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High-voltage switch protection circuit device applied to power network

Pending Publication Date: 2021-11-23
于曼
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large current when the electromagnet is working, it generates heat quickly. When the mechanism is stuck, the temperature will rise rapidly in a short period of time, and it is easy to generate heat and damage.

Method used

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  • High-voltage switch protection circuit device applied to power network

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] A high-voltage switch protection circuit device applied in a power network, comprising a relay one 1, a relay two 2 and an electromagnet 3 electrically connected together in sequence, the relay one 1 is externally connected to a 220V DC power supply, the relay one 1 and the relay There are normally open contacts in 2 and 2.

[0015] The A1 terminal of the relay one 1 is connected to the positive pole of the 220V DC power supply, the A2 terminal is connected to the negative pole of the 220V DC power supply, the positive output terminal of the power supply of the relay one 1 is connected to the A1 terminal of the relay two 2, and the positive pole of the relay two 2 The output terminal is connected to the positive input terminal of the electromagnet 3, the negative pole of the electromagnet 3 is connected to the terminal A4 of the relay two, and the nega...

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Abstract

The invention discloses a protection circuit device which is applied to a power network and a high-voltage switch operating mechanism and used for protecting an opening and closing electromagnet coil. The protection circuit device comprises a relay I, a relay II and an electromagnet which are electrically connected together in sequence. The relay I is externally connected to a power output end of an original circuit. Normally open contacts are arranged in the relay I and the relay II. Compared with the prior art, the protection circuit device has the advantages that: 1, a delay circuit is designed for the electromagnet, and the delay circuit can meet the working time required when the mechanism is normal, and can protect the coil of the electromagnet without too long power-on time when the mechanism is abnormal; and 2, the operating mechanism can be repeatedly operated under the condition that the operating mechanism is jammed, so that the working reliability of the switch is improved.

Description

technical field [0001] The invention relates to the technical field of high-voltage switches, in particular to a high-voltage switch protection circuit device applied in a power network. Background technique [0002] High-voltage switches can be used in power networks and large and medium-sized factories and mines. The high-voltage switch is also called a high-voltage circuit breaker. Its function is to cut off and connect the load circuit, and cut off the fault circuit in an accident state to prevent the accident from expanding, protect the power system, and ensure the safety of the power grid and electrical equipment. run. [0003] The composition of the high-voltage switch is mainly divided into two parts: the primary conductive circuit body and the operating mechanism. [0004] For the opening and closing operations of high-voltage switches, computer technology is basically used now, and the staff can perform remote operations on the equipment without going to the site...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00H01H47/18
CPCH01H47/002H01H47/18
Inventor 于曼
Owner 于曼
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