Low-voltage integrated appliance

Abstract

The invention discloses a low-pressure integrated electric appliance, which consists of rack and rotary shaft on the rack, wherein the rack has rotary contact mechanism and rotary electromagnetic mechanism along rotary shaft direction; the rotary contact mechanism consists of mobile contact component and statical contact; the mobile contact component connects the rotary shaft; the statical contact is fixed on the rack through statical contact arm, which is on the same cross cut plane with the mobile contact component; the mobile iron core, statical iron core and electromagnetic coil jacketed on the statical iron core are set on the rotary electromagnetic mechanism to keep sucking condition when the mobile and statical contacts touch; the mobile iron core is fixed on the rotary shaft to rotate at the same shaft with the mobile contact; the statical iron core is fixed on the rack, which is on the same cross cut plane corresponding to the statical iron core. The invention controls the electric appliance reliably and rapidly with little bulk and low operating consumption, which realizes the cutting-in and breading effectively.

Description

technical field [0001] The invention relates to a low-voltage integrated electrical appliance. Background technique [0002] For decades, the performance indicators and functions of low-voltage electrical products have been greatly improved, especially the birth of intelligent circuit breakers, marking the beginning of the era of electrical intelligence. However, due to the complexity of electrical work and the Requirements, research on electrical technology and products has not achieved a leap, obviously, the development of electrical products has restricted the development of the entire system. [0003] Low-voltage control and protection switchgear (CoMtrol aMd Protective SwitchiMg Devices—CPS) is a new type of electrical appliance introduced internationally in the 1980s. It integrates the functions of circuit breakers, contactors, motor protectors and isolating switches. It is an integrated electrical appliance. Therefore, this new type of electrical appliance has attrac...

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Problems solved by technology

[0004] At present, low-voltage integrated electrical appliances have launched products, such as KB0-T (WLC) series intelligent products, Schneider U series, and there are also papers introducing relevant content, such as "SDMK1 intelligent control" published by Wang Danli in the fifth issue of "Low Voltage Electrical Appliances" in 2006 and Protective Switching Apparatus", Hu Jingtai and others published "Development and Application of Communicable Intelligent Control and Protective Switching Appliances" in "Low-Voltage Electrical Appliances" No. 8, 2004, Cai Zhiyuan et al. published in "Low-Voltage Electrical Appliances" No. 5, 2003 "Intelligent integrated low-voltage electrical appliances", low-voltage integrated electrical appliances can adopt two schemes, one is based on the complex mechanical operating mechanism of the circuit breaker, and the other is based on the electromagnetic mechanism of the AC contactor. However, these two It is difficult to solve the contradiction between high breaking capacity, high electrical life and high operating frequency. At present, low-voltage integrated electrical appliances mainly adopt the structural form of the traditional electromagnetic drive mechanism of the AC contactor as the control electrical appliance. This driving mechanism cannot meet high-speed breaking and cannot Improving the breaking capacity of short-circuit faults, due to the diversification of functions of integrated electrical appliances, brings difficulties to the overall improvement of technical and economic indicators, especially how to greatly shorten the troubleshooting time of short-circuit faults, improve the breaking capacity of short-circuit currents, and improve the electrical life of integrated electrical appliances. main research topic

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