Special-purpose circuit breaker of low-voltage anti-islanding device

An anti-islanding and circuit breaker technology, applied in the protection switch operation/release mechanism and other directions, can solve the hidden dangers of electric maintenance personnel, the inability to detect vacuum circuit breakers, and the inability to eliminate the islanding effect, etc., to achieve reliable performance, precise calculation, elimination of The effect of the island effect

Active Publication Date: 2014-10-08
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The current sensor and microcomputer monitor the vacuum degree of the vacuum bag. It uses wireless transmission signal to receive, but it cannot detect the vacuum circuit breaker above 110,000 KV, so the island effect cannot be eliminated, which brings great safety hazards to electric power maintenance personnel. , and conventional products cannot be energized for a long time, and once tripped, the power must be cut off, otherwise the coil will be burned

Method used

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  • Special-purpose circuit breaker of low-voltage anti-islanding device

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Embodiment Construction

[0008] exist figure 1 Among them, the present invention provides a special circuit breaker for low-voltage anti-islanding device, which is characterized in that it includes an anti-islanding anti-closing part and a line protection part, and the anti-islanding anti-closing part includes a release power terminal, a transformer , anti-closing electromagnet, draw bar, described line protection part comprises current signal acquisition unit, single-chip microcomputer control unit, fault discrimination unit, signal drive unit and tripping mechanism, the output terminal of described current signal acquisition unit and single-chip microcomputer The input terminal of the control unit is connected, the output terminal of the single-chip control unit is connected with the input terminal of the fault discrimination unit, the output terminal of the fault discrimination unit is connected with the input terminal of the signal drive unit, the output terminal of the signal drive unit is connect...

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Abstract

The invention discloses a special-purpose circuit breaker of a low-voltage anti-islanding device. The special-purpose circuit breaker includes an anti-islanding closing part and a line protection part. An output end of a current signal acquisition unit in the line protection part is connected with an input end of a single-chip microcomputer control unit. An output end of the single-chip microcomputer control unit is connected with an input end of a fault judgment unit. An output end of the fault judgment unit is connected with an input end of a signal driving unit. An output end of the signal driving unit is connected with a control end of a tripping mechanism. An operation mechanism of the tripping mechanism is in driving connection with a linkage rod, which is arranged on a closing-preventing electromagnet, through a draw bar. The closing-preventing electromagnet is connected with a tripper power supply terminal through a mutual inductor and a control circuit.

Description

technical field [0001] The invention relates to a special circuit breaker for a low-voltage anti-islanding device. Background technique [0002] The current sensor and microcomputer monitor the vacuum degree of the vacuum bag. It uses wireless transmission signal to receive, but it cannot detect the vacuum circuit breaker above 110,000 KV, so the island effect cannot be eliminated, which brings great safety hazards to electric power maintenance personnel. , and conventional products cannot be energized for a long time, and once tripped, the power must be cut off, otherwise the coil will be burned. Contents of the invention [0003] The invention provides a special circuit breaker for a low-voltage anti-islanding device, which can eliminate the islanding effect and improve safety. [0004] The present invention adopts the following technical solutions: a special circuit breaker for low-voltage anti-islanding device, which is characterized in that it includes an anti-island...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/24
Inventor 戴永正陈厚源顾宇锋钱雨孟宪忠刘波
Owner STATE GRID CORP OF CHINA
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