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A If the frame circuit breaker has insufficient energy storage, check whether the energy storage mechanism is faulty. If it is faulty, repair or replace the energy storage mechanism. At the same time, check whether the power supply is normal. If the power supply is abnormal, you need to troubleshoot and solve the power supply problem.
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A If the main contact of the frame circuit breaker has poor contact, it may be that the contact surface is oxidized or worn. The contact should be removed for cleaning and polishing. If the contact is severely worn, a new contact needs to be replaced. At the same time, check whether the contact pressure is sufficient. If the pressure is insufficient, adjust the contact pressure.
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A If the frame circuit breaker fails to open, it may be that the opening coil is damaged and the opening coil needs to be replaced. At the same time, check whether the control circuit is faulty. If the circuit fails, it needs to be carefully checked and repaired. In addition, check whether the mechanical interlock fails. If it fails, readjust the interlock device.
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A Overheating of the frame circuit breaker contacts may be due to excessive contact resistance. The contact condition of the contacts should be checked and necessary cleaning and polishing should be performed. At the same time, check whether the contact pressure is sufficient. If the pressure is insufficient, adjust the contact pressure spring. In addition, check whether the heat dissipation conditions are good. Improving the heat dissipation conditions can reduce the contact temperature.
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A Frequent tripping of the frame circuit breaker may be due to load overload, and the load condition should be checked. At the same time, poor power grid quality, such as excessive harmonics, may also cause the release to fail and cause frequent tripping. In addition, it is necessary to check whether the release is faulty and whether the protection device is triggered by mistake.
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A If the frame circuit breaker cannot be closed normally, it may be due to a fault in the operating mechanism, which needs to be checked and repaired. At the same time, check whether the switch is energy-storing. If the switch is not energy-storing or the energy storage is insufficient, it will also cause the switch to fail to close. In addition, it is necessary to check whether the drawer switch body is shaken to the correct position, whether the 24V machine line terminal is in normal contact with the switch body, and whether the coil is energized at the same time.
