Double-motor operation device of circuit breaker

Abstract

The invention provides a double-motor operation device of a circuit breaker. The double-motor operation device comprises motors (2), transmission gears (5), a rack (7), a connecting head (10), two clamping rods (11), a slide rail (8), a slide groove (9) and a slide rod (12), wherein motors are a pair of synchronous reversible motors (2) with same specifications and models; the motors are mounted in parallel at the same horizontal height; each motor is provided with the transmission gear (5) at the same horizontal height; the two transmission gears can be respectively engaged with or disengaged from left and right teeth of the same rack (7) according to needs; an upper fixed plate (1) and a lower fixed plate (6) are respectively arranged above and below the transmission gears (5) and the rack (7); and a pair of manual or electric conversion gears (3), which are engaged with each other, are arranged on the upper fixed plate (1), and a knob (4) is arranged on one conversion gear. The double-motor operation device of the circuit breaker, provided by the invention, is suitable for electric and manual dual-purpose operation mechanisms of large-shell-frame plastic shell circuit breakers with rated currents of not less than 800 A and has the advantages of small volume, light weight, low cost, less power consumption and integral height meeting requirements.

Description

technical field [0001] The invention relates to an electric operating device of a circuit breaker installed in a distribution box of a three-phase four-wire low-voltage circuit, especially an operating device driven by double motors and capable of electric or manual reset after tripping. Background technique [0002] The circuit breaker installed in the three-phase four-wire low-voltage circuit distribution box has developed rapidly in my country in recent years, especially various types of leakage circuit breakers, which have different functions and structures, and there are many types. Due to national standards, there are requirements for the inner height of the distribution box, which limits the height of the circuit breaker. If the circuit breaker is a large frame molded case circuit breaker with a rated current of 800A, it is usually powered by a single motor, and it needs to be equipped with a 20-watt synchronous reversible motor, or a 200-watt series excitation Motor...

AI Technical Summary

Problems solved by technology

If the circuit breaker is a large frame molded case circuit breaker with a rated current of 800A, it is usually powered by a single motor, and it needs to be equipped with a 20-watt synchronous reversible motor, or a 200-watt series excitation Only motors are required. These motors are expensive, consume a lot of power, and are bulky. The overall height of the circuit breaker exceeds the inner height of the distribution box, so it cannot be installed in the box.

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