CHAPTER 12: GROUPS 4, 5, AND 6 – SET LIMITS AND RELAYS
GE Industrial Systems 5300P Advanced Power Meter 71
CHAPTER 12
GROUPS 4, 5 AND 6—SET LIMITS AND RELAYS
The EPM 5300P -NL offers a comprehensive limit and set point functionality. The user can program
above or below limits for every reading, including %THD. When a voltage or current measurement
exceeds a particular value, the set limit is triggered and alerts the user. Each limit can trigger two internal
Form C dry contact relays for alarm or secondary protection.
The EPM 5300P offers two set limit points available for each measured function: LM1 and LM2. Each limit
can be set at any desired level. Note: The EPM 5200P does not have limit setting capability.
EXAMPLE OF LM1/LM2 SET LIMITS
LM1 AND LM2 SET LIMITS
PHASES
CURRENT
0
20
40
60
80
100
120
ABC
120
40
LM1 is triggered
LM2 is triggered
50
(AMPS)
80
LM1 SET TO
TRIGGER ABOVE
100 AMPS.
LM2 SET TO
TRIGGER BELOW
50 AMPS.
12.1: Trip Relay
The EPM 5300P -NL has two relays. These relays are linked through the program to Set Limits LM1 and
LM2. The user can program above or below set limits for every reading. When a measurement exceeds
a particular value, the set limit triggers and alerts the user. Each relay is programmed to a separate delay
time (see Chp. 10).
12.2: Time Delays & Relay Mode
Time Delay indicates whether a delay exists in the relay changing position. Relay Mode indicates
whether the relay will act as a protective switch or not.
NOTE: The Time Delay and Relay Mode are both located in GROUP 0, FUNCTIONS 4 & 5.
THE FOLLOWING GROUPS ALLOW THE USER TO PROGRAM LIMITS AND RELAYS:
GROUP 4: VOLTS/AMPS SET LIMITS / RELAYS
GROUP 4 contains LM1 and LM2 set limit values for voltage and amperage scales. This allows the user
to program limits for the four following functions:
1) Volts phase-to-neutral
2) Volts phase-to-phase
3) Amps A, B, C
4) Amps neutral
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