Reclosing mechanism and method for residual-current circuit breaker provided with separation and reunion mechanism

Abstract

The invention discloses a reclosing mechanism and method for a residual-current circuit breaker provided with a separation and reunion mechanism. A stirring rod between the left side wall of an outer frame and a handle driving part is sleeved with a return spring and a fixing part which is used for preventing the return spring from moving towards the right end of the stirring rod. The left portion of the axial separation and reunion mechanism is sleeved with a third rotary plate in a non-contact mode, the third rotary plate is located on the right side of the fixed end of a second connecting rod, a movable board which is movably connected with the right side wall of the outer frame is arranged above the right portion of the axial separation and reunion mechanism, and the front side and the rear side of the movable board are connected with the front side and the rear side of the third rotary plate through connecting rods respectively. An ejector rod penetrates through the right portion of the axial separation and reunion mechanism and an output shaft of a motor in the radial direction, and one end of the ejector rod protrudes out of the right portion of the axial separation and reunion mechanism. The movable board is pressed downwards, the third rotary plate moves in the left direction, the bottom of the movable board makes contact with the outer surface of a second rotary plate, and the ejector rod does not make contact with the bottom of the movable board. Electric operation and manual operation do not affect each other, and reliable running of the circuit breaker is guaranteed.

Description

technical field [0001] The invention relates to a molded case circuit breaker with residual current protection in the low-voltage electrical technical field, in particular to a reclosing mechanism of a leakage molded case circuit breaker with an automatic reclosing function. Background technique [0002] The leakage molded case circuit breaker with automatic reclosing function can ensure the continuous, safe and reliable operation of the power system. At present, the existing automatic reclosing mechanism of the molded case circuit breaker includes a handle, at least two large and small gears, a number of stamping parts and a number of standard parts. The motor is connected to the handle through the connecting rod on the eccentric wheel. The rod reciprocates to achieve the purpose of closing and opening the leakage circuit breaker. This reclosing mechanism has the following problems: 1. The gear is difficult to process, and the efficiency is relatively low, which increases ...

AI Technical Summary

Problems solved by technology

This reclosing mechanism has the following problems: 1. The gear is difficult to process, and the efficiency is relatively low, which increases the production cost

2. When installing, the component parts are not a whole structure, and cannot be installed as a whole set of components, and each circuit breaker mechanism needs to be adjusted separately

[0003] The Chinese patent application number is 2013102132814, and the name is "a reclosing mechanism for leakage circuit breakers". Two handle drivers are used. These two handle drivers respectively drive the circuit breaker to open and close, and are rigidly connected to the motor. Its defect is: in the process of tripping or opening and closing of the leakage circuit breaker, if the motor is powered off due to a fault, the handle of the leakage circuit breaker will not be manually operated, and the use of the circuit breaker will be affected

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