21.0 to +32.0 Vdc
-42.5 to −60.0 Vdc
-42.5 to −60.0 Vdc
Start-up
+24.5 Vdc minimum
−49.6 Vdc minimum
−49.6 Vdc minimum
+27.0 Vdc
−54.0 Vdc
−54.0 Vdc
Input Current
35.0 A maximum
35.0 A maximum
35.0 A maximum
Input Power
668 W maximum
1337 W maximum
1337 W maximum
Breaker (customer
provided)
40 A minimum, per installed
module
40 A minimum, per installed
module
40 A minimum, per installed
module
Typical
Output (per module)
Output Voltage 10
120 Vac
120 Vac
240 Vac
Output Current
5 Aac maximum
10 Aac maximum
5 Aac maximum
Output VA
600 VA maximum
1200 VA maximum
1200 VA maximum
Total Harmonic
Distortion (THD)
2 % maximum
< 1% typical
Regulation 11
5%
Environmental
Heat Release 12
314 BTU/hr
Temperature
0 to +50 °C
778 BTU/hr
778 BTU/hr
Full Load
Mechanical
Weight
6.5 lb
Cooling
Front to rear forced air
10
Not adjustable, at No-load
11
Regulation = (No-load voltage - Full-load voltage) / Full-load voltage.
12
Heat Release - per inverter, full load, typical.
Special room cooling may be required.
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Table 10 Specifications - Inverter System
AC Configuration
Configuration
Line to Neutral, Single Phase
Mechanical
Height (shelf)
8.72"
Depth (shelf)
15.03”
Width (shelf)
Available for 19" or 23" Rack Mounting
Mounting
Relay Rack or Cabinet
Inputs/Outputs
Input Voltage and Current
per installed Inverters - See Table 9 Specifications - Inverter
Output Voltage
per installed Inverters - See Table 9 Specifications - Inverter
Output kVA per shelf
Alarm Contact Ratings
−48 Vdc
23” 7.2 kVA
19” 4.8 kVA
+24 Vdc
23” 3.6 kVA
19” 2.4 kVA
60 Vdc at 0.5A
Shelf Distribution Disconnect Module Output Protection
Circuit Breaker
100A single pole
Environmental
Acoustic Noise
Temperature
45 dBA at 3 meters
Ambient
Operating
Storage
Sea Level to 4800 feet
0 to +45 °C
continuous
-40 to +85 °C
Humidity
<95% Non-condensing
Shock
This equipment, in its shipping container, withstands shock developed during
shipping without physical damage or degradation of the electrical
performance.
Vibration
This equipment, in its shipping container, withstands vibration encountered in
shipping without physical damage or degradation of the electrical
performance.
Installation Area
Installation Area Limitations
Install only in restricted access areas (dedicated equipment rooms,
equipment closets, or the like) in accordance with articles 110-26, 11027, and 110-18 of the U.S. National Electric Code (NEC-2011), ANSI/NFPA
No. 70, and pursuant to applicable local codes.
Safety and Standards
Safety
ETL Listed
NEBS
NEBS Level 3 Tested and Complaint
Electromagnetic Immunity
Meets Telcordia GR-1089-CORE ISSUE 6 [IEC801-2 level 2,4,5
Radiated and Conducted
Emissions
FCC Part 15, Class A
Radiated Emissions
FCC Class A, EN55022 (CISPR22) level A
Electrostatic Discharge
EN61000-4-2 Level 1-4
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EN55022 (CISPR22), Class A
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827E Modular Inverter System ProductManual
Table 10 Specifications - Inverter System
RF Immunity
IEC61000-4-3 Level 3, 10 V/m
Conducted Immunity
IEC 61000-4-6 Level 3 Input Power Ports GR1089 ISSUE 6
IEC 61000-4-6 Level 2 Telecom Ports GR1089 ISSUE 6
Earthquake & Office Vibration
NEBS Zone 4 level 3
Voltage Dips, Interruptions, and
Variations
IEC 61000-4-11, EN55024 (CISPR24)
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827E Modular Inverter System ProductManual
Features Reference
The system comes with many unique features. These features are detailed in the following paragraphs.
Front Access: The system has been designed to allow the user total front access to all controls and indicators.
AC Output Distribution
AC output from the inverters is a single terminal block per shelf.
Optional AC Distribution Panels provide load circuit breakers.
Optional Maintenance Bypass Panel provides a single AC input and output for multiple shelf systems by aggregating the
AC connections of multiple shelves.
Inverter
Inverters (Figure 2) provide regulated AC voltage to the load. In the event of a System Controller failure, the imbedded
controls within the microprocessor-controlled inverter will allow the inverter to continue operation (fail safe operation).
Indicators on Inverter: Each inverter is equipped with the following indicators (multiple LEDs may be illuminated at
the same time):
FAIL LED (red) indicates fault of the inverter or of communication with the System Controller.
ON indicates output failure due to an inverter internal fault. Internal faults include:
•
Inverter output voltage exceeds the high voltage shutdown point.
•
Over temperature.
•
Any failure condition that disables the inverter output.
Flashing indicates minor failures that cause output failure. Minor faults include:
•
Loss communications with the System Controller
•
Internal high temperature
•
Loss of frequency lock
•
Software problem
•
High peak current, high rms current, or high crest factor
STANDBY LED (amber) indicates that the inverter is in Standby. Standby is due to:
•
The user or the System Controller has placed the inverter in standby mode
•
The inverter has just been inserted into the shelf and has not yet synchronized with other operating
inverters.
•
CB1 on DDM is OFF or tripped and Auto-Standby is enabled.
OK LED (green) indicates that the inverter is operating normally and is capable of providing output power.
Distribution Disconnect Module (DDM)
The Distribution Disconnect Module 13 (Figure 2) provides an AC disconnect and shelf distribution monitoring via the
Distribution Monitor (DM). The AC disconnect is a circuit breaker that provides overload protection and fault isolation.
The DDM works with the System Controller to monitor shelf operation.
13
Distribution Disconnect Module, Distribution Monitor, and System Controller features refer to a single shelf. The
described features are duplicated and are independent of each other in each shelf of multiple shelf systems.
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827E Modular Inverter System ProductManual
Distribution Monitor (DM)
The Distribution Monitor13 (Figure 2) provides the system monitoring including AC voltage, and AC current. In addition
Indicators on Distribution Monitor: OK LED (green) reports plant status.
Note: This LED will not be illuminated if the distribution monitor has an internal fault or if CB1 is open.
System Controller
The System Controller13 (Refer to Figure 2) allows the user to view plant status and change system and inverter
setpoints either from the front panel or through the serial interface located on the front panel. A modem is optional for
remote access; refer to the J-Drawing L20 and L22 for modem and software ordering information. The System
Controller is easy to use, convenient, and allows the user to quickly change system setpoints without accessing the
inside of the inverters.
Indicators on System Controller:
Controller LED (green) indicates that the Distribution Module has passed its internal self- test.
Inverter Minor LED (amber) is a summation alarm indicator and reports plant status in a variety of ways,
depending on the condition. The reported conditions are defined in the condition chart provided in the
Troubleshooting section.
Inverter Major LED (red) is a summation alarm indicator and reports plant status in a variety of ways,
depending on the condition. The reported conditions are defined in the condition chart provided in the
Troubleshooting section.
Adjustable Alarm Setpoints: Setpoints are adjusted through the System Controller.
Refer to Adjusting Setpoints for more detail.
Alarm Settings Associated with Plant:
Settings are for 120 Vac and 48 Vdc plants. Settings for 240 Vac and +24 Vdc plants are in parentheses.
Plant Low Voltage Alarm Setpoint
Range 90.0 to 120.0 Vac (180.0 to 240 Vac)
Factory set to 95 Vac (190 Vac)
Plant High Voltage Alarm Setpoint
Range 110.0 to 140.0 Vac (220.0 to 280 Vac)
Factory set to 130 Vac (260 Vac)
Battery Low Voltage Alarm Setpoint (for –48 Vdc input inverter system)
Range -42.0 to -55.0Vdc (21.0 to 27.5Vdc)
Factory set to -44.0Vdc (22.0Vdc)
Number of Redundant Inverters Setpoint
Range 0 to 5.
Factory set to 1.
Percent of Capacity Setpoint
Adjustable from 0% to 100% in steps of 10.
Factory set to 80%.
Percent Capacity Alarm Algorithm
Shelf Current > (# inverters - # redundant-inverters)* inverter-capacity * (% of capacity)
for more than 2 seconds.
Alarm Settings Associated with Inverters 14
Settings are for 10 Aac inverters. Settings for 5 Aac inverters are in parentheses.
Hi Output Current RMS Alarm
Range 8.0 to 15.0 Aac (4 to 7.5 Aac)
Factory set to 12.5 Aac (6.25 Aac)
14
System will indicate an alarm after the set threshold has been exceeded for 5 seconds.
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827E Modular Inverter System ProductManual
Hi Output Current RMS Alarm
Range 4.0 to 7.5 Aac (4.0 to 3.75 Aac)
Factory set to 6.0 Aac (3.0 Aac)
Hi Output Current Peak Alarm:
Range 18.0 to 28.0 Aac (9.0 to 14.0 Aac)
Factory set to 28.0 Aac (14.0 Aac)
Hi Output Current Peak Alarm
Range 9.0 to 14.0 Aac (4.5 to 7.0 Aac)
Factory set to 14.0 Aac (7.0 Aac)
Hi Crest Factor Alarm (Peak/RMS)
Range 0.00 to 5.00
Factory set to 0.00 (disabled).
Crest Factor is a ratio between Peak and RMS current. A purely resistive load powered by a
sine wave voltage has a crest factor of 1.414. Nonlinear loads, such as electronics without
power factor correction, will have crest factors higher than 1.414.
Each inverter meters its crest factor. The metered crest factor can be displayed through the
System Controller.
To enable this feature change the setpoint to the desired value between >0 and 5.0. Be certain
to display and note the reported crest factor through the System Controller prior to enabling
this alarm.
Crest factor >3.0 indicates a very nonlinear load.
To avoid nuisance alarms leave the crest factor disabled or set the threshold to >1.5 x the
measured crest factor. There is no practical reason to set the Crest Factor alarm at a value
below 2.5.
Shelf Number Setting
Range 1 through 4.
Factory set to 4.
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827E Modular Inverter System ProductManual
Display Navigation and Push Buttons
The System Controller has four momentary push buttons to navigate menus and adjust the plant and inverter setpoints.
Figure 19 Controller Pushbuttons
Selected Screen Item – The selected screen item flashes approximately once a second.
On Screen Button Indicator Each screen displays one or more indicators of which buttons are usable.
Indicator
s
→
←
↔
Active Buttons
SEL
+
 /—
 /+ &  /—
 /
Buttons
BACK
Navigates to the previous menu, one menu each time the switch is depressed. Continually pressing the
switch will eventually return to the System Status Screen (Main Screen).
 (Left Arrow) /
— (Minus Symbol)
Menu Navigation
•
Selects the menu item to the left
Inverter Select
•
Decreases the Inverter Number
Inverter Status Navigation
•
Moves to the previous item
Adjustment
•
 (Right Arrow) /
Reduces a setpoint value
+ (Plus Symbol)
Navigation
•
Selects the menu item to the right
•
Moves to the next menu
Inverter Select
•
Increases the Inverter Number
Inverter Status Navigation
•
Moves to the next item
Adjustment
•
Increases a setpoint value in a step dependent upon the parameter being set.
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827E Modular Inverter System ProductManual
SEL
Navigation
•
Moves to the Main menu (only from the System Status Screen)
•
Moves to menu of the selected item
Inverter Select
•
Moves to first Status item of the selected Inverter
Inverter Status Navigation
•
Moves to the previous Status item
Adjustment / Control
•
Moves to the Change ACCEPT / CANCEL screen
•
Executes selected ACCEPT / CANCEL choice
Display Menus
There are several menus available from the System Controller. See Figure 20 for a diagram of menu structure.
System Status Screen (Main Screen): Upon initial start-up the system will perform an LED test and will attempt to
recognize the system components. During this period the FAIL lamps on the inverters will flash. This will take a few
minutes. The System Controller LCD will display the System Update screen during this time.
SYSTEM UPDATE
IN PROGRESS
Once all the components are recognized, the System Status screen will appear as follows:
Normal
120 VAC
Alarm Active
X AAC
SYSTEM - GOOD
s
120 VAC
X AAC
SYSTEM - ALARM s
Note: Actual system voltage and current will be displayed.
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827E Modular Inverter System ProductManual
Pressing SEL moves to the main menu to view the alarms, module status, or make system changes.
Main Menu
120 Vac
X AAC
SYSTEM GOOD
SEL
s
PLANT ALM BATT
SETPT INV
The Main Menu is selected by pressing SEL from the System Status Screen and allows selection of several other
menus. Most option screens at this point are passive (view only), however plant and inverter setpoints can be
viewed and set from the SETPT screen. Also included are PLANT, ALARM, INV and BATT.
Note: The main menu is a dynamic screen. PLANT, ALM, BATT, and SETPT are always present. INV will appear
only when an inverter is installed and communicating with the System Controller.
The active selection will be flashing. The user may press SEL to select the active selection, or may scroll to the
next selection by the use of the arrow keys. Pressing the BACK key will take the user back to the main screen.
Plant
120 Vac
X AAC
SYSTEM GOOD
s
SEL
PLANT ALM BATT
SETPT INV
SEL
ACDM 827E
STAT CTRL INFO s
Selecting PLANT from the main menu allows the plant status to be viewed. The PLANT menu will appear
as follows (Use the arrow keys, followed by the SEL button, to select an option):
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827E Modular Inverter System ProductManual
Plant Status
120 Vac
SEL
X AAC
SYSTEM GOOD
s
SEL
PLANT ALM BATT
ACDM 827E
SETPT INV
STAT CTRL INFO s
STAT (plant) presents plant status in a sequence of screens.
Press  or  to move through the sequence of screens.
Note: The current status of the given condition will be flashing in the following screens.
PLANT VOLTAGE
120
VAC
PLANT HZ

PLANT CURRENT
5
AAC
OK

EXCEED 
PLANT BREAKER
HZ

PLANT KVA
0.5

PLANT LOAD
PLANT HZ
60.0
NORMAL FAULT
NORMAL OPEN

BATTERY VOLTS
KVA

DM BIAS FAIL
NORMAL FAULT
NORMAL FAULT

CAL TABLES

PRGM’D UN-CAL 
PLANT VOLTS
NORMAL FAULT

NOTE: “PLANT BREAKER” is Distribution Disconnect Module CB1 AC Load Disconnect.
Plant Control
120 Vac
X AAC
SYSTEM GOOD
SEL
s
PLANT ALM BATT
SETPT INV
SEL
ACDM 827E
STAT CTRL INFO s
In CTRL (plant) Auto-Standby may be enabled or disabled.
Note: In the following screen, the current status of the given condition will be flashing.
AUTO - STANDBY
ENABLE
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827E Modular Inverter System ProductManual
Plant Information
120 Vac
X AAC
SYSTEM GOOD
SEL
s
PLANT ALM BATT
SEL
SETPT INV
ACDM 827E
STAT CTRL INFO s
INFO (plant) presents applicable manufacturer’s data including part number, revision number,
manufactured date, serial number, CLEI number, and CPR number in a sequence of screens.
Press  or  to move through the sequence of screens.
Note: The following screens are dynamic and only appear if the module is installed.
SC = System Controller
DM = Distribution Monitor.
The table is further defined as follows:
 Serial number of module
 Assembly part number of module
 EC level of module
 Manufacture date of module
 CLEI or CPR number
 Software version installed in module
SC 0051
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
DM 6200290P 
SC 6180443P 
DM 8600911P 
SC 8600815P 
DM 990120
SC 0412
DM CLEI

SC CLEI N/A 
DM CPR

SC CPR N/A 
DM SW 2


SC SW 4

DM 0051


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827E Modular Inverter System ProductManual
Alarm
120 Vac
X AAC
SYSTEM GOOD
SEL
s
PLANT ALM BATT
SEL
ACTIVE ALARMS:
SETPT INV
NONE
ALM presents all active plant alarm status.
One of the following screens will display.
Normal
Alarm Active
ACTIVE ALARMS:
ACTIVE ALARMS:
NONE
YES
s
When alarms are active press SEL to view the alarms in a sequence of screens.
Press  or  to move through the sequence of screens.
Example:
ACTIVE ALARMS:
00 MOD FAIL MIN
Note: The number preceding the alarm indicates the module designation (see Figure 1).
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827E Modular Inverter System ProductManual
Setpoint
120 Vac
SEL
X AAC
SYSTEM GOOD
SEL
PLANT ALM BATT
s
SETPOINTS
SETPT INV
s
SETPT provides plant setpoint view and change.
SETPOINTS
s
Press SEL to view setpoints in a sequence of screens.
Press  or  to move through the sequence of screens.
INV MAX RMS I 
GL
12.5 Aac
PLANT HI VOLTS 
s
15
INV MAX PEAK I 
GL
28.0
130
Vac s
BATTERY LO VOLT 
Aac
s
15
44.0 Vdc s
INV HI CR FACT 
#
GL
s
15

# REDUNDANT IMs 
0.0
SHELF # (1 – 4)
GL
1
s
INVERTERS
15
6 (As Shipped)
1
PLANT LO VOLTS 
% OF CAPACITY
15
15
95
Vac s

s

80 %
s
GL - Global; 00-System Control; 15 Distribution Monitor; 1-6 Inverters
Global - Setpoints that affect multiple modules of the same type.
Press SEL while viewing a setpoint to move to the adjustment screen for that setpoint.
Press the + and - buttons on the adjustment screen to adjust the value.
Press SEL on the adjustment screen save the value change.
The controller prompts to CANCEL (default) or ACCEPT the change.
Press arrow keys to toggle between CANCEL and ACCEPT.
Press SEL to confirm the selection.
Failure to press a button within 15 seconds will CANCEL the change.
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827E Modular Inverter System ProductManual
Inverter
120 Vac
SEL
X AAC
SYSTEM GOOD
PLANT ALM BATT
s
SETPT INV
SEL
INVERTER SELECT
01
s
INV provides status, information, and control of each individual inverter.
INVERTER SELECT
01

s
Press  or  to move through the sequence of inverters (01 through 06).
Press SEL move to the menu of the selected inverter.
IM INVERTER
01
STAT CTRL INFO s
The default selection will be flashing. Use the arrow keys to switch between the sub-menus.
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827E Modular Inverter System ProductManual
Inverter Status
120 Vac
X AAC
SYSTEM GOOD
IM INVERTER
SEL
s
PLANT ALM BATT
SETPT INV
SEL
SEL
INVERTER SELECT
01
s
01
STAT CTRL INFO s
STAT provides individual inverter status in a sequence of screens.
Press  or  to move through the sequence of screens.
01 I OUT PEAK
01 INV RUN MODE
3.5 Aac 
01 I OUT RMS
01 CREST FACTOR

01 TRUE POWER
122 Watt 
01 FREQUENCY
60.0 Hz

01 INV TEMP #1
26 deg C

01 INV TEMP #2
27 deg C
Note:
RUN 
01 LD SHARE MODE
1.4 Aac 
1.50
STNDBY
01 HI RMS I
OFF
ON

NORMAL ERROR 
01 HI CREST FACT
NORMAL ERROR 
01 HI TEMP ALARM
01 FREQ LOCK
NORMAL ERROR 
NORMAL ERROR 
01 HI RAIL VDC
01 OUTPUT FUSE
NORMAL ERROR 
NORMAL FAIL
01 LO INPUT VOLT
01 CAL TABLES
NORMAL ERROR 
PRGM’D UN CAL 

01 LO VOLT OUT
NORMAL ERROR 
01 HI VOLT OUT

NORMAL ERROR 
01 INV STATUS
01 HI PEAK I
NORMAL FAILED 
NORMAL ERROR 
Status screens are view only.
“01” indicates Inverter Position 01. See Figure 1.
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827E Modular Inverter System ProductManual
Inverter Control
120 Vac
X AAC
SYSTEM GOOD
IM INVERTER
SEL
s
PLANT ALM BATT
SEL
SETPT INV
SEL
INVERTER SELECT
01
s
01
STAT CTRL INFO s
CTRL provides individual inverter standby / run mode control.
01 INV MODE
SAME RUN STDBY s
Press arrow keys to change the active selection (indicated by flashing).
Press SEL to change the inverter to the active selection.
If a change is made the system prompts to ACCEPT or CANCEL.
CONTROL CHANGE
CANCEL ACCEPT
Press arrow keys to toggle between CANCEL and ACCEPT.
Press SEL to confirm the selection.
Failure to press a button within 15 seconds will CANCEL the change.
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827E Modular Inverter System ProductManual
Inverter Information
120 Vac
X AAC
SYSTEM GOOD
IM INVERTER
SEL
s
PLANT ALM BATT
SETPT INV
SEL
SEL
INVERTER SELECT
01
s
01
STAT CTRL INFO s
INFO provides individual inverter applicable manufacturer’s in a sequence of screens.
Serial number of module
Assembly part number of module
EC level of module
Manufacture date of module
CLEI or CPR number (future)
Software version installed in module
IM 0192 
IM SI10A120PME 

IM 8500946P 
IM 0412 

IM CLEI N/A 
IM CPR N/A 

IM SW 4 

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4380419PD r33 April 2013
ACDM 827E
STAT CTRL INFO s
PLANT ALRM BATT
SETPT INV
s
s
GL = GLOBAL
00 = SYSTEM CONTROL
15 = DISTRIBUTION MOD
1 - 6 = INVERTER MODULES
% OF CAPACITY
15 xx%
s
# REDUNDANT IMs
15 1
s
DM CPR
DM SW2
SC = System Controller
DM = Distribution Monitor
# INVERTERS
15 6 (As equipped)
BATTERY LO VOLT
15 xxx Vdc
s
DM 6200390P
DM 860911P
DM BIAS FAIL
NORMAL FAULT
DM 0412
DM CLEI
PLANT HI VOLTS
15 xx Vac
s
SC SW4
DM 0051
PLANT KVA
ENABLE DISABLE
STAT continues on with:
Plant Volts (Normal or Fault)
Plant Hz (Normal or Fault)
Plant Load (Ok or Exceed)
Plant Breaker (Normal or Open)
Battery Volts (Normal or Fault)
Cal Tables (Prgm'd or Uncal)
PLANT LO VOLTS
15 xx Vac
s
s
SHELF # (1 - 4)
GL
1
SC CLEI N/A
SC CPR N/A
s
INV HI CR FACT
GL x.xx
INV MAX PEAK I
GL xx.x Aac
s
INV MAX RMS
GL xx.x Aac
SETPOINT
PLANT ALRM BATT
SETPT INV
PLANT HZ
x.x
HZ
SC 0051
SC 6180443P
These two boxes are
shown for example only.
This section will list
specific errors to the
users system. Use the
right and left arrow keys
toscroll through all of the
error messages.
ACTIVE ALARMS:
01 HI CREST FACT
ACTIVE ALARMS:
00 MOD FAIL MIN
ACTIVE ALARMS
s
YES
ACTIVE ALARMS
WILL BE DISPLAYED
CONFIRM CHANGE
CANCEL ACCEPT
01 INV MODE
SAME RUN STDBY s
IM INVERTER 01
STAT CTRL INFO s
STAT continues on with:
CREST FACTOR
TRUE POWER
FREQUENCY
INV TEMP #1
INV TEMP #2
INV STATUS (Normal or Fail)
INV RUN MODE (Standby or Run)
LD SHARE MODE (Off or On)
HI TEMP ALARM (Normal or Error)
HI RAIL VDC (Normal or Error)
LO INPUT VOLT (Normal or Fail)
LO VOLT OUT (Normal or Fail)
HI VOLT OUT (Normal or Error)
HI PEAK I (Normal or Error)
HI RMS (Normal or Error)
HI CREST FACTOR (Normal or Error)
FREQ LOCK (Normal or Error)
OUTPUT FUSE (Normal or Fail)
CAL TABLES (Prgm'd or Un-cal)
01 I OUT RMS
x.x Aac
01 I OUT PEAK
x.x Aac
IM INVERTER 01
STAT CTRL INFO s
IM SW4
IM CLEI N/A
IM CPR N/A
IM 8500946P
IM 0412
IM 0912
IM SI10A120PM1
IM INVERTER 01
STAT CTRL INFO s
The italics represents the flashing selection.
IM INVERTER 01
STAT CTRL INFO s
INVERTER SELECT
s
01
PLANT ALRM BATT
SETPT INV
The italics represents the flashing selection.
or
SC 8600815P
SC 0412
15 AUTO STANDBY
ENABLE DISABLE
PLANT VOLTAGE
xxx
Vac
ACDM 827E
STAT CTRL INFO s
ACTIVE ALARMS:
00 MINOR ALARM
BATTERIES
ACTIVE ALARMS
YES
s
s
PLANT ALRM BATT
SETPT INV
PLANT ALRM BATT
SETPT INV
PLANT ALRM BATT
SETPT INV
ACTIVE ALARMS
NONE
PLANT CURRENT
xx.x Adc
ACDM 827E
STAT CTRL INFO s
ACDM 827E
STAT CTRL INFO s
The italics represents the flashing selection.
xxxVac
xxxAac
SYSTEM-ALARM s
The italics represents the flashing selection.
SYSTEM UPDATE
IN PROGRESS.....
827E Modular Inverter System ProductManual
Figure 20 Menu Structure - Typical
54
827E Modular Inverter System ProductManual
Theory of Operation
When the input voltage is greater than the minimum start-up voltage, the inverters will start-up and convert DC input to
AC output. Inverters are connected in parallel, providing power output that increases with the addition of each inverter.
A total of four fully loaded inverter shelves (24 inverters total) may be placed in parallel. When the system is operating
and within the preset parameters, the green OK LED on each inverter will be illuminated.
When there is an inverter failure, a red FAIL lamp will illuminate on the front of the inverter and the system will report a
Minor alarm, both on the System Controller and the output relay. If two or more inverters fail per shelf, the red FAIL lamp
will illuminate on all affected inverters and the system will report a Major alarm, both on the System Controller and the
output relay.
The AC output voltage is monitored by the Distribution Monitor. In the event that the AC voltage climbs to an
undesirable range, this module will disconnect the AC output. This module is located within the Distribution Disconnect
Module that houses an AC output breaker. The breaker will trip if the output current drawn exceeds its rating. The
breaker is also provided for the user to manually disconnect the system output from the load.
When the batteries voltage drops below -42.0Vdc for −48 Vdc input inverter systems (or +21.0Vdc for +24 Vdc input
inverter systems) inverters will turn off and an Inverter MN alarm will occur. When the plant recovers (DC Input is
restored), the Inverter MN, lamp will extinguish, MN Form C alarm will retire, and the system will restart automatically
and provide output. To learn more about any of these features, refer to the Features Reference section. To learn about
adjusting the settings of the inverter or the system, refer to the Adjusting Setpoints section.
Output Protection
There are several levels of output current limit or output protection.
When gradually increasing the load, the inverter goes into the first protection mode at about 160% of the nominal load.
This protection mode decreases the inverter voltage and limits the output current.
When short circuit or deep overload is applied to the inverter output, it goes in fast current protection mode, which
means that the output current is limited to 28A. In this mode the output current is close to a square wave and the
output voltage is usually very low.
The inverter stays in this mode for no longer than 5s. Within this time, the load fuse or circuit breaker protecting the
defective circuit should clear. If, after 5s, the short circuit remains, the inverter will open its output relay.
When there is a system of N inverters, they do not lose synchronization during the short circuit mode. After the short is
cleared, the inverter outputs are synchronized and sharing again.
Figure 21 shows inverter Voltage on Ch2 and Inverter current on Ch1 while a short circuit is applied with no distribution
protection. The Inverter current limits at 28A for 5s, and then opens the output relay.
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827E Modular Inverter System ProductManual
Figure 21 Output Protection, Short Circuit with no Fuse
Figure 22 shows two inverters running when a short circuit is applied in a circuit protected by a fuse. The output voltage
is on Ch1, and two of the output inverter currents are on Ch4 and Ch3.
The Inverters clear the fuse within a few cycles and then the output voltage returns. Note that the inverter output
currents are load sharing after the short is cleared. A fuse or circuit breaker trip time will shorten as more inverters are
present in the system. Trip-time curves for circuit breakers and fuses are usually found in their datasheets. Use 28 amps
per inverter (short circuit current) to determine the trip-time from the datasheet curve.
Figure 22 Output Protection - Short Circuit with Fuse
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Output Paralleling and Hot Insertion
Critical AC loads can be powered from the existing telecom battery plant via an inverter system IF:
•
The inverters do not endanger or degrade the battery plant in any way (e.g., voice band noise), and
•
The inverter system output (Vbus) does not fail.
When paralleling inverters both phase and amplitude must be matched and, preferably, the load shared equally. This is
normally done in the industry with common synchronization and load share signals, but this method compromises
system integrity to a single fault in the common circuits. The 827e inverters are totally independent, connected only by
the common AC bus. This design allows inverters to hot plug, which is critical to no-break maintenance and upgrade.
HERE IS HOW IT WORKS:
Figure 23 shows Inverter One running in the shelf and powering the load. The Inverter One voltage is shown on Ch1,
and its current is on Ch4. Then Inverter Two is plugged into the shelf. The Inverter Two output relay is open and
stays open until the Inverter Two voltage phase synchronizes with the Inverter One voltage phase. After they
synchronize, they lock together and then the output relay of Inverter Two closes. The current sharing and
synchronization circuit starts working and Inverter Two takes half of the load current as shown in the figure below.
The Inverter Two current is on Ch3. Current sharing and synchronization features are implemented within each
inverter, without the use of inter-inverter signaling. This avoids the single point of failure created when inter-inverter
signaling is used.
Figure 23 Paralleling and Hot Insertion
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Considerations for Multiple-Shelf Systems
Up to four inverter shelves may be installed as a system with their AC outputs paralleled to provide higher current
capacity. In creating such a system there are several aspects to recognize and consider.
•
Each shelf must be complete with a System controller, a Distribution Disconnect Module (with Distribution
Monitor), and at least one Inverter.
•
Each shelf needs to contain the same (or similar) number of inverters. This is to balance the load current across
all of the shelves.
•
Each shelf must have its SHELF # setpoint set to a unique value (1-4).
•
Each shelf operates independently, as far as setpoints, control, alarms and remote communications are
concerned. The System Controller in each shelf
•
The Plant Status values shown on the LCD of a System controller apply only to that shelf.
•
The setpoint values entered into a System controller apply only to that shelf. This includes the setpoints for
“# REDUNDANT IMs” and “% of CAPACITY.”
•
The AC output of all inverters in a multi-shelf system must be connected together for the shelves to be able to
supply AC power to the same distribution and have their output waveforms phase-synchronized. To prevent
damage to inverters the proper power-up sequence must be followed. See Shelf Turn On and Operational
Checkout.
•
The alarm setpoints for AC voltage, AC current and DC voltage must be set the same on all shelves.
•
Each System controller must be equipped with its optional modem and phone line for remote communication
to take place with that shelf.
WARNING:
CAUTION:
AC power will feed back to all shelves and to loads from any operating inverter via the parallel
connection of shelf outputs. Extreme caution must be exercised in installation and maintenance of
multiple shelf systems.
Damage to inverters may occur if a shelf in a multi-shelf configuration does not have a functioning System
controller module or if an improper power-up sequence is followed.
Follow the sequence in the Shelf Turn On and Operational Checkout section when turning on a shelf.
Never close a shelf’s output breaker with the shelf already powered unless there is a functioning System
Controller in the shelf and the shelf’s inverters are indicating STANBY mode (amber LED is on).
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Troubleshooting
Troubleshooting of the system is limited to performing the start-up and operational checks. If further assistance is
required, contact the GE Field Service at the numbers listed in the front matter of this manual.
Whenever a malfunction occurs, the first step must be a good physical inspection of the system. Try to find out whether
the malfunction is caused by the system or by its environment (e.g. temperature, humidity or load). In addition, there
may be other situations such as:
•
Input Voltage is missing/ not at the correct level.
•
Input and Output connections are not securely fastened.
•
Connectors are not secure.
•
Blown fuses.
•
Tripped circuit breakers.
Always check these external factors before concluding that your system is faulty. If, for instance, the unit stops due to
overheating it may have been overloaded, the ambient temperature may be too high, the ventilation slots could be
blocked or a cooling fan may be out of order.
It is possible that a voltage setting for the plant was inadvertently set incorrectly. To ensure this is not the problem,
return the system to its factory default settings. Refer to the Adjusting Setpoints section for setpoint defaults and
adjustments.
To verify that the system is correctly cabled, refer to the Mechanical Installation and Electrical Connections sections.
System Controller Status (STAT) screens provide information useful in troubleshooting.
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Single Inverter Fail
O
Multiple Inverter Fail
O
Inverter High Temperature
O
Inverter Communication Loss
O
Inverter Hi DC Rail V
O
Inverter Calibration Loss
Inverter Lo DC Input Voltage
O
O
O
O
F
O
F
O
O
O
O
O
O
O
F
O
O
O
O
O
O
Inverter Lo Output Voltage
O
O
O
O
O
Inverter Hi Output Voltage
O
O
O
O
O
Inverter Hi Peak Output Current
O
O
O
O
F
O
O
Inverter Hi RMS Output Current
O
O
O
O
F
O
O
Inverter Hi Crest Factor
O
O
O
O
F
O
Inverter Frequency Lock Fail
O
O
O
F
O
Inverter Output Fuse Fail
O
O
O
O
O
Plant Voltage Alarm
O
O
O
Δ
Δ
O
Plant Hz Alarm
O
O
O
O
O
Plant Load Alarm
O
O
O
O
O
O
O
DDM CB1 Open
O
O
DM Bias Fail
O
O
Battery Voltage Alarm
O
O
AC Dist Mod Calibration Loss
O
O
O
O
Δ
O
O
O
Force Inverter to Standby
O
O
O
O
O
O
O
Lo or Hi Output Voltage
O
O
O
System Controller Fail
Distribution Controller Fail
O
Notes
K4 - spare
Plant Load
Minor
Major
Fail
O
Standby
Minor
O
Alarm Relay
O
16
O
OK (green)
O
Inverter
15
LED
OK (green)
Normal Operation
Major
Controller (green)
Condition
System
Controller
LED
DM LED
Table 11 Troubleshooting - Alarm Conditions
Inverters Auto-Standby if enabled
O
Δ
O
Lo DC Input Voltage
O
O
O
O
O
O
O
O
Force Multiple Inverters to Standby O O
O
O
O
Symbols: O = ON LED or Activated Alarm Relay, F = FLASHING LED, Δ = possible ON LED
Conditions column indicates primary condition, other conditions may also be active.
NOTE: This table applies on a per shelf basis.
15
Inverter LEDs activate only on Inverters with the specific conditions.
16
CB1 AC Load Disconnect on the Distribution Disconnect Module is also referred to as “Plant Breaker”.
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Table 12 Troubleshooting - Corrective Actions
Condition
Possible Cause
System Controller (green) LED OFF Lo input voltage
Distribution Module (DM) OK LED
OFF
Corrective Action
1.
2.
Failed Controller
Replace System Controller
Lo input voltage
1.
2.
DDM CB1 OPEN
Verify DDM CB1 is CLOSED.
Clear load fault if necessary.
System Controller
Fail
See System Controller (green) LED OFF above.
DM Bias Fail
Replace Distribution Module.
Failed DM
Replace Distribution Module.
Inverter Fail LED FLASH - 1 Inverter Communication
Loss Inverter
initialization
incomplete
Hi Temperature
1.
2.
Hi Peak Output
Current
1.
Hi Crest Factor
1.
2.
2.
Clear any air flow blockage at front and rear of inverter.
Reduce ambient temperature to within specified
operating limits.
Replace Inverter.
Examine Inverter currents
menu path: INV > Inv # > STAT
If current is much higher than currents on other
Inverters Replace Inverter.
Examine Inverter currents
menu path: INV > Inv # > STAT
If crest factor is much higher than on other Inverters
Replace Inverter.
Hi RMS Output
Current
3.
Frequency Lock
Fail
Replace Inverter
Inverter
Calibration Lost
Replace Inverter
4.
Examine Inverter currents
menu path: INV > Inv # > STAT
If current is much higher than currents on other
Inverters Replace Inverter.
Communication
Replace System Controller
Loss System Controller
Failed or Removed
Communication
Loss Distribution
Monitor or
Distribution
Disconnect
Module Failed or
Removed
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Verify DC input fuses or circuit breakers not cleared.
Restore input voltage to Inverters to within operating
range.
Wait for initialization to complete.
3.
Inverter Fail LED FLASH - all
Inverters
Verify DC input fuses or circuit breakers not cleared.
Restore input voltage to Inverters to within operating
range.
Replace Distribution Monitor or Distribution Disconnect
Module.
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Table 12 Troubleshooting - Corrective Actions
Condition
Inverter Fail LED ON - 1 Inverter
Inverter Fail LED ON - All Inverters
Possible Cause
Corrective Action
Hi RMS Output
Current
Excessive Load
1. Verify Excessive VA load
menu path: PLANT > STAT > PLANT LOAD
2. Examine Plant Load
menu path: PLANT > STAT > PLANT KVA
3. Compare Plant Load to On-Line Inverter Capacity
4. Add Inverters or reduce load.
Hi Peak Output
Current
Excessive Peak Load
1. Verify non-Excessive RMS load
menu path: PLANT > STAT > PLANT LOAD
2. Add Inverters or reduce load.
Hi Crest Factor Load Crest Factor
Excessive Load Crest Factor
1. Examine Load Voltage and Load Current waveforms with
an oscilloscope.
2. If Voltage waveform is normal and current waveform is
“peaky”, the load is excessively non-linear.
3. Consult with Technical Support for further assistance.
Hi Crest Factor Distorted Inverter
Waveform
Excessive Load Crest Factor
1. Examine Load Voltage and Load Current waveforms with
an oscilloscope.
2. If Voltage waveform and current waveforms are “peaky”,
the Inverter voltage waveform is suspect.
3. Consult with Technical Support for further assistance.
Hi Temperature
1.
2.
Clear any air flow blockage at front and rear of inverters.
Reduce ambient temperature to within specified
operating limits.
Lo input voltage
1.
2.
Verify DC input fuses or circuit breakers not cleared.
Restore input voltage to Inverter to within operating
range.
Failed Inverter
Replace Inverter.
Lo input voltage
1.
2.
Verify DC input fuses or circuit breakers not cleared.
Restore input voltage to Inverters to within operating
range.
Lo Output Voltage Excessive Load
1. Verify Excessive VA load
menu path: PLANT > STAT > PLANT LOAD
2. Examine Plant Load
menu path: PLANT > STAT > PLANT KVA
3. Compare Plant Load to On-Line Inverter Capacity
4. Add Inverters or reduce load.
Hi Output Voltage Hi output voltage only occurs when sufficient Inverters have
failed with hi output voltage, to power the total load.
In this case, all Inverters will detect Hi Voltage and shut
down. The system is either cycling ON - OFF - ON… or latched
OFF.
NOTE: This procedure will result in loss of power to the load
unless load
1.
Disconnect loads from the 827e SYSTEM:
A. With Maintenance Bypass Switch (MBS) - Operate the
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Table 12 Troubleshooting - Corrective Actions
Condition
Possible Cause
Corrective Action
MBS to the UTILITY position.
B. Without MBS
NOTE: The following procedure will result in loss of
power to the load unless load.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
Inverter Standby LED ON
Controller Minor LED ON
Turn OFF all load circuit breakers to disconnect all
loads from the system.
Turn OFF CB1 on the Distribution Disconnect Module of
all shelves.
Turn ON CB1 of one shelf.
Observe whether operation is normal or over voltage.
Turn OFF CB1.
Repeat for steps 3 through 5 for each shelf, individually.
Remove all Inverters from a shelf observed in step 4 as
over voltage.
Insert one inverter.
Observe whether operation is normal or over voltage.
Remove the Inverter.
Repeat steps 8 through 10 for each inverter in the shelf
Repeat from step 7 for each shelf.
Replace failed Inverters observed as over voltage in step
4.
Reinsert all inverters.
Operate MBS to THE INVERTER position
or
Turn ON all load circuit breakers to reconnect all loads to
the system.
Turn ON system per the Shelf Turn On and Operational
Checkout section.
Initialization in
process
Wait for initialization to complete.
Manual Standby
Manually return the Inverter Mode to RUN.
menu path: INV > Inv # > CTRL > INV MODE - RUN > ACCEPT
CB1 AC Load
Disconnect OPEN
Close CB1.
Clear load fault if necessary.
Failed Inverter
Replace Inverter.
Plant Frequency
DM Frequency Error may cause a false Plant Hz Fault.
Inverter Frequency Error may cause a Plant HZ Fault and
Inverter Frequency error.
DM Frequency Error Determination:
1.
2.
3.
4.
5.
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Confirm Plant HZ Alarm
menu path: PLANT > STAT > PLANT HZ > FAULT
Check Plant Frequency
menu path: PLANT > STAT > PLANT HZ
Check Inverter Frequency of each Inverter
menu path: INV > Inv # > STAT > FREQUENCY
Check Output Frequency with an accurate, calibrated
meter.
If all Inverter FREQUENCYs and measured Output
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Table 12 Troubleshooting - Corrective Actions
Condition
Possible Cause
Corrective Action
Frequency are 60 ±0.2Hz
Replace the DM.
Otherwise, proceed.
Inverter Frequency Error Determination:
NOTE: This procedure will result in loss of power to the load
unless load
6.
Disconnect loads from the 827e SYSTEM:
A. With Maintenance Bypass Switch (MBS) - Operate the
MBS to the UTILITY position.
B. Without MBS
NOTE: The following procedure will result in loss of
power to the load unless load.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
System Controller Displaying
"XXX"
Alarm Display
"15 CAL TABLE/S"
Inverter not Recognized
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I2C bus fault
Turn OFF all load circuit breakers to disconnect all
loads from the system.
Turn OFF CB1 on the Distribution Disconnect Module of
all shelves.
Turn ON CB1 of one shelf.
Observe whether operation is normal or Plant Hz Fault..
Turn OFF CB1.
Repeat for steps 3 through 5 for each shelf, individually.
Remove all Inverters from a shelf observed in step 4 as
Plant Hz Fault..
Insert one inverter.
Observe whether operation is normal or Plant Hz Fault..
Remove the Inverter.
Repeat steps 8 through 10 for each inverter in the shelf
Repeat from step 7 for each shelf.
Replace failed Inverters observed as Plant Hz Fault in
step 14.
Reinsert all inverters.
Operate MBS to THE INVERTER position
or
Turn ON all load circuit breakers to reconnect all loads to
the system.
Turn ON system per the Shelf Turn On and Operational
Checkout section.
1.
2.
Check ribbon on back of shelf.
Unseat one inverter at a time to see if inverter is
crashing I2C bus.
1.
Verify current on each inverter.
If a module is not load sharing replace it.
If inverters are load sharing, replace DM.
Try another inverter in slot.
Verify address jumpers on inverter slot back-plane.
2.
1.
2.
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Table 12 Troubleshooting - Corrective Actions
Condition
Output Voltage Display Value
Twice or Half of Actual Voltage
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Possible Cause
1.
Distribution
Disconnect
Module backplane
JP1 jumper
incorrect
Corrective Action
Verify JP1 at upper right rear of Distribution Disconnect
Module back-plane.
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827E Modular Inverter System ProductManual
Safety
Safety Statements
Please read and follow all safety instructions and warnings before installing, maintaining, or repairing the equipment.
Refer to individual equipment product manuals for additional safety statements specific to other equipment being
installed, removed, or replaced.
See the Specifications section for equipment specific
•
Safety Compliance information
•
Installation Area Limitations
•
Environmental Limitations
•
Do not install this equipment over combustible surfaces.
•
For installations in the U. S. or Canada, use Listed/Certified compression connectors to terminate Listed/Certified fieldwire conductors where required. For all installations, apply the appropriate connector to the correct size conductor as
specified by the connector manufacturer, using only the connector manufacturer’s recommended or approved tooling
for that connector.
•
If the proper connector for the country of installation is not provided, obtain appropriate connectors and follow
manufacturer’s requirements and all local requirements for proper connections.
•
Follow all national and local rules and regulations when making field connections.
•
Torque electrical connections to the values specified on labels or in the product documentation.
•
DC output cables must be dressed to avoid damage to the conductors (caused by routing around sharp edges or
routing in areas where wires could get pinched) and undue stress on the connectors.
•
External protectors (fuses or circuit breakers) must be sized as required by the National Electric Code (NEC) and/or
local codes. Refer to the equipment ratings to assure current does not exceed:
Continuous Load (List 1) - 64% of protector rating
Maximum Load (List 2 - typically end of discharge) - 80% of protector rating.
•
Insulation on field-wired conductors must be rated no less than 90° Celsius. Size conductors based on listed
recommendations. Wiring internal to enclosed equipment cabinets must be rated at 105° Celsius (minimum).
Provide an accessible AC disconnect/protection device to remove AC power from the equipment in the event of an
emergency. This device must open all poles and be connected together.
•
Alarm contacts are not fused within the equipment. Current limiting protection for these contacts must be provided
by external circuits. Exceeding these maximum ratings could result in fire or damage to the unit. See the
Specifications section for alarm contacts ratings.
•
In enclosed equipment cabinets, the equipment chassis must be connected directly to the cabinet AC service
ground bus. For applications in huts, vaults, and central offices, the equipment chassis must be connected to the
system bonding network.
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Warning Statements and Safety Symbols
The symbols may sometimes be accompanied by some type of statement; e.g., “Hazardous voltage/energy inside, or
Risk of injury. This unit must be accessed only by qualified personnel.” Signal words as described below may also be
used to indicate the level of hazard.
DANGER
Indicates the presence of a hazard that will cause death or severe personal injury if the
hazard is not avoided.
WARNING
Indicates the presence of a hazard that can cause death or severe personal injury if the
hazard is not avoided.
CAUTION
Indicates the presence of a hazard that will or can cause minor personal injury or
property damage if the hazard is not avoided.
This symbol identifies the need to refer to the equipment instructions for important
information.
These symbols (or equivalent) are used to identify the presence of hazardous AC mains
voltage.
This symbol is used to identify the presence of hazardous AC or DC voltages. It may also
be used to warn of hazardous energy levels.
One of these two symbols (or equivalent) may be used to identify the presence of
rectifier and battery voltages. The symbol may sometimes be accompanied by some
type of statement, for example: “Battery voltage present. Risk of injury due to high
current. Avoid contacting conductors with uninsulated metal objects. Follow safety
precautions.”
One of these two symbols may be used to identify the presence of a hot surface. It may
also be accompanied by a statement explaining the hazard. A symbol like this with a
lightning bolt through the hand also means that the part is or could be at hazardous
voltage levels.
This symbol is used to identify the protective safety earth ground for the equipment.
This symbol is used to identify other bonding points within the equipment.
This symbol is used to identify the need for safety glasses and may sometimes be
accompanied by some type of statement, for example: “Fuses can cause arcing and
sparks. Risk of eye injury. Always wear safety glasses.”
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Precautions
When working on or using this type of equipment, the following precautions must be noted:
•
Install, service, and operate this equipment only by professional, skilled and qualified personnel who have the
necessary knowledge and practical experience with electrical equipment and who understand the hazards
that can arise when working on this type of equipment.
•
The equipment may be powered by multiple AC inputs. Ensure that the appropriate circuit protection device for
each AC input being serviced is disconnected before servicing the equipment.
•
Do not disconnect permanent bonding provisions unless all AC inputs are disconnected.
•
Batteries may be connected in parallel with the output of the rectifiers. Turning off the rectifiers will not
necessarily remove power from the bus. Make sure the battery power is also disconnected and/or follow safety
procedures while working on any equipment that contains hazardous energy/voltage.
•
High leakage currents may be possible on this type of equipment. Make sure the equipment is properly safety
earth grounded before connecting power.
•
Exercise care and follow all safety warnings and practices when servicing this equipment. Hazardous energy and
voltages are present in the unit and on the interface cables that can shock or cause serious injury. When
equipped with ringer modules, hazardous voltages will be present on the ringer output connectors.
•
Use the following precautions in addition to proper job training and safety procedures:
•
•
Use only properly insulated tools.
•
Remove all metallic objects (key chains, glasses, rings, watches, or other jewelry).
•
Wear safety glasses. Fuses can produce sparks. High energy levels on buses and distribution components
can produce severe arcing.
•
Test circuits before touching.
•
Lock out and tag circuit breakers/fuses when possible to prevent accidental turn on.
•
Be aware of potential hazards before servicing equipment.
•
Identify exposed hazardous electrical potentials on connectors, wiring, etc. (note the condition of these
circuits, especially wiring).
•
Use care when removing or replacing covers; avoid contacting circuits.
Electricity produces magnetic fields that can affect implanted medical electronic devices, such as pacemakers. The
strength of the magnetic field depends on the amount of current in the circuit, as well as other conditions (such as
number of conductors, placement, and distance from the conductor). DC power and distribution systems,
including batteries, which are typically used in telecommunications utility rooms, can operate at high current
levels. Personnel with electronic medical devices need to be aware of their restrictions when working around
electricity.
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Revision History
Issue 30
Added 240 Vac (inverter, shelves, and systems) and enhanced Troubleshooting section.
Issue 31
Updated Inverter Minimum Start-up Voltage Specifications.
Issue 32
Added Special room cooling note in Specifications, updated Troubleshooting section, reformatted.
Issue 33
Added note to not reinsert a module with LEDs ON.
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