Emergency cut-off device

Abstract

The invention discloses an emergency cut-off device. The device comprises a protective bottom shell and a protective upper cover, a circuit breaker is arranged between the protective bottom shell andthe protective upper cover; the circuit breaker comprises two insulating stand columns installed on the protective bottom shell, the upper ends of the insulating stand columns are provided with powerconnection contacts connected with two transmission lines, a conductive plate is arranged between the two power connection contacts, and the protective bottom shell and the protective upper cover areprovided with a circuit cut-off reset mechanism used for circularly achieving circuit cut-off and circuit connection; the protection bottom shell and the protection upper cover are each provided witha heat dissipation assembly, the heat dissipation assemblies achieve sealing under the effect that the circuit cut-off reset mechanism lifts the conductive plate to be powered off, and the heat dissipation assemblies achieve heat dissipation and cooling under the effect that the circuit cut-off reset mechanism pushes the current plate to be powered on. According to the scheme, power-off electric arcs are prevented from being generated when a transmission circuit is cut off, the service life of the emergency cut-off device is prolonged, cooling and heat dissipation are achieved through multipleformed heat dissipation openings, and meanwhile the heat dissipation openings are completely sealed to achieve self-protection.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to an emergency cut-off device. Background technique [0002] In the generation, transmission and use of electricity, power distribution is an extremely important link. The power distribution system includes transformers and various high and low voltage electrical equipment, and the low voltage circuit breaker is an electrical appliance with a large amount of use. [0003] The emergency cut-off device refers to the switching device that can close, carry and break the current under normal circuit conditions and can close, carry and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The division of high and low voltage boundaries is relatively vague. Generally, those above 3kV are called high-voltage electrical applianc...

AI Technical Summary

Problems solved by technology

[0007] To this end, the present invention provides an emergency cut-off device to solve the problem of easy occurrence of power-off arcs in the prior art, which affects the safety of the emergency cut-off device. For emergency cut-off devices with networking functions, the heat generated by electronic components If it cannot be distributed in time, it is easy to burn out the internal components of the emergency cut-off device and affect the service life.

Images