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EPM 5300 SERIES ADVANCED POWER METERS – INSTRUCTION MANUAL 13–101
EPM 5300 Series Meters
Chapter 13: Phase Reversal
and Phase
Imbalance Set
Limits/Relays
GE Consumer & Industrial
Multilin
Phase Rever sal and Phase Imbalance Set Limits/Relays
13.1 Phase Reversal and Phase Imbalance
The set limit alerts the user of an unbalanced or a reversed phase in a Three-phase
System. The EPM 5300P has two options for this purpose. The standard set-up is clockwise
ABC rotation. Counterclockwise CBA rotation can be selected in GROUP 03.1, Switch C UP.
PHASE REVERSAL: Activates when a reversed phase enters the EPM 5300P’s metering
system.
PERCENT PHASE IMBALANCE: Activates when the user's preset value percent phase
imbalance is exceeded. For example: an unbalanced Three-phase System.
Note: The EPM 5200P does not have this capability.
FIGURE 13–1: Example of Set Limits
Limits Triggered
Limits Not Triggered
10%
10:00 AM 11:00 AM
PHASE IMBALANCE
(
%
)
THREE-PHASE SYSTEM IMBALANCE