Relay protection device with dual-protection function

Abstract

The invention relates to the technical field of relay protection. The invention discloses a relay protection device with a dual protection function. According to the invention, when an on-off action is carried out, the contact on an ith control unit assembly and the contact on an (i+1)th control unit assembly move towards each other or away from each other at the same time relative to each other so as to achieve on-off control, therefore, dual protection of on-off can be realized, and the protection performance is improved; and even if the action of one contact goes wrong, the other contact can also realize action disconnection, so that the safety of on-off is effectively improved, and the on-off capability is improved; and the control unit assembly adopts the structural design, on-off control can be well achieved, meanwhile, the structure can be conveniently arranged in the length direction of the main body, and control and arrangement of a plurality of interface contacts can be achieved.

Description

technical field [0001] The invention relates to the technical field of relay protection, in particular to a relay protection device with dual protection functions. Background technique [0002] Relay protection equipment is used in the power system. When the power components in the power system or the power system itself fail to endanger the operation of the power system safety system, the relay protection equipment is used to send a warning signal to the operating personnel on duty, or directly to all An automated measure and device in which a controlled circuit breaker issues a trip command to terminate the development of these events. [0003] The existing relay protection device is equipped with a main body, and the front of the main body is provided with a panel. Under long-term use, the main body will generate a large amount of heat, which affects the stability of its operation. In this way, during maintenance, the operator needs to go around to the rear to complete t...

AI Technical Summary

Problems solved by technology

[0003] The existing relay protection device is equipped with a main body, and the front of the main body is provided with a panel. Under long-term use, the main body will generate a large amount of heat, which affects the stability of its operation. In this way, during maintenance, the operator needs to go around to the rear to complete the plugging and unplugging of the wiring plug, which is extremely inconvenient and may cause accidental contact by the staff

Moreover, the current relay protection devices generally use the relative movement between the moving contact and the static contact to achieve relay protection. Once the moving contact is damaged in this structure, it will cause the moving contact and the static contact to be separated. Due to the lack of protection measures, it will not be possible to realize the circuit breaker or close protection, which will affect the safety.

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