GE Energy
Digital Energy
Zenith Energy Commander
Paralleling Switchgear
Application Guide
GE Energy – Digital Energy
Zenith Energy Commander
Paralleling Switchgear
• Flexibility
Introduction
Increased Reliability
• Increased
Reliability
Paralleling is an operation in which multiple
power sources, usually two or more generator
sets, are connected and synchronized to a
common bus (same parameters in regards
to frequency, phase angle, etc.).
• Uninterruptible
Maintenance
Why Zenith Energy Commander?
Systems in which part of the load is very
critical may be best served by paralleling
one or more generator sets. Under parallel
operation all the generator sets are started
at once. The first set to reach the proper
parameters will assume the most critical
portion of the load, with the remaining sets
picking up lower priority loads. In addition,
by using a load shedding application, the
failure of one generator set will not interrupt
power to the critical loads, as less critical
loads can be shed.
• Cost Savings
• Scalability
• Proven Experience
• World-Class
Global Service
Zenith Energy Commanderprovides customer
facilities with reliable power switching systems.
Since the inception of paralleling switchgear
(PSG), many successful Energy Commander
installations have been supplied with a focus
on providing reliability.
Zenith Energy Commander has evolved and
adapted to the changing technologies in
engine generator design, switchgear controls
and monitoring systems. It reflects GE’s
continuing commitment to reliable solutions
for critical power applications.
Why Parallel?
Information contained in this application guide is based
on established industry standards and practices. It is
published in the interest of assisting in the preparation of
plans and specifications for medium and low voltage
paralleling switchgear. Neither the General Electric Company
nor any person acting on its behalf assumes any liability
with respect to the use of, or for damages or injury
resulting from the use of any information contained in
this application guide. This guide should be considered a
supplement and should be used in conjunction with the GE
Switchgear medium and low voltage application guides.
There are several advantages to employing
PSG in an electrical design, such as flexibility,
increased reliability, ease of uninterruptible
maintenance and application/operation cost
savings. It is because of these advantages
that PSG has become one of the best choices
for meeting today’s power requirements.
Flexibility
Paralleling power sources allows for a wide
variety of choices in the generation, distribution and utilization of the system’s power.
Uninterruptible Maintenance
When one engine - generator set is out of
service for maintenance or repair, having
others synchronized on the same bus can
provide the needed back-up power, should
an outage occur.
Cost Savings and Scalability
Savings can be realized on the application
when a number of smaller sets would be
less expensive than one large set or when
the load makes it impractical to divide into
several sections, each with it’s own generator.
Also, when it is anticipated that the load
will grow significantly in the future, the
capital investment can be reduced by
starting with small sets and paralleling
additional units as load increases dictate.
Zenith Energy Commander Paralleling Switchgear
System Applications
Emergency or Standby Power
> Features
> Configuration Example
The emergency system is used to supply power
to building loads during a power failure.
Paralleling switchgear controls the system
transfer to generators and return back to
normal sequences of operations.
Generator
Generator
Paralleling switchgear controls the addition of
load on/off generators (load add/shed).
Transfers between utilities and generators occur
in open transition or passive momentary closed
transition (no active synchronization of sources).
> Components
System typically consists of paralleling switchgear
product and automatic transfer switch or auto
throw-over products
ATS
Emergency
ATS
Emergency
> Sequence of Operation
1. Utility fails.
Figure 1
Multiple Gen Sets, No Utility Transfer Control with ATS’s
2. ATS’s (or ATO’s) send start signal to PSG
3. Generators start and parallel to bus.
4. PSG Controls the ATS’s transfer to paralleled
generators. (load add)
5. PSG controls optimization of generators.
(shutting off and starting generators as needed)
6. PSG controls load shed operation. (shutting off
loads and/or ATS/ATO devices non-critical if
generators become overloaded)
7. Utility returns.
8. ATS transfers back to utility (open transition...
lights blink, or momentary closed transition...
lights stay on, depending how ATS is configured)
9. Generators shut down.
10. Peak shave often used to send non-emergency
start to system to transfer ATS or ATO devices
onto generators to “shave” load off the utility.
Page 1 • TB-2103
Zenith Energy Commander Paralleling Switchgear
System Applications
Prime Power
Parallel with Utility
> Features
> Features
On-site prime power systems are most often
used where there is no utility source available.
The required electricity is generated entirely on-site,
typically at facilities such as island resorts, mines,
mills or other remote locations.
Since utility is not available in prime power systems,
ATS’s/ATO’s and utility/tie breakers are not required.
> Components
Generators are the only source of power. The
system typically consists of PSG product with
no ATS/ATO products.
> Sequence of Operation
1. System enable signal causes generators
to start and parallel to bus.
2. PSG controls optimization of generators.
(shutting off and starting generators as needed)
3. PSG controls load shed operation.
(shutting off loads non-critical if
generators become overloaded)
4. PSG controls frequency of generators
for clock/time correction.
5. Removing system enable signal will
shutdown the generators.
> Configuration Example
Parallel with utility systems are utilized whenever
generators are to be actively synchronized
and paralleled with utility sources for short
or long durations.
These systems are often also used for standby use.
PSG controls the generators transfer operations
with the utility source(s) as well as the power
management (loading controls) to direct power
the appropriate direction.
Transfers may occur in short duration (momentary
closed transition), a somewhat longer duration
(softload/unload closed transition), or a sustained
duration (maintained parallel with utility).
Power management in maintained parallel situations
includes controlling import levels from utility, export
levels to utility, or base load levels where generators
are loaded to set amount disregarding the import
and export contribution from utility.
“Co-generation” is often used for maximizing generator
efficiency with heat recovery systems.
> Components
System combines generators with utility sources.
It typically consists of PSG product which controls
the ATS/ATO operations.
> Peak Shave Example
Generator
kW
Generator
Non-Purchased Power
Generator
OFF
ON
kW Demand Threshold
Utility
Purchased Power
8
Load
Load
Figure 2
Multiple Gen Sets, No Utility Transfer Control
TB-2103 • Page 2
9
10
11
12
Noon
1
2
3
4
5
6
7
Time
8
Zenith Energy Commander Paralleling Switchgear
System Applications
Sequence of Operation
1.
Utility
When used for standby, the PSG
operates in the same manner
as the emergency standby
sequence. If not used for standby,
the generators remain offline
when utility is not present.
2.
Non-emergency start signal is sent
to PSG for peak shave or exporting
power to utility applications.
3.
Generators start and parallel to bus
and with utility.
4.
PSG controls the transfer of loads
off the utility onto the generators
in momentary closed transition (if
emergency standby is also utilized)
or softload closed transition.
5.
> Configuration Examples
In maintained parallel with utility
applications, the PSG controls the
amount of import power from utility,
export power to utility, or base loads
the generators to a fixed amount
non-dependent upon the utilitysupplied power. With emergency
standby applications not maintaining
paralleling with utility, the PSG in this
case controls the synchronizing of
generators with utility and momentary
closed transition transfer onto the
generator bus.
6.
PSG controls optimization of generators (shutting off and starting
generators as needed).
7.
PSG controls load shed operation if
emergency standby is also utilized.
8.
Non-emergency start signal is removed.
9.
PSG controls the soft unload of
generators off the utility or momentary closed transition from utility if
emergency standby is utilized.
Generator
Generator
Generator
Generator
Utility
Load
Load
Figure 4
Multiple Gen Sets, Utility Main
Transfer Control (M)
Load
Load
Figure 3
Multiple Gen Sets, Utility and
Generator Main-Tie Transfer Control
Generator
Generator
Utility
Load
Figure 5
Multiple Gen Sets, Utility and Generator
Main-Tie’s Transfer Control (M-T) and
Utility M-T-T-M Operations
Utility
Load
Load
Load
10. Generators shut down.
Utility
Generator
Generator
Figure 6
Multiple Gen Sets, Utility and Generator
Main-Tie’s Transfer Control (M-T) and
Utility M-T-M Operations
Generator
Utility
Load
Utility
Load
Figure 7
Single Gen Set, Utility with
Gen/Utility Breaker Transfer Control
Load Load
Load Load
Page 3 • TB-2103
Zenith Energy Commander Paralleling Switchgear
Protection Schemes
Standby
Gen
> Example – Low Voltage
Gen
EE
Figure 8
This is a back-up power scheme for a
low voltage application. Includes current,
potential and control power transformers,
and circuit breakers with built-in overcurrent protection. This scheme includes:
EE
50/51
N/G
40 25
32
CT
Typical
27/59
81
• Load Shed
PT
• Under/Over Voltage
CPT
CPT
• Reverse Power
PT
81 U/O
• Loss of Excitation
• Ground Over Current
LS 25
TVSS
• Under/Over Frequency
• Surge Suppression (TVSS)
Typical
ATS
• Synchronism Check
ATS
Emergency
Emergency
> Example – Medium Voltage
Figure 9
Gen
This is a back-up power scheme for a
medium voltage application. Includes
current and potential transformers and
vacuum circuit breakers without overcurrent protection. This scheme includes:
Gen
EE
EE
CT
CT
50/51
N/G
NGR
51V
40 25
32
• Load Shed
• Under/Over Voltage
• Reverse Power
87
50/51
CT
Typical
87
27/59
81
PT
SA
SA
• Loss of Excitation
PT
81 U/O
• Ground Over Current
• Instantaneous and Timed Over Current
LS 25
50/51
50/51 N/G
• Under/Over Frequency
Typical
• Differential Protection
• Surge Suppression (TVSS)
ATS
• Synchronism Check
ATS
SA
Emergency
Emergency
Example Relay Definitions
25 Synchronization – Prevents the closing of
paralleling AC currents and, if required, signals governor controls to meet the desired
match of voltage, frequency and phase angle.
27 Undervoltage – Operates when the AC voltage
drops below a preset value.
32 Directional or Reverse Power – Operates
when generator draws power from the
bus vs. supplying power to the bus. This
fault condition is also known as “motoring”.
40 Field – Operates upon excessive current
within excitation field
TB-2103 • Page 4
46 Reverse Phase or Phase Balance Current –
Operates upon the reversal of the phase
sequence in the polyphase currents or when
the polyphase currents are imbalanced or
contain negative phase sequence properties
above a given value.
47 Phase Sequence Voltage – Operates upon
a preset value of polyphase voltage in the
desired phase sequence.
50 Instantaneous Over Current – Operates
immediately upon excessive current
or excessive rate of rise in current.
51 AC Time Over Current – Operates upon
excessive current.
59 AC Overvoltage – Operates upon excessive
AC voltage past a set value.
67 AC Directional Overcurrent – Operates
on a set value of AC overcurrent in a
predetermined direction.
81 Frequency – Operates when frequency
frequency drops below or rises above
a set value.
87 Differential – A fault detecting device which
operates upon a difference in current of a
given percentage or amount.
Zenith Energy Commander Paralleling Switchgear
Protection Schemes
Parallel with Utility
> Example – Low Voltage
Figure 10
Exhaust
This is a parallel power scheme for a
low voltage co-generation application.
Includes current, potential and control
power transformers and circuit breakers
with built-in over-current protection.
This scheme includes:
Utility
Gen
• Load Shed
Gen
EE
50/51
N/G
32 25
Heat Load
EE
50/51
N/G
46
67
CT
• Under/Over Voltage
• Reverse Power
40 25
32
27/59
81 U/O
47
PT
CPT
Heat
Recovery
System
CT
Typical
27/59
81
PT
• Negative Sequence Current
CPT
CPT
• Negative Sequence Voltage
CPT
PT
81 U/O
• Loss of Excitation
• Ground Over Current
TVSS
LS 25
• Directional Over Current
TVSS
CPT
• Under/Over Frequency
Typical
25
PT
• Surge Suppression (TVSS)
Feeders
Typical
• Synchronism Check
ATS
• Interlock Schemes &
Backup Trip Protection
Emergency
> Example – Medium Voltage
Figure 11
This is a back-up power scheme for a
medium voltage application. Includes
current and potential transformers and
vacuum circuit breakers without overcurrent protection. This scheme includes:
Exhaust
Utility
Gen
• Load Shed
CT
• Reverse Power
PT
46
67
CT
50/51
N/G
NGR
SA
87
87
27/59
81
PT
SA
SA
PT
• Loss of Excitation
81 U/O
• Ground Over Current
50/51
50/51 N/G
LS 25
• Instantaneous & Timed
Over Current
50/51
50/51 N/G
50/51
50/51 N/G
• Directional Over Current
• Differential Protection
50/51
CT
Typical
• Negative Sequence Voltage
• Under/Over Frequency
Heat
Recovery
System
51V
40 25
32
27/59
81 U/O
47
• Negative Sequence Current
Heat Load
EE
CT
32 25
• Under/Over Voltage
Gen
EE
50/51
N/G
Typical
PT
25
SA
Feeders
Typical
SA
ATS
• Surge Suppression (TVSS)
Emergency
• Synchronism Check
• Interlock Schemes &
Backup Trip Protection
Example Legend
ATS
CT
CPT
EE
Automatic Transfer Switch
Current Transformer
Control Power Transformers for Breakers
Electrical Energy
LS
NGR
PT
SA
TVSS
Load Shed
Neutral Grounding Resistor
Potential Transformer
Surge Arrestor
Transient Voltage Surge Suppression
Page 5 • TB-2103
Zenith Energy Commander Paralleling Switchgear
Stack Configuration Guide
Configuration Instructions
1. After designing a system one-line, you are
now ready to layout your electrical room
using the enclosed switchgear and control
stacks configurator.
2. Based on system electrical requirements,
choose the appropriate low voltage or
medium voltage available configurations
from the stack configuration guide.
3. In an effort to minimize footprint, select the
nearest available Stack Number that meets
breaker capacities. Use remaining space for
fitting the appropriate controls as desired. The
control and breakers definitions are included
on the following pages.
4. Once the paralleling switchgear system has
been configured, please refer to the enclosed
dimension table for overall lengths, widths,
depths and weights.
TB-2103 • Page 6
Zenith Energy Commander Paralleling Switchgear
Stack Configuration Guide
1
Legend
7
Option Notes
2
A
2
Stack Number
800-1600 Amp
A
B
3
B
C
A
800-2000 Amp
1
2
2
3
2
4
2
A
5
2
A
6
2
8
A
A
A
B
800-2000 Amp
5000 Amp
B
B
32004000 Amp
C
800-2000 Amp
C
6
6
6
6
A
A
C
C
800-2000 Amp
D
800-2000 Amp
6
B
B
B
800-2000 Amp
C
8
10
3
2
2
2
A
C
A
11
12
2
A
800-2000 Amp
13
5
4
2
7
A
D
32004000 Amp
8002000 Amp
9
1
800-2000 Amp
C
5000 Amp
32004000 Amp
6
2
A
8001600 Amp
2000 Amp
7
2
7
A
B
B
B
6
B
B
800-2000 Amp
8002000 Amp
800-2000 Amp
A
8004000 Amp
B
Integrated
Control/
Low
Voltage
UL 1558
Breaker
Stacks
C
D
A
A
A
800-2000 Amp
3200 Amp
B
800-2000 Amp
2
A
800-1600 Amp
B
B
B
7
2
8
A
800-2000 Amp
C
Low or
Medium
Voltage
Separate
Control
Stacks
A
Compartment
8
2
3
A
800-1600 Amp
A
800-2000 Amp
Integrated
Control/
Low
Voltage
UL 891
Breaker
Stacks
2
4
800-1600 Amp
B
8002000 Amp
B
C
B
800-1600 Amp
C
800-2000 Amp
1
C
C
B
800-2000 Amp
B
8004000 Amp
25003000 Amp
8001600 Amp
D
800-2000 Amp
D
2
3
C
D
8002000 Amp
800-1600 Amp
D
800-2000 Amp
4
A
800-2000 Amp
6
7
8
7
A
12003000 Amp
C
800-1600 Amp
5
A
12003000 Amp
C
E
800-2000 Amp
A
A
1200 Amp
A
600 Amp
A
B
B
B
C
C
B
A
Medium
Voltage
Breaker
Stacks
B
B
12003000 Amp
C
C
12003000 Amp
B
12003000 Amp
C
1200 Amp
600 Amp
Page 7 • TB-2103
Zenith Energy Commander Paralleling Switchgear
Stack Configuration Guide
Low or Medium Voltage
Separate Control Stack Options
Full Stack
Description
Generator Control Compartment
System/Master Control Compartment
Utility Transfer Control Compartment
Automatic Throw-over Transfer Control Compt.
Annunciator/Mimic Panel Control Compartment
Remote Annunciator Control Section
Comp
A
A
A
A
A
A
Half Stack
Stack
1
1
1
1
1
3
Comp
A, B
Stack
2
A, B
A, B
A, B
A
2
2
2
3
NOTE: System Master control compartment should be located in an “A” compartment
See suggested control compartment options for component details.
Integrated Control/
Low Voltage Stack Options
Description
Blank Auxiliary Compartments for Controls
Utility, Generator & Feeder Breaker
Compartments
Tie Breaker Compartments
UL 1558
Up to 5000 Amps
UL 1558
6000 Amps
UL 891
Up to 6000 Amps
Comp
A
B
Stack
1, 2, 4
7
Comp
A3
A4
Stack
8, 9
11
Comp
A3
B
Stack
1, 2
7, 8
B
B, C
B, C
B, D
A, C
B5
B
B, C
B, C
B, D
A, C
1, 2, 3
4
5
6
7
1, 2, 3
1, 2, 3
4
5
6
7
B
B, C
B, C
B, D
8, 9, 10
11
12
13
B3
B
B, C
B, C
B, D
8, 9, 10
8, 9, 10
11
12
13
B
B, C
B, C, D
B, C, D, E
A, C
B3
B
B, C
B, C, D
B, C, D, E
A, C
1
2, 3
4, 5
6
7, 8
1
1
2, 3
4, 5
6
7, 8
NOTES:
1. All stacks with bussing must be the same depth
2. Use 74" depths in lieu of 67" when cable sizes exceed 9100A for 3-wire systems, 6000A for 4-wire systems. All breakers are thru the door.
3. If bus-bus tie breaker is required in a stack, no other breakers are allowed
4. All breakers are thru the door type at depths of 60", use 70" depths in lieu of 60" when cable sizes exceed 9100A for 3-wire systems, 6000A for 4-wire systems
5. 22" width not available if controls are inserted
6. Stack will be limited to 2 multifunction protective relays
7. PT's are included in rear for source/transfer breakers and main buses: (2) in open delta or (3) in wye connection depending on 3 wire or 4 wire systems respectively
as default (3) available if specified
8. Insulated/Isolated and compartmentalized bus options available 4000A and below
Medium Voltage Stack Options
Control/Auxiliary
Comp
Stack
A
4, 5
B
6, 7, 8
B, C
2
A, B
3
A, C
8
Utility, Generator,
Feeder Breaker
Comp
Stack
A, B
1
A
2
C
3
B
5
A, C
7, 8
Tie Breaker
Comp
Stack
B2,3
1
A, B
1
A
2
C
3
B
5
A, C
7, 8
NOTES:
1. All stacks with bussing must be the same depth
2. If figure 2 is being used for tie, then either figure 3 or 4 must be placed on one
of the sides of the tie stack
3. If figure 3 is being used for tie, then either figure 2 or 4 must be placed on one
of the sides of the tie stack
4. Front-draw-out PT's are included for source/transfer breakers and main buses:
(2) in open delta or (3) in wye connection depending on 3 wire or 4 wire systems
respectively as default (3) available if specified
5. Stack for 5KV class 100MVA only. (1) top drawout PT and (1) rear fixed PT available
for source/transfer breakers
Breaker & Control Compartment Definitions – Page 15
TB-2103 • Page 8
Zenith Energy Commander Paralleling Switchgear
Stack Configuration Guide
Stack Application Notes:
1. Dimensions and weights shown are in inches
and pounds respectively.
2. Application information is based on GE’s design
specification
3. All dimensions and weights are approximate and
subject to change without notice. Information
should be used for reference only and not used
for construction until issuance of approval drawings.
4. For additional application data, please reference
“switchgear” on GE’s website or contact your local
sales representative.
5. Low voltage 8000A main bus or higher applications
are available but will require factory assistance.
Contact your local sales representative for these
special applications.
6. All breaker stacks are based on utilizing electrically operated draw-out style circuit breakers.
7. Breaker stacks contain the utility breakers, generator
breakers, tie breakers, and feeder breakers
according to the appropriate system 1-line.
8. The UL 1558 breaker stacks are based on using
GE WavePro circuit breakers.
9. The UL 891 breaker stacks are based on using
GE Power Break II circuit breakers.
10. The Medium voltage breaker stacks are based
on using GE Power Vac vacuum circuit breakers.
11. Generator control compartments will be required
for every generator to be controlled by GE in the
PSG system.
12. Master/System control compartments will be required
for every PSG job paralleling multiple generators.
13. Master/System control is based on all generators
paralleling onto a single main bus. Systems with
tie breakers between generators are assumed
to always be closed with system in manual
whenever generator tie(s) are open.
16. ANN annunciator/mimic panel may be utilized
for dedicated compartment display of system
1-line graphical LED display.
17. RAN remote annunciator may be utilized for
duplication of PSG status and alarming indications
remote from PSG.
18. When control compartments are to be inserted
into breaker stacks (breaker and control cubicles),
blank auxiliary compartments will be required in the
breaker cubicles for housing these control compartments.
19. Dimensional information is based on NEMA 1, front
and rear access, seismic zone 2, top or bottom cable
entry. Contact factory for bus duct applications.
20. Operating temperatures based on 0° C up to 40° C
(indoor) and -20° up to 40° C (outdoor) and elevations
up to 2000m for LV and 1000m for MV.
21. Additional references: ANSI/IEEE, NEMA, NFPA, NEC,
UL , IEC, CSA.
22. All cubicle sizes are based on using wiring terminal
blocks for bare wire. If wire lugs are required,
consider as high option layouts.
23. Door meters, CT circuits, and main DC power circuits
are equipped with ring type terminal blocks and lugs.
24. Control power on Medium voltage multiple Gen.
systems are (-) ground 24VDC for controls, 125VDC
(48VDC optional) for breaker tripping, closing and
charging and relays.
25. Control power on multiple Gen. low voltage
systems are (-) ground 24VDC for controls,
relays, and breaker tripping, and 120VAC for
breaker closing and charging.
26. Control power on Medium voltage single Gen/utility
ATO systems are (-) ground 24VDC for controls/
relays, 120VAC for breaker tripping, closing and
charging (capacitive trip). (120VAC UPS when no
24VDC is available)
14. Utility transfer control compartment will be required
for every utility source/breaker(s) to be controlled
in PSG system.
27. Control power on low voltage single Gen/utility
ATO systems are (-) ground 24VDC for controls,
relays, and breaker tripping, and 120VAC for
breaker closing and charging.
15. ATO control compartment is utilized for systems
requiring transfer control for only 1 generator
and utility source.
28. Contact factory if swing generators are required
(when one (1) generator feeds more than one (1)
generator breaker).
Page 9 • TB-2103
Zenith Energy Commander Paralleling Switchgear
Control Configuration Guide
Suggested Control Component Options
Option Type
Analog Metering
Digital Metering
Logic Controller
Communications
Eng/Util control
Protection Note 3
HMI Panel Note 10
Annunciation Notes 6,14
Lamps/Indicators Note 4
Alarm Horn
Switches/Buttons/Pots
Generator Control
Standard
AM / WM
Note 1
GE 90-30
—
SPMA, Note 15
Ind. Grade MFR Series
—
Incandescent
Breaker Open/Closed
—
3P/ECS/LTS/Reset/90S/65S/52S
Optional
VM / FM / PFM
Note 1
Note 2
—
AGLC/VAR-PFC, Note 15
Util.Grade Multilin Series
—
LED
Locked Out / Drawn Out
—
ESTOP/86/TP/BLP
Master Control
Standard
Optional
VM/FM inc / run sync
AM / WM
None
PQM
GE 90-30
Redundant GE 90-30***
Note 13
Modbus and/or Ethernet*
None
SPMA/APTL Note 17
Load Shed
—
5" Monochrome OIP
12" Color ACS**
Incandescent
LED
Note 7
Note 7
Yes
—
AUMS/LTS/Reset/HS Note 8
52S/86/TP
Relays Note 5
Trm. blocks/fuses/wire
As Required
As Required
As Required
As Required
As Required
As Required
Annunciation Notes 6,14
Lamps/Indicators Note 4
Alarm Horn
Switches/Buttons/Pots
Relays Note 5
Trm. blocks/fuses/wire
Utility Control
Standard
AM / WM
Note 1
Note 9
—
Note 15
Industrial Grade
HMI Panel Note 10
Incandescent
Bkr Open/Closed UBK,GMBK
—
LTS/Reset/52S
As Required
As Required
Optional
VM / FM / PFM
Note 1
Note 9
—
Notes 15, 16
Utility Grade
—
LED
Locked Out/Drawn Out
—
I-E/TMS/RTN/PSS/YN/86/TP
As Required
As Required
Auto Throw Over Control
Standard
Optional
AM/WM (U&G)
VM/FM/PFM
Note 1
Note 1
GE 90-30
Note 2
Modbus
Modbus & Ethernet
AGLC/VARPFC/APTL
N/A
GBK-Ind.grade, UBK-Ut.grade Full Utility Grade
5" Monochrome LCD
15" color ACS
Incandescent
LED
Bkr Open/Closed (GBK/UBK) Locked Out/Drawn Out
Yes
—
ECS/AUMS/LTS/RESET/90S/65S/52S ESTOP/86/TP/BLP/TMS/RTN/PSS/YN
As Required
As Required
As Required
As Required
Option Type
Logic Controller
Communications Note 13
HMI Panel Note 10
Annunciation Note 14
Lamps/Indicators
Alarm Horn
Switches/Buttons/Pots
Relays Note 5
Trm. blocks/fuses/wire
Mimic Panel Control, Note 11
Standard
Optional
None
GE 90-30
—
—
—
—
—
—
Note 11
Note 11
—
—
LTS
—
As Required
As Required
As Required
As Required
As Required
As Required
*** Note 13
*** Note 10
*** Note 20
Option Type
Analog Metering
Digital Metering
Logic Controller
Communications Note 13
Eng/Util control
Protection Note 3
Control Component Definitions – Page 15
TB-2103 • Page 10
Remote Annunciator Control, Note 12
Standard
Optional
None
GE 90-30
—
—
—
—
Incandescent
LED
—
—
Yes
—
LTS/HS/Reset
—
As Required
As Required
As Required
As Required
Zenith Energy Commander Paralleling Switchgear
Control Configuration Guide
Control Application Notes
1. Based on a multifunction protective relay/digital
metering, industrial grade low voltage, utility
grade medium voltage (and utility parallel).
13. BMS Communications (with isolation) based on
ethernet using OPC or over RS-485/422 using
modbus RTU.
2. Consult factory for custom logic controller
specifications.
14. Annunciator panels use green, red, amber indicators.
3. Based on protective relaying mounted in
appropriate breaker compartment. For utility
interconnection, the utility protective relay
shall be IEEE 1547 compliant.
4. Based on breaker status indication-open/closed.
GC-gen breakers, UTC-utility breakers and gen
main transfer breakers.
5. Based on control relays only. Aux relays include
engine running, summary alarm/shutdown, and
breaker status. Additional auxiliary relays for customer
use if specified may alter size. Contact factory
when additional status contacts are required.
6. Up to 36 indications for annunciation per
control section.
15. Consult factory for non-Woodward compatible
engine generator set interface and/or digital
controller requirements.
16. Parallel with utility systems will require watt
transducer inclusions at breakers requiring
synchronizing and load controls.
17. Consult factory for additional redundancy options
for user interface panel.
18. Paralleling with utility applications will require
generator controls with full stack compartments.
19. Customer supplied components can affect
footprint size and need to be considered.
20. Redundant Master PLC’s will require full stack
compartments.
7. System/Master breaker indications only for ties
between generators or load bank breakers.
8. System includes hard-wired breaker control
switches and backup switches for disabling
automatic operation and starting engines.
Backup hard-wired load control switches are
included and footprint will increase with more
than 16 load add/shed devices.
9. Utility transfer logic will be part of System/Master
controller logic unless specified as remote/ATO
operations.
10. Standard defaults are smallest HMI’s if not specified.
15", 19" or 42" available.
11. Based on supplying full compartment displaying
of graphical system 1-line representations with
(2) LED indications per device (contact factory for
stack sizing).
12. Based on supplying duplicate annunciation to
generator and system/master annunciation points
(up to 54 points for the 28/18/12 stack) (up to 108
annunciator points for the 35/26/12 stack) (up to
144 annunciator points for the 42/26/12 stack).
Dimensions
Figures
H"
Control Stacks
1-3
90
4
28, 35, 42
Low Voltage UL 1558 Stacks
1, 4, 6, 7
90
2, 3
90
5
90
8
90
9, 12
90
10
90
11
90
12
90
13
90
Low Voltage UL 891 Stacks
1-8
90
Medium Voltage Stacks
1-6, 8
95
7
90
W"
D"
Weight (lbs.)
32
18, 26
35
12
1000
200
22, 30
38
30
30
40
44
30, 40
40
30, 40
60, 67, 74
67, 74
60, 67, 74
60, 70
60, 70
60, 70
60, 70
60, 70
70
3-4000
3-4000
3-4000
3-4000
3-4000
3-4000
3-4000
3-4000
3-4000
22, 30
60, 67, 74
3-4000
36
40
94
60
35-4500
2500
Page 11 • TB-2103
Zenith Energy Commander Paralleling Switchgear
System HMI
Ease of Use & Operations
A Master HMI panel can be useful to PSG systems for user
access and monitoring. The key control and monitoring
functions in these systems include metering, annunciation, controlling breakers and engine generators
in automatic operations as well as manual.
This monitoring and control should be carefully considered
when selecting which type of HMI is best suited for
the operator and the facility. The greatest reliability in
monitoring and control functions is realized with hardwired analog meters, switches and annunciation indicators, with very limited HMI access needs by the operator.
In some cases, critical facilities may be suitable for
additional system monitoring, troubleshooting and
remote access ability. Operators in this case will require
a more advanced Master HMI in addition to the system
hard-wired meters, switches and annunciation. The
Energy Commander ACS “Advanced Control System”
is recommended for these cases.
The Energy Commander Operator Interface Panel
(OIP) is ideal for simpler systems. Since status of the
system can be viewed in front of the switchgear, including
all source metering, alarm, shutdown and status
annunciation, the operator is not required to utilize
the OIP to cycle through any screens for system control
and monitoring. The user is only required to use the
OIP touch panel for system testing purposes, noncritical settings and timing adjustments and limited
manual control redundant to the hard-wired switches.
Standard Operator Interface Panel (OIP)
> Intuitive interface makes operation simple. Little
or no learning curve required to operate system.
> A main screen with navigation buttons and
non-system critical button/switches.
> System testing screen allowing the operator
to manually initiate automatic system testing
operations.
> Generator interface settings latched into the
PLC control system upon entry.
> System load add/shed manual control
redundant to hard-wired manual control
switches in master control.
> Generator optimization settings latched into
PLC control system.
TB-2103 • Page 12
Optional Advanced Control System (ACS)
for Special Applications
> Full functions of standard OIP with the addition of
SCADA capabilities.
> Internet capable – allows remote access via web.
> Online controllable / programmable
(behind customer’s own firewall).
> Advanced Event Logging & Source Trending
allows statistical root cause analysis.
> Duplicates System & Generator Annunciation.
> Remote system diagnostics.
> Alarm and maintenance messaging, including
predictive maintenance.
> Graphical user interface. Intuitive and user-friendly.
Requires NO computer experience to operate.
> Password protection – capable of hundreds of levels
of authority.
Zenith Energy Commander Paralleling Switchgear
System HMI
HMI Features
Feature
OIP
ACS
Type
5" monochrome LCD
12", 15", 19" or 42" color LCD
Metering
—
Full analog displays VM, WM, AM, KM, PFM
Breaker Control
—
Optional
Engine Settings
Engine cranking, cool down
Engine cranking, cool down
Monitoring
Engine run-time
Engine run time, status, capacity,
engine/breaker/ATS status and metering,
1-line source/bkr status, bkr operations,
event logging, trending, communication status,
navigation help, system control help,
and optional engine parameters
Annunciation
—
Full generator, Master and Utility annunciation
matching, door-mounted, hard-wired annunciation
Security
Yes
Enhanced levels
Testing
Manual initiated
system testing
Manual initiated system testing plus 7-day
or 365-day built-in programmable exerciser
as specified
Load Add/Shed
Manual load add/shed priority
block push-buttons; logic with
priority pass-along
Manual load add/shed per load buttons,
“On-the-fly” priority settings ability,
load add/shed delay timers
Gen Optimization
Manual priority settings
or run-time based
Manual priority settings or run-time based with
drag-drop starting/stopping points, bar graph
monitoring for sequencing, on and off delay
timer settings
PSG Network Comm Status
—
Full device green/red status
Internet
—
Optional web page serving/IP address
Remote Notification
—
Optional e-mail ability thru internet for operator
Page 13 • TB-2103
Zenith Energy Commander Paralleling Switchgear
Network Architecture
Sample Control Network
• Modbus Communications with any Engine
• Configurable for BMS via RS-485, Modbus,
RTU or Ethernet EGD
• 256 Kb PLC Bus
Advanced Control System
(ACS) (Optional)
• ACS Optional
Remote Stations
• Generator Load Share Network
• Start Signals and Load Add/Shed
Hard-wired with Backup Switches
Hub
Intranet/
Internet
Operator Interface
Panel (OIP)
To
BMS
Annunciator
Lights
Master
Programming
Logic Controller
Master Control
Annunciator
Lights
Generator
Programmable
Logic Controller
Breaker
Protective
Relay
Breaker
Metering
Engine
Control
Other
Generators
Breaker
Generator Breaker & Control
Emergency
Start Signal
Automatic
Transfer Switch
(ATS)
Uninterruptible
Power Supply
(UPS)
Breaker & Control Compartment Definitions – Page 15
TB-2103 • Page 14
10 Mbps Ethernet
Modbus
Control Wiring
Genius
SNP
Load Share Network
Generator
Zenith Energy Commander Paralleling Switchgear
Definitions
Breaker Compartment Definitions
Control Component Definitions
Utility Compartment
Breaker directly fed from utility source.
86
Lockout Relay
52S
Breaker Control
65S
Speed Adjustment
90S
Voltage Adjustment
AGLC
Generator Loading Control
Utility Tie
Breaker that ties utility sources together.
AM
Ammeter
APTL
Power Transfer Control
Generator Tie
Breaker that ties generator sources together.
AUMS
Automatic/Manual Selector
BLP
Base-Load Adjustment
ECS
Engine Control
ESTOP
Emergency Stop
FM
Frequency Meter
HS
Horn Silence
IEP
Import/Export Control
LTS
Light Test
PFM
Power Factor Meter
PQM
Power Quality Meter
PSS
Peak Shave Selector
RESET
Alarm/Shutdown Reset Button
RTN
Return to Normal Selector
SPMA
Automatic Synchronizer
TMS
Transition Mode Selector
TP
Test Plug
Generator Compartment
Breaker directly fed from generator source.
Tie Compartment
Breaker in-between source breakers.
Generator Main
Breaker that ties generator and utility sources together
and used for transfer control between sources.
Feeder/Distribution Compartment
Breaker directly feeding load or feeding a device that
has mechanical interlock / separation of sources.
Control Compartment Definitions
Master/System
Used for controlling the paralleling of generators,
generator optimization, load add/shed, system status
annunciation, user HMI, and when local transfer control
is required since remote ATS’s or similar control devices
are not available.
Generator
Used when needed to start/stop generator sources,
control the voltage and speed and provide annunciation
of engine and generator status.
Utility Transfer
Used for loading control when softload/unload transfers
between utility sources and generator sources are
required in an emergency standby system and provides
transfer devices status annunciation. Also used in
maintained parallel with utility systems for controlling
power management.
Mimic Panel
Used when needed to display system one line status
of generator sources, utility sources and all distribution
and transfer devices.
VAR/PFC Reactive Power / Power Factor Control
VM
Volt Meter
WM
Watt Meter
WT
Watt Transducer
YN
Bypass to Normal Selector
Annunciator Panel
Used typically remote for annunciation of system
status conditions.
Page 15 • TB-2103
Zenith Energy Commander Paralleling Switchgear
System Example
One Line System Design
• Parallel with Utility System
Exhaust
• Co-Generation Application with Daily Peak Shave
Operation for Limiting Utility Power Import
Heat Load
Utility
Generator
Generator
Heat
Recovery
System
Description
• 2 Generators Paralleling with
Heat Recovery System
• 1 Utility Source
Feeders
• 8 Feeders to Facility Load
• Low Voltage Parallel with
Utility Protection Scheme
Switchgear Stack Layout
• 1 Gen Control & Breaker Stack for Each Generator Set
• Master Control & Gen-Main Breaker in One Stack
• 8 Feeder Breakers in Two Stacks
• Utility Control and Breaker in Stack
To BMS
Generator 1
Control
Generator 2
Control
Master
Control
Generator 2
Generator
Breaker
Generator
Breaker
Generator
Main
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Feeder
Breaker
Load
Load
Utility
Utility
Control
Utility
Breaker
Generator 1
Control Interconnections
Power Interconnections
Breaker & Control Compartment Definitions – Page 15
TB-2103 • Page 16
Zenith Energy Commander Paralleling Switchgear
System Example
Implementation
1
3
2
2
4
7
1
5
6
9
8
Outside
GE Power Breakers
1
2
3
4
5
6
7
8
9
GE Multilin Protective Relays
Annunciator Panels
Metering
GE Fanuc Advanced Control System (ACS)
Control Switches & Breaker Status Indicators
Utility
Feeder
Tie
Generator
2
Inside
1 Engine Generator Controller
2 GE Fanuc Programmable
Logic Controller (PLC)
3 Wire Hiding Raceways,
Relays, Terminal Blocks
and Power Supply
3
Breaker & Control Compartment Definitions – Page 15
1
Page 17 • TB-2103
Contact Us
We protect and connect the world’s
ensure
critical equipment to
safe, reliable power
Assembled in the USA
GE Energy – Digital Energy
830 W 40th Street, Chicago, IL 60609 USA
800 637 1738 www.gepowerquality.com
Information subject to change without notice. Please verify all details with GE.
© 2010 General Electric Company All Rights Reserved
TB-2103 (10/10)