CHAPTER 10

PROGRAMMING GROUP 4: SET LIMITS & RELAYS

GROUP 4 contains LM1 and LM2 set limit values for the voltage and amperage scale allowing the user to program the limits for the following Groups: VOLTS phase-to-neutral, VOLTS phase-to-phase, AMPS A, B, C, and AMPS neutral.

DIAGRAM 10.1: EXAMPLE OF LM1/LM2 SET LIMITS, VOLTS AND AMPS

 

 

 

120

 

120

 

 

 

 

 

 

 

LM1 is triggered

 

 

 

 

 

 

 

 

LM1 SET TO

 

 

 

 

 

 

 

 

 

100

 

 

 

 

TRIGGER ABOVE

 

 

 

80

 

 

 

100 AMPS.

 

 

 

 

 

 

 

 

 

80

 

 

 

 

 

CURRENT

60

 

 

40

 

LM2 SET TO

(AMPS)

50

 

 

 

TRIGGER BELOW

 

 

 

 

 

 

50 AMPS.

 

 

40

 

 

 

 

 

 

 

 

LM2 is triggered

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

0

A

B

C

 

 

 

 

 

LM1 AND LM2 SET LIMITS

 

 

 

 

 

PHASES

 

 

 

 

 

 

 

10.1

TRIP RELAY

 

 

 

 

The EPM3000P 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 Chapter 8).

NOTE: EACH LIMIT CAN BE PROGRAMMED TO TRIGGER THE TWO INTERNAL FORM C DRY CONTACT RELAYS FOR ALARM OR SECONDARY PROTECTION.

GROUP 4: SET LIMITS FOR VOLTS/AMPS

TABLE 10-0: GROUP 4 PROGRAMMING FORMAT

FUNCTION NUMBER

FUNCTION

0.

LM1/LM2 Set Limits for Volts AN,BN,CN

1.

LM1/LM2 Set Limits for Volts AB,CB,CA

2.

LM1/LM2 Set Limits for Amps A,B,C

3.

LM1/LM2 Set Limits for Amps Neutral

E.

Exit Programming GROUP 4

NOTE: IN TABLE 10-0,ALL FUNCTIONS HAVE A TWO PART ENTRY.

Part 1: The first switch sets the limit to trip either above or below the limit value.

The second switch sets whether Relay 1 will trip when the condition occurs.

The third switch sets whether Relay 2 will trip when the condition occurs.

Part 2: The second part is the Limit Value.

34

GE Industrial Systems

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GE EPM 3000P instruction manual Programming Group 4 SET Limits & Relays, 10.1
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EPM 3000P specifications

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