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Power electrical switch cabinet with short-circuit protection function

A power, electrical, short-circuit protection technology, applied in emergency protection circuit devices, substation/switch layout details, electrical components, etc., can solve the problems of insufficient protection strength and inability to close the partition protective shell 1, so as to reduce damage and reduce Damage and increase the effect of protection

Inactive Publication Date: 2020-01-17
黎兴文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the certain hysteresis of the circuit breaker in cutting off the current, it is impossible to close the switch and cut off the current before the arc short circuit causes damage to the electrical components. Breakthrough protection, causing great damage

Method used

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  • Power electrical switch cabinet with short-circuit protection function
  • Power electrical switch cabinet with short-circuit protection function
  • Power electrical switch cabinet with short-circuit protection function

Examples

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Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] see Figure 2-4 , a power and electrical switchgear with short-circuit protection, including a housing 1, a pressure relief device 2, a small busbar room 3, a cable room 4, a relay instrument room 5, a maintenance channel 6, a circuit breaker 7 and a current transformer 8, and the housing 1 The space inside can be divided into four sections: small busbar room 3, cable room 4, relay instrument room 5 and maintenance channel 6. There is a partition betwee...

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Abstract

The invention relates to the technical field of power protection, and discloses a power electrical switch cabinet with a short-circuit protection function. The power electrical switch cabinet comprises a shell, a pressure relief device, a small bus chamber, a cable chamber, a relay instrument chamber, a maintenance channel, a circuit breaker and a current transformer. With the arrangement of an infrared detector I, an infrared detector II and an infrared detector III, an arc light short circuit is detected before damaging the electrical elements at the occurrence stage, the detected information is processed by a signal amplifier and a signal microprocessor, and a circuit breaker is directly commanded to cut off the circuit, so that the protection strength to the arc light short circuit inthe switch cabinet is enhanced, the economic losses caused by the arc light short circuit are reduced, the short circuit faults occurring in the switch cabinet can be effectively positioned, the maintenance speed is increased, and the economic losses caused by shutdown are reduced. Meanwhile, a bus is cut off through the arrangement of a bus protection device, so that the damage caused by the switch cabinet to the adjacent cabinet bodies due to the overlarge current can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of electric power protection, in particular to a short-circuit protection electric power switchgear. Background technique [0002] The switchgear is to open and close, control and protect the electrical equipment in the process of power generation, transmission, distribution and electric energy conversion in the power system. The switchgear needs to be protected by a relatively strict arc short circuit. Once an arc short circuit occurs in the switchgear, The temperature at the point where the arc light occurs is 4 times the temperature of the sun’s surface. Such a high temperature will cause the copper and aluminum bars to melt and vaporize, which will cause the cable to melt, the cable coating to catch fire, and cause the inside of the cabinet to be stained and the protective paint burned. , cleaning is difficult, and at the same time, high-temperature, high-pressure gas may spread to the phase plate body v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/32H02H7/22H02H3/08H02H1/00H02B1/56
CPCH02B1/32H02B1/565H02H1/0015H02H3/08H02H7/222
Inventor 黎兴文
Owner 黎兴文
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