An automatic overflow device for circuit breaker hydraulic mechanism

Abstract

The invention discloses an automatic discharge device of a circuit breaker hydraulic mechanism. The automatic discharge device of the circuit breaker hydraulic mechanism comprises an oil pump, wherein a low pressure oil pipe outlet of the oil pump is connected with a tee, a port of the tee is connected onto an oil return hole of the lower pressure oil pipe, the other port of the tee is connected onto an oil tank, an exhaust bolt is arranged on the low pressure oil pipe outlet of the oil pump, the exhaust bolt is connected with the tee, a port of the tee is connected onto the oil return hole of a lower pressure oil pipe through a new pipeline, and the other port of the tee is connected onto an exhaust screw which is arranged on the upper portion of the oil tank through a pipeline. The automatic discharge device of the circuit breaker hydraulic mechanism has the advantages of convenient installation and reliable exhaust, can eliminate fault that a circuit breaker oil pump can not be pressed (frequently started) because of gas collection, and can be normally pressed and the like.

Description

technical field [0001] The invention relates to a hydraulic automatic overflow device of a hydraulic mechanism of a circuit breaker. Background technique [0002] For a long time, Siemens 3AQ, 3AT circuit breakers often have such problems in actual operation. The oil pump will run continuously during operation, but the pressure inside the switch hydraulic mechanism cannot be established. Under the action of the overtime circuit, the motor circuit of the oil pump is blocked, and the oil pump cannot effectively supplement the pressure after the normal infiltration of the switch hydraulic circuit, causing the pressure to gradually decrease to the reclosing lockout pressure, resulting in the recloser lockout circuit sending a signal to discover the switch defect. [0003] According to Siemens 3AQ, 3AT switch oil pump gas collection causes the oil pump to pressurize and cannot build up the pressure. The main reason is that the gas in the oil pump cannot be discharged in time and ...

AI Technical Summary

Problems solved by technology

[0002] For a long time, Siemens 3AQ, 3AT circuit breakers often have such problems in actual operation. The oil pump will run continuously during operation, but the pressure inside the switch hydraulic mechanism cannot be established. Under the action of the overtime circuit, the motor circuit of the oil pump is blocked, and the oil pump cannot effectively replenish the pressure after the normal infiltration of the switch hydraulic circuit, causing the pressure to gradually decrease to the reclosing lockout pressure, resulting in the recloser lockout circuit sending a signal to discover the switch defect

[0003] According to Siemens 3AQ, 3AT switch oil pump gas collection causes the oil pump to pressurize and cannot build up the pressure. The main reason is that the gas in the oil pump cannot be discharged in time and effectively. When the pump is stopped, the gas cannot effectively return to the fuel tank through the low-pressure oil pipe, which is the main reason why the pressure of the oil pump cannot be built up.

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