RMU TEST REPORT
VISUAL AND MECHANICAL INSPECTION
Inspect for physical damage & verify nameplate data to plans & OK NOT OK
specifications.
Follow manufacturer directions when performing mechanical OK NOT OK
operations testing.
Ensure proper working of grounding switch. OK NOT OK
Check interlocks for proper operation. OK NOT OK
Verify for positive gas pressure in SF-6 switches and ensure no OK NOT OK
leaks.
Verify all indicators for the earth switch and isolator. OK NOT OK
Ensure hardware is correctly fitted and torqued. OK NOT OK
Grounding installed according to design standards. OK NOT OK
ELECTRICAL TESTS
Test the insulating resistance on each pole for 1 minute. OK NOT OK
Verify the continuity of the ground connection across the breaker OK NOT OK
& the ground grid.
Perform trip tests on the circuit breakers. OK NOT OK
Verify the settings & operation of protective relays. OK NOT OK
Check an actual circuit breaker trip test done with current OK NOT OK
injection.
NAMEPLATE DATA
Switch No.
Manufacturer
Model No.
Serial No.
Rated Voltage
INSULATION RESISTANCE TEST
APPLIED VOLTAGE - 5KV DC
PHASE MEASURED IR VALUE IN ACCEPTANCE
SEQUENCE (GΩ)
R-E OK / NOT OK
Y-E OK / NOT OK
B-E OK / NOT OK
RY OK / NOT OK
YB OK / NOT OK
BR OK / NOT OK
Testing Engineer
Signature
Date
PROTECTION RELAY
Switch No. RMU
Manufacturer
Model No.
Protection function Ip>, Ip>>, Ie>, Ie>>
SETTING VALUES FOR PROTECTION:
Nominal Current: 38 A
Ip>: 1.1= 41.8 A, TMS:1.0 Normal Inverse curve
Ip>>: 2= 114 A, TMS: 0.05 Definite time
Ip>: 0.6= 22.8 A, TMS:1.0 Normal Inverse curve
Ip>>: 2= 60 A, TMS: 0.05 Definite time
METERING FOR CURRENT ELEMENT
INJECTED MEASURED MEASURED MEASURED ACCEPTANCE
CURRENT R PH Y PH B PH +-5%
(AMPS) (AMPS) (AMPS) (AMPS)
TESTING FOR CURRENT PROTECTION ELEMENT
Protection I set Curve Time I Pick up Trip time Trip time Acceptance
Function (A) type Multiplier (A) expected expected
setting Seconds Seconds
Over 41.8 Normal 1 OK
current Ip> Inverse
Over 114 Definite 0.05 OK
current time
Ip>>
Earth fault 22.8 Normal 1 OK
Ie> Inverse
Earth fault 60 Definite 0.05 OK
Ip>> time
Testing Engineer
Signature
Date
