Switch electric appliance with control and protection function

Abstract

The invention discloses a switch electric appliance with the functions of control and protection. An alternating current and direct current interconvertible modularized structure magnetic system is adopted and a release, an auxiliary contact and a communication module are respectively interconvertible modules. Furthermore, a plurality of auxiliary contact modules and the communication modules can be selectively accessed according to need of users. The switch electric appliance not only has the characteristics and functions of frequent operation and long service life of a contactor, but also has the characteristics and functions of control, protection and rapid breaking of a circuit breaker. The switch electric appliance not only has a function of selecting a matching release according to voltage types and rated current, but also has functions of automatically setting overload, short-circuit protection setting multiples, releasing grades and pole number of load motor. The switch electric appliance has extremely good suitability, great interconvertibility for attachment access, few required product types and few attachment varieties and types, a compact overall structure of a switch, small volume and long service life so as to greatly facilitate the use and management of users and enhance the range of application and reliability of products.

Description

technical field [0001] The invention relates to a switching device with control and protection functions, especially a switching device with the functions of a contactor and a circuit breaker for motor control and protection. Background technique [0002] Circuit breakers are generally used in distribution lines, and contactors are generally used in control systems. The contactor has the ability to operate frequently and has a long life, but it does not have overload and short-circuit protection functions and high breaking performance, while the circuit breaker has good overload and short-circuit protection functions and high breaking performance, but It cannot be operated frequently and has a relatively short lifespan. However, there are quite a few electrical equipment that require not only frequent operation but also overload and short-circuit protection. For switching appliances with control and protection functions, the control function is realized by the electromagne...

AI Technical Summary

Problems solved by technology

This kind of DC magnetic system that must add voltage conversion, adaptation and voltage stabilization circuits not only has a complex structure and high cost, but also reduces the reliability of the product due to the addition of conversion circuits

Furthermore, the short-circuit protection multiple of this prior art cannot be set on site according to user requirements, which may cause the short-circuit multiple to be too large to effectively protect electrical equipment, and cannot fully meet the user's requirements for use, resulting in a decline in the safety protection performance of the product

In addition, there are many types of trippers. Since the tripping level of this electrical appliance and the electrode type of the electrical equipment cannot be set, the user will increase the error rate in the procurement process, and the management, transportation, and storage are inconvenient and uneconomical.

In addition, the electromagnet and the electromagnetic tripping device of this electrical appliance need to act on the moving contact through the control mechanism and its sliding or pivoting device respectively. Obviously, these multiple control mechanisms and sliding or pivoting devices act on the The structure of the moving contact is very complicated, not only the manufacturing cost is high, but also the number of accessories that participate in the control or monitoring of the closing / opening state of the moving and static contacts, such as the auxiliary contact group, is limited, thereby greatly reducing Improve the performance of the product and significantly increase the production cost of the product

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