GE GEK-106273L Instruction Manual page 139

9.19 THERMAL IMAGE UNIT (49)
1. Enable 49 function only.
2. Set the relay as follows:
49 Settings Group
Tap / Pickup
Heating Time Constant T1
Cooling Time Constant T2
3. Apply the following currents and check that the operating time is within the given range:
If your relay is 5 Amps rated current:
Relay Rated Current
(Amps)
5
If your relay is 1 Amps rated current:
Relay Rated Current
(Amps)
1
5 Repeat the test with a Heating Time Constant equal to 60 minutes. Check that the operating values are within the
given range:
If your relay is 5 Amps rated current:
Relay Rated Current
(Amps)
5
If your relay is 1 Amps rated current:
Relay Rated Current
(Amps)
1
Note: You must reset the Thermal Image Unit after each test, to start the following one from the same cold
status.
9.20 TIME SYNCHRONIZATION
Synchronise the relay date and time with the PC, using the ENERVISTA MII SETUP communications program.
Check using the keypad and display that the relay is actually in synchronism with the computer.
9-12
RELAY COMMISSIONING
0.4 x In
3 min.
1 times T1
Applied Current Times the tap set in
(Amps)
4.0
10.0
20.0
Applied Current Times the tap set in
(Amps)
0.8
2.0
4.0
Applied Current Times the tap set in
(Amps)
4.0
10.0
20.0
Applied Current Times the tap set in
(Amps)
0.8
2.0
4.0
MIF Digital Feeder Protection
Operating time
the relay
2 48.5 – 53.6
5
10
Operating time (sec)
the relay
2
5
10
Operating time
the relay
2
5
10
Operating time
the relay
2
5
10
(sec.)
7.06 - 7.80
1.77 - 1.95
48.5 - 53.6
7.06 - 7.80
1.77 - 1.95
(sec.)
960 - 1072
141 - 156
35.4 - 39
(sec.)
960 - 1072
141 - 156
35.4 - 39
GEK-106273L