Controller structure of electronic low-voltage circuit breaker

Abstract

The invention discloses a controller structure of an electronic low-voltage circuit breaker. The controller structure comprises a support base, a circuit board, transformers and an actuator. The controller structure is characterized in that a first support at the left end, a second support at the right end and two third supports in the middle form a cuboid shell frame structure enveloping the transformers; the cuboid shell frame structure is fixedly arranged on the lower part of the support base; a support top cover is fixedly connected on the upper part of the support base; the circuit boardand the actuator are arranged inside the support base; and the first support, the second support, the two third supports, the support base and the support top cover form the cuboid packaging structure. The controller structure has the following beneficial effects: the whole controller is completely enveloped in the cuboid structure of the packaged plastic part and is absolutely isolated from the major loop of the circuit breaker, thus ensuring the insulating property of the controller; the leads are avoided from being damaged in the assembly process; the assembly is simple; and assembly of the tripolar or quadrupolar transformers can be easily and flexibly realized.

Description

technical field [0001] The invention relates to an electronic low-voltage circuit breaker, in particular to a controller structure of the electronic low-voltage circuit breaker. Background technique [0002] Commonly used low-voltage circuit breakers include power distribution type, motor protection type, residual current protection type and electronic type. Electronic low-voltage circuit breakers have functions such as overload long-time delay, short-circuit short-time delay, short-circuit instantaneous and undervoltage protection, which provide more reliable and comprehensive protection for power distribution lines and electrical equipment. The various functions of the electronic low-voltage circuit breaker are realized by its controller. The controller includes: transformers, circuit boards, actuators, and brackets for fixing and connecting the three. Each pole of the circuit breaker has a transformer for real-time detection of current flow. When the current condition of...

AI Technical Summary

Problems solved by technology

[0003] At present, the transformer in the controller of the electronic circuit breaker is generally directly positioned in the limit groove matched with the base, so there are many limit devices on the base that cooperate with the transformer, which complicates the base, and the transformer Without special protection, the insulation strength of the main circuit with the circuit breaker is not enough, and it is easy to burn the transformer and cause short circuit between phases under the condition of high current of the circuit breaker

The existing wiring method is that any transformer has lead wires connected to the circuit board, and a certain number of connecting wires are inevitably exposed outside the circuit board bracket. The main circuit that hits the circuit breaker

The existing circuit board is generally installed directly in the bracket of the controller, without reliable positioning, and the insulation strength with the main circuit is not enough, there are certain potential safety hazards

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