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Technical catalog for Susol & Metasol ACB
Technical catalog for Susol & Metasol ACB
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Fig. 7. Separate procedure of Arc chamber
2. Inspection method after trip operation of circuit breaker
1) Figure out what cause the trip operation.
Do not perform the closing operation before figuring out the cause of trip and removing it completely.
The relevant cause will be indicated with LED of OCR in advance and be reported to the circuit breaker by
output signal of SDE contact.
There can be various possible causes for trip operation of circuit breaker. The trip operation can be done due
to the basic function test of facilities or the warning for accident.
2) If short-circuit occurred, check the condition of circuit breaker with the following inspection items suggested
below. (All power source should be disconnected from circuit breakers for the inspection.)
Check Arc chamber. (Refer to C. Inspection method of Arc chamber.)
Check contacts. (Refer to D. Inspection method of Moving contact condition)
Check connection parts are well connected. (ex. Bolt tightened parts, Busbar connected parts, etc,.)
Check Cluster. (Refer to fig. 9.)
3) Re-close after removing the causes for trip operation by checking all inspection items listed above.
3. Inspection method of Arc chamber
1) Remove the mounting screws of the arc chamber.
2) Separate the arc chamber by lifting it up using two screw drivers as shown in fig. 7 below.
3) Check the condition of the disassembled arc chamber.
Check if there are any damage on Grid assy of arc chamber or parts and replace them if necessary.
3. Inspection and Maintenance
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