8-16
MIB High Impedance Bus Differntial Relay
GEK-106426B
8.15 ACCEPTANCE TEST FOR HIGH IMPEDANCE MODULE
8 RELAY COMMISSIONING
8
Resistors Measure
Check that the resistor value between terminals is 2K:
NOTE: Accuracy of 12%.
C12 – D8
C11 – D7
C10 – D6
Thyrites current measure:
8.15.5 LATCHING RELAY
Contact test:
•
Check with the external wiring diagram that all the auxiliary contacts of the latching relay are open and,
therefore, there is no continuity between them.
•
Apply voltage to terA1 y –A4 and verify that latching relay contacts operation time is below 25 ms.
•
Verify that all auxiliary contacts have changed their position to closed and that there is continuity between each
pair of them.
•
Apply voltage to terB9 and –B12 and verify that latching relay contacts opening time is below 20 ms.
•
Check that all auxiliary contacts have changed to their default position (open) and, therefore, there is no
continuity between each pair of them
Lamp:
•
Apply the latching relay rated voltage to terminals CN-A6 and CN-A9 and check that the button lightens up.
•
Switch the voltage off and check the lamp turns off.
•
Press the button and check for continuity between CN-A7 and CN-A8
MOV TERMINALS
APPLIED VOLTAGE
290 VCA
C12-D4
2- 10 mA
C11-D3
2- 10 mA
C10-D2
2- 10 mA
