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CHAPTER 10
P
ROGRAMMING
G
ROUP
4: S
ET
L
IMITS
& R
ELAYS
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.
D
IAGRAM
10.1: E
XAMPLE OF
LM1/LM2 S
ET
L
IMITS
, V
OLTS AND
A
MPS
LM1 AND LM2 SET LIMITS
PHASES
CURRENT
0
20
40
60
80
100
120
A B C
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.
10.1 T
RIP
R
ELAY
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:
E
ACH LIMIT CAN BE PROGRAMMED TO TRIGGER THE TWO INTERNAL
F
ORM
C
DRY CONTACT RELAYS FOR ALARM OR
SECONDARY PROTECTION
.
GROUP 4: SET LIMITS FOR VOLTS/AMPS
T
ABLE
10-0: G
ROUP
4 P
ROGRAMMING
F
ORMAT
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:
I
N
T
ABLE
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