PT SCHNEIDER INDONESIA
WORKING INSTRUCTION
No Doc
WI-STE-001
Product
Area
BLOKSET
Site Execution Service
Notification of Modification :
LV SWITCHGEAR COMMISIONING PROCEDURE
3-
ELECTRICAL OPERATING TEST
3-1
Electrical Operation Test
All main/critical equipment shall be verified in demonstration of correct
function based on schematic diagram and logic diagram.
4-
BUSBAR INSULATION RESISTANCE TEST
4-1
Insulation test is made to measure insulation between phases and
each phase to ground.
For main Circuit of LV switchgear, Insulation tension shall not exceed 1 kV dc..
(PEARL Standard / NETA MTS-1997 Table 10.1)
Max.Voltage Rating
Of Equipment
250 Volts
600 Volts
5 KV
8 KV
15 KV
25 KV
35 KV
46 KV
69 KV
Megger Size
500 Volts
1,000 Volts
2,500 Volts
2,500 Volts
2,500 Volts
5,000 Volts
15,000 Volts
15,000 Volts
15,000 Volts
Min.IR Value
25 M
100 M
1,000 M
2,000 M
5,000 M
20,000 M
100,000 M
100,000 M
100,000 M
The test is to measure the insulation level between phases and phase to
ground/body.
Warning before testing:
This testing must be carried out by competent personnel.
Ensure there is no voltage on LV circuits.
Ensure cleanness of panel prior to testing.
Ensure body of panel is grounded.
Isolate and secure testing area.
The secondary winding of CT shall be short and connected to ground.
Disconnect VT from the main circuit.
During testing, increase the tension gradually in order to anticipate failure
before destroying any equipment.
PT SCHNEIDER INDONESIA
WORKING INSTRUCTION
No Doc
WI-STE-001
Product
Area
BLOKSET
Site Execution Service
Notification of Modification :
LV SWITCHGEAR COMMISIONING PROCEDURE
5-
CIRCUIT BREAKER TESTS
5-1
6-
Circuit breaker test
All main/critical equipment shall be verified in demonstration of correct
function.
RELAY PROTECTION (MICROLOGIC) SETTING AND TEST
6-1
Protection Relay (MICROLOGIC) Test
Ensure that the protection relay is working based on system
requirement and logic diagram.
Apply simulated current or voltage or frequencyor phase angle of fault
condition to the relay using secondary injection