0HK.412.530SM
LW36A-126/145
High Voltage SF6 AC Circuit Breaker
21/30
5
．
Try operate had best use motor distance control, before operate, all operators shall outer of
30m or behind cover.
6
．
Strictly prohibit the circuit breaker single operate or two phase operate through fair and foul.
To finish 5 times switch on operation, 5 times switch off operation and 3 times cycle operation.
5
．
2 The inspecting and test after installed
5.2.1 measuring the mechanical operation characteristic
In switching on and switching off, register the energy store time, switch off time and switch on time of
spring mechanism.
5
．
2
．
2 Measuring the resistance of main loop
In switch on state, measuring the resistance of three phases main loop and register it.
5
．
2
．
3 Measuring insulation resistance
In the state of switch on and switch off, measuring the insulation resistance of three phases fracture and
to earth by megger, and register it.
5
．
2
．
4 Power frequency voltage withstand test
If the condition allowed, test the power frequency voltage withstand and register it.
5
．
2
．
5 Check the performance of density controller
Closing the valve of regulating lever box, connecting the deflate joint to the gas charge joint of in base,
screw bolt slowly, to leak the gas inside the pipeline slowly. When the gas SF6 pressure fall down to
alarm pressure, it shall be alarm; When the pressure fall down to closedown pressure, check the circuit
breaker whether is in closedown state. Then remove the deflate joint, open the valve of regulating lever
box( one phase) slowly, monitoring the finger of density controller whether restore.
After checked, opening the three phases regulating lever box, when the gas SF6 pressure is lower than
0.60Mpa, charging the circuit breaker’s air chamber to rated pressure by charging device. After
charged, screw out the charging device and save it, and fix the protection bolt of charging joint in base.
5
．
2
．
6 Leak hunting of circuit breaker
Checking airtightness of all sealing surface of circuit breaker, especially check the gas charge pipeline,
whether the joint leak gas. If the joint is leaking gas, you can remove the joint, check whether the
sealing surface have eyewinker or whether the O type gasket ring was broken, to leak huntung again
after changed. If there are still leak hunting, please notify manufacturer to solve it in time.
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