Overcurrent protection relay

Abstract

The invention belongs to the technical field of relays, in particular to an overcurrent protection relay, which includes a base, a movable slot, a protective shell, a side door, a bottom plate, a first link, a second link, a connecting shaft, a fixed cylinder, a slider, a first spring, a connecting rod, a second spring, a connecting block, a fixing block, a fixing plate, a heat dissipation hole, an ash-proof net, a side cover, a ventilation slot, a refrigeration tube, a semiconductor refrigeration sheet, a heat dissipation cavity, a fan, a mounting bracket, a relay body , a micro motor, a gear, a first rack plate, a mounting plate, a second rack plate, a side plate, a movable plate, a fixing rod, a wire incoming slot, a through slot, a pulling rod, a limiting slot, a third spring, a fixingcolumn, a clamping plate, a wire incoming plate and a clamping slot. The fan operates to drive air to enter the ventilation slot from the air inlet hole at one end of the side cover, the air is cooled through the refrigeration tube and the semiconductor refrigeration sheet in the ventilation slot and is then transmitted to the inner part of the protective shell, the relay body in the case of operation is thus cooled, and the service life of the relay is improved.

Description

technical field [0001] The invention belongs to the technical field of relays, in particular to an overcurrent protection relay. Background technique [0002] Overcurrent protection relay: the currently better overcurrent protection relay can integrate protection, single-phase current measurement, and control functions, and realize data sharing and remote control with the remote host through the in-com interface, and through the in-con interface Realize the data sharing and remote control functions with the remote host computer, focusing on its protection functions can be generally summarized as phase elements and grounding elements: inverse time overcurrent protection, short delay protection, overcurrent protection when instantaneous current transformer ratio, Overload alarm, zone interlock, and self-perfect self-test function ensure that the device provides reliable protection for primary equipment. [0003] The existing relays are small in size and many electronic compon...

AI Technical Summary

Problems solved by technology

[0003] The existing relays are small in size and many electronic components are installed inside. Due to the compact installation structure, the electronic components are prone to heat in the working state. Generally, heat dissipation is only achieved by setting cooling holes on the relay housing. However, this type of relay only When the relay with cooling holes is working for a long time, its internal heat cannot be discharged in time. Because the heat cannot be removed in time, some parts will be damaged and the service life of the relay will be reduced. The existing relay is generally fixed and installed, which is inconvenient for wiring and Replacement, the general overcurrent protection relay is installed in the factory, it is easy to vibrate with the vibration of the machine in the factory, so that the cable connecting the relay will be loose and the electrical components inside the relay will be damaged

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