Bulletin No. 3020IM9503R6/98 Power Meter
December 1998 Appendix D—Additional Wiring Diagrams
1998 Square D All Rights Reserved 75
➀ System type as shown on power meter setup screen.
➁ For 3Ø, 3W delta corner-grounded applications, install two L-L rated PTs as shown in figures 5-4 and 5-5.
Table D-1
Power Meter System Wiring Connections
System Wiring
Power Meter Wiring for
Notes
System I.D.
➀
Power Meter
3Ø, 4W wye 40 3Ø, 4W wye
grounded figure 5-6
neutral or 5-7
3Ø, 3W wye 30 or 31 3Ø, 3W delta
figure 5-3,
5-4, or 5-5
3Ø, 3W wye, 40 3Ø, 4W wye 1.
Connect GND to neutral voltage terminal.
grounded figure 5-6 2.
Line to neutral voltage may be unbalanced
neutral or 5-7
due to potential difference between GND
at transformer & GND at meter.
3Ø, 4W wye 40 3Ø, 4W wye
figure 5-6
or 5-7
2Ø, 3W wye, 40 1Ø, 3W 1. Jumper input of phase not being metered
grounded figure D-1 to neutral voltage input.
neutral
3Ø, 3W delta ➁
30 or 31 3Ø, 3W delta 1. For ungrounded delta systems only.
figure 5-3
3Ø, 4W delta, 40 3Ø, 4W 1.
Per phase power factor will be determined
grounded figure D-2
with respect to neutral.
mid-tap 2.
Always use 480/277 voltage range on the
power meter.
3Ø, 4W 40 3Ø, 4W 1.
Per phase power factor will be determined
open delta, figure D-2
with respect to neutral.
grounded 2.
Always use 480/277 voltage range on the
mid-tap power meter.
3Ø, 3W open 30 or 31 3Ø, 3W delta 1. Wire grounded corner into B phase
delta, corner figure 5-4 voltage input.
grounded or 5-5
1Ø, 3W 40 1Ø, 3W 1. B phase readings will be zero.
grounded figure D-1 2.
Always use 208/120 voltage range on the
mid-tap power meter.
1Ø, 2W 40 1Ø, 3W 1. Use only L
1
-N PT and L
1
CT.
grounded figure D-1 2. B & C phase readings will be zero.
end of phase 3.
Always use 208/120 voltage range on the
mid-tap power meter.
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