Switchboard Meter Installation Instructions
The 9300 Series power meters are now available in the optional switchboard meter
style, compatible with either the S1 (General Electric) or the FT21 (ABB)
switchboard case. In this document, the 9300 Series switchboard meter will simply
be referred to as “switchboard meter.”
The switchboard meter consists of the meter chassis (S1 or FT21 draw-out carriage
with the meter base pre-mounted and pre-wired), the cover assembly (S1 or FT21
case cover with the display unit pre-mounted), and a ribbon cable to connect the
display to the meter base. The S1 or FT21 cases (outer shells) are also available as
separately ordered options.
This document contains instructions for installing and wiring a switchboard meter
and must be used in conjunction with the Installation and Basic Setup Instructions
manual supplied with the meter. Read the Installation & Basic Setup Instructions
manual in its entirety. All notices and warnings contained in that document apply
to the switchboard meter as well.
CAUTION
For 120V, 110V, 69.3V or 63.5V transformer-coupled systems only
The switchboard meter is pre-wired for use in systems that use PTs with 120V, 110V, 69.3V or 63.5V
secondaries. Using the switchboard meter in other applications or higher voltage systems may
permanently damage the meter.
(This Caution does not apply to the P24 power supply option).
Installation and maintenance of the switchboard meter should only be performed
by qualified and competent personnel who have appropriate training and
experience with high voltage and current devices.
In this document
◆ Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Suggested Mounting Hole Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
◆ Wiring
the Switchboard Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Voltage and Current Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Powering the Switchboard Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connecting the Unit’s Chassis Ground Connection . . . . . . . . . . . . . . . . . . . . . 6
Power System Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
© 2002 Siemens Energy & Automation. All rights reserved. The information in this document is believed to be accurate at the time of publication, however, Siemens Energy & Automation assumes no responsibility for errors which may
appear here and reserves the right to make changes without notice. ION is a registered trademark of Power Measurement Ltd. All other trademarks are property of their respective owners.
Installation Overview
9300 Series Switchboard Meter Installation Instructions
Installation Overview
CAUTION
Installation and maintenance of the switchboard meter should only be performed by qualified personnel
who have appropriate training and experience with high voltage and high current devices.
If the switchboard case is included with your meter, draw the meter chassis out of
the case to facilitate its installation into the mounting hole. Installing and setting
up the switchboard meter is summarized in the following steps.
1.
Review the unit’s dimensions and prepare a mounting hole for the
switchboard case. If you are retrofitting your switchboard meter into an
existing case, you may have to drill or punch a 29mm (1.13”) round hole in the
back of the case to accommodate communications, I/O, and/or auxiliary
power wiring.
NOTE
For retrofitting S1 style switchboard cases, a pre-drilled backplate is included. To use it, remove the backplate from the old switchboard case and replace it with the supplied backplate.
Place the supplied 29mm (1.13”) nylon bushing into the drilled hole if desired.
Refer to “Unit Dimensions” on page 4.
Page 2
2.
Place the switchboard case into the prepared mounting hole. Attach the
mounting screws.
3.
Wire the phase voltages and currents to the terminal posts on the rear of the
case; refer to “Power System Wiring Diagrams” on page 8. Connect the chassis
ground to switchgear earth ground; refer to “Connecting the Unit’s Chassis
Ground Connection” on page 7.
4.
Read the warning label on the green captured-wire plug.
5.
Connect any communications, I/O, and/or auxiliary power wiring to the
meter.
◆
For the P24 power supply option, ensure that the auxiliary power cable is
powered off.
◆
Pass all wiring through the switchboard case using the round hole in back.
◆
Connect the communications and I/O wiring to the meter; for the P24
power supply option, also connect the auxiliary power cable to the meter’s
power supply terminals.
◆
Slide the meter chassis into position while feeding the excess wiring
through the hole in the rear of the switchboard case, making sure none of
the wires are pinched.
◆
Secure the meter by locking the two chassis levers into position.
◆
Wire any external communications and I/O; for the P24 power supply
option, connect the other end of the auxiliary power cable to an external
dedicated 20 to 60VDC source that is powered down.
70050-0162-03 October 30, 2001
9300 Series Switchboard Meter Installation Instructions
Installation Overview
6.
Connect the ribbon cable to the back of the display on the case cover.
7.
Energize the meter as follows:
8.
9.
◆
For the P24 power supply option, power up the auxiliary power
(20 to 60VDC) source.
◆
For the standard option, the meter is powered up when the voltage inputs
are applied in the next step.
Apply the current and voltage inputs:
◆
For S1 style switchboard meters, insert the connection plug into the slot at
the bottom of the meter.
◆
For FT21 style switchboard meters, push the shorting switches up.
Place the case cover into position and tighten the thumbscrew(s).
10. Perform basic setup and verify the meter’s operation: refer to the meter’s
Installation and Basic Setup Instructions manual for details.
70050-0162-03 October 30, 2001
Page 3
Unit Dimensions
9300 Series Switchboard Meter Installation Instructions
Unit Dimensions
S1 Case
142mm
(5.59") 42mm
(1.65")
34mm
(1.34")
29mm
(1.13")
206mm
(8.11")
239mm
(9.39")
99mm
(3.89")
75mm
(2.96")
49mm
(1.92")
56mm
(2.19")
176mm
(6.91")
157mm
(6.19")
172mm
(6.77")
FT21 Case
145mm
(5.69")
105mm
(4.14")
47mm
(1.84")
226mm
(8.89")
265mm
(10.42")
113mm
(4.45")
43mm
(1.69")
163mm
(6.43")
51mm
(2.00")
152mm
(6.00")
169mm
(6.65")
c
Page 4
70050-0162-03 October 30, 2001
9300 Series Switchboard Meter Installation Instructions
Suggested Mounting Hole Dimensions
Suggested Mounting Hole Dimensions
S1 Case Hole
FT21 Case Hole
156mm (6.14")
149mm (5.87")
141mm (5.55")
146mm (5.75")
246mm (9.69")
230mm (9.06")
210mm (8.27")
111mm (4.37")
70050-0162-03 October 30, 2001
Page 5
Wiring the Switchboard Meter
9300 Series Switchboard Meter Installation Instructions
Wiring the Switchboard Meter
DANGER
During normal operation of this device, hazardous voltages and currents are present on the device and
throughout the connected potential transformers (PTs), current transformers (CTs), control power and I/O
circuits. Use authorized utility procedures to install and service metering equipment. Equipment damage,
personal injury and death can result if circuit closing devices are not used, or if safety precautions are not
followed.
Voltage and Current Terminals
CAUTION
For 120V, 110V, 69.3V or 63.5V transformer-coupled systems only
The switchboard meter is pre-wired for use in systems that use PTs with 120V, 110V, 69.3V or 63.5V
secondaries. Using the switchboard meter in other applications or in higher voltage systems may
permanently damage the meter.
All voltage and current connections to the switchboard meter are made to
terminals located on the rear of the unit. External 2A slow-blow fuses are
recommended to be used between the meter’s V1, V2, V3 terminals and the PT
secondaries. When the meter is removed from its draw-out case, the current inputs
are automatically short-circuited — thus the use of external shorting blocks is not
required. The phase voltage and current terminals are of a screw-in-type for which
ring or spade terminals may be used to simplify connection. The locations of the
voltage and current terminal posts are shown in the wiring diagrams starting on
page 8. For further information and wire dimensions, refer to the meter’s
Installation and Basic Setup Instructions manual.
Powering the Switchboard Meter
The standard switchboard meter is powered from the voltage sensing terminals V1
and V3 on the rear of the switchboard case (i.e. the switchboard meter’s power
supply L/+ and N/- connectors are hard-wired to the V1 and V3 chassis
terminals).
Optionally, the switchboard meter can be powered from a separate AC or DC
voltage source — this requires modifications to be made to the internal wiring
harness; contact Technical Services for more information.
The optional P24 power supply must be connected to an external dedicated
20 to 60VDC source.
Page 6
70050-0162-03 October 30, 2001
9300 Series Switchboard Meter Installation Instructions
Connecting the Unit’s Chassis Ground Connection
Connecting the Unit’s Chassis Ground Connection
CAUTION
The switchboard meter must be installed with an adequate chassis ground connection. Use authorized
utility procedures to install the ground connection before wiring. Hazardous voltages are present on the
device. Ground the device BEFORE power is applied.
Failure to properly connect the chassis ground will void the unit’s warranty.
The ground terminal on the rear of the switchboard case provides the chassis
ground connection. The chassis ground source must be installed before the
switchboard meter can be installed — a good low impedance chassis ground
connection is essential for the meter’s surge and transient protection circuitry to
function effectively.
The ground should be wired to the earth ground using a dedicated AWG 14
(2.5mm2) or larger wire to a point where there will be no voltage error due to
distribution voltage drops. Do not rely on metal door hinges as a ground path.
Ensure that the ground terminal screw is tightened down securely onto the ground
wire.
The arrows in the diagram below indicate where the grounding posts are located
(on the back of the switchboard meter):
70050-0162-03 October 30, 2001
Page 7
Power System Wiring Diagrams
9300 Series Switchboard Meter Installation Instructions
Power System Wiring Diagrams
FT21 Case
LINE
A B C
N
Fuses
PTs
Fuses
2A
V1
1
FT21 Case
V3
2
V2
VOLTS MODE should be set to
4W-WYE.
3
I11
CTs
I12
4
PTs with 120V, 110V, 69.3V or
63.5V secondaries must be
used for 4-wire Wye systems.
Both the PT primary and secondary circuits should be protected by breakers or fuses at
their source. Wiring must be
exactly as shown for correct
operation.
4-Wire Wye, 3-Element, 3 PT Connection Diagram
5
NOTE
7
I31
I22
6
I21
Export
9
I32
8
I31
10
Vref
Switchgear
Chassis Ground
Import
LOAD
S1 Case
LINE
A B C
N
Fuses
PTs
Fuses
2A
3
I11
CTs
2
V2
5
I21
4
I12
7
I31
I31
6
I22
Vref
Import
LOAD
Page 8
9
V3
8
I32
Export
10
V1
1
S1 Case
Switchgear
Chassis Ground
70050-0162-03 October 30, 2001
9300 Series Switchboard Meter Installation Instructions
FT21 Case
LINE
A B C
N
Fuses
PTs
Fuses
2A
V1
1
FT21 Case
V3
I11
CTs
I12
4
VOLTS MODE should be set to
3W-WYE.
2
V2
3
This
2½-element
scheme
requires only 2 PTs with 120V,
110V, 69.3V or 63.5V secondaries. In this configuration, the
phase B voltage displayed by
the meter is derived from the
phase A and C voltages. If the
voltages are unbalanced, the
power readings may not meet
the meter’s accuracy specifications.
4-Wire Wye, 2½-Element, 2 PT Connection Diagram
5
NOTE
Power System Wiring Diagrams
7
I31
I22
6
I21
Switchgear
Chassis Ground
Vref
10
Export
9
I32
8
I31
Import
LOAD
S1 Case
LINE
A B C
N
Fuses
PTs
Fuses
2A
3
I11
CTs
2
V2
5
I21
4
I12
7
I31
I31
6
I22
Vref
Import
9
V3
8
I32
Export
10
V1
1
S1 Case
Switchgear
Chassis Ground
LOAD
70050-0162-03 October 30, 2001
Page 9
Power System Wiring Diagrams
FT21 Case
Fuses
Fuses
2A
FT21 Case
V1
1
LINE
A B C
2
V2
VOLTS MODE should be set to
DELTA.
V3
PTs
3
I11
CTs
I12
4
The switchboard meter requires
PTs with 120V, 110V, 69.3V or
63.5V secondaries. In this configuration, the meter senses the
line-to-line voltages between
each of the phases.
3-Wire Delta, 2½-Element, 2 PT & 3 CT Connection Diagram
5
NOTE
9300 Series Switchboard Meter Installation Instructions
7
I31
I22
6
I21
Import
Vref
10
Switchgear
Chassis Ground
9
I32
Export
8
I31
LOAD
S1 Case
Fuses
S1 Case
V1
CTs
V2
I11
2
PTs
5
I21
4
I12
LOAD
Page 10
Switchgear
Chassis Ground
Vref
9
V3
8
I32
Export
Import
7
I31
6
I22
10
2A
1
Fuses
3
LINE
A B C
70050-0162-03 October 30, 2001
9300 Series Switchboard Meter Installation Instructions
FT21 Case
LINE
A B C
Fuses
Fuses
2A
FT21 Case
V1
1
2
V2
VOLTS MODE should be set to
DELTA.
V3
PTs
CTs
I11
4
The switchboard meter requires
PTs with 120V, 110V, 69.3V or
63.5V secondaries for ungrounded 3-wire systems. In this
configuration, the meter senses
the line-to-line voltages between
each of the phases.
3-Wire Delta, 2-Element, 2 PT & 2 CT Connection Diagram
3
NOTE
Power System Wiring Diagrams
5
I12
6
I21
7
I31
I22
8
I31
Import
Vref
10
Switchgear
Chassis Ground
9
I32
Export
LOAD
Fuses
Fuses
S1 Case
2A
V1
I11
3
PTs
CTs
2
V2
5
I21
4
I12
LOAD
70050-0162-03 October 30, 2001
Switchgear
Chassis Ground
Vref
9
V3
8
I32
Export
Import
7
I31
I31
6
I22
10
LINE
A B C
1
S1 Case
Page 11
Wiring for the P24 Power Supply Option
9300 Series Switchboard Meter Installation Instructions
Wiring for the P24 Power Supply Option
1.
Connect the auxiliary power cable to the meter’s power supply terminals.
2.
Connect the other end of the cable to an external dedicated 20 to 60VDC source
that is powered down.
Energizing the meter
Energize the meter by powering up the dedicated 20 to 60VDC source.
32
31
22
21
COM1
DIGITAL PORTS
VREF
V1
V2
12
V3
11
COM2
N
L
G
2A slow blow fuse
External dedicated
20 to 60VDC source
Page 12
70050-0162-03 October 30, 2001