GE EPM 5200 Chapter Groups 4, 5 and 6-SET Limits and Relays, Example of LM1/LM2 SET Limits

CHAPTER 12: GROUPS 4, 5, AND 6 – SET LIMITS AND RELAYS

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

120

100

80 80

CURRENT 60 (AMPS) 50 40

20

0

A

120 LM1 is triggered

LM1 SET TO TRIGGER ABOVE 100 AMPS.

	LM2 SET TO
40 LM2 is triggered	TRIGGER BELOW
	50 AMPS.

BC

PHASES

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

GE Industrial Systems 5300P Advanced Power Meter 71