Overcurrent protection relay

Abstract

The invention relates to the field of relays and in particular to an overcurrent protection relay, comprising a receiving structure, a fixing plate, a filtering structure, a stopping structure, an on-off structure, a control structure, a resetting structure and a heat dissipating structure. The filtering structure is abutted against the on-off structure so as to shake the filtering structure by the on-off structure, thereby reflecting the on-off state of the on-off structure according to the deformation quantity of the filtering structure, and preventing dust from entering the receiving box soas to improve the stability of use. When a push rod is abutted against a filter screen, the filter screen has a wave-shaped structure so as to increase the deformation quantity of the filter screen while increasing the dust filtration area. The control structure is disposed inside the on-off structure so as to improve the heat dissipation performance inside the receiving structure and prevent theon-off structure from colliding with and damaging the control structure, thereby greatly improving stability.

Description

technical field [0001] The invention relates to the field of relays, in particular to an overcurrent protection relay. Background technique [0002] The overcurrent protection relay integrates protection, single-phase current measurement and control functions, and realizes data sharing and remote control with the remote host through the in-com interface, and realizes data sharing and remote control with the remote host through the in-con interface Function, the overcurrent protection relay realizes the protection of the components through the overcurrent protection action, and the overcurrent protection is generally divided into definite time limit and inverse time limit overcurrent protection, current quick break protection, single-phase grounding protection of the neutral point ungrounded system, It consists of a current relay, a time relay and a signal relay. The current transformer and the current relay form a measuring element, which is used to judge whether the current...

AI Technical Summary

Problems solved by technology

[0003] However, when the traditional over-current protection relay is used in a closed power distribution room, because the signal plate on the over-current protection relay is connected to the inside of the body, dust can easily enter the inside of the over-current relay. When the coil current is too large, The heating of the coil will cause the internal circuit to burn out, and it is inconvenient to dissipate heat inside the relay in a timely manner. When using multiple sets of circuit wiring, when the internal circuit has an overcurrent condition, it is impossible to quickly repair the inside of the relay.

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