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High efficiency high speed current limit motion device

A technology of current-limiting actuator and current-limiter, applied in electrical components, emergency protection circuit devices, etc., can solve the problems of increased short-circuit of outgoing line faults, short-circuit faults impacting the power grid, hidden dangers of power safety, etc., to achieve the effect of short action time

Inactive Publication Date: 2016-10-12
HEFEI JINTONGWEI LOW TEMPERATURE TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In recent years, with the vigorous development of the country, the power industry has also advanced by leaps and bounds, and the scale has become larger and larger. The grid-connected connections between different power supply systems have also been correspondingly frequent, and the number of faulty short circuits in outgoing lines has also increased. Short-circuit faults impact the entire power grid, making power safe. Hidden danger

Method used

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  • High efficiency high speed current limit motion device

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Embodiment Construction

[0007] refer to figure 1 , the present invention is connected in the power grid system, the isolation switch G is closed in use, and the measurement and control unit D passes through a special electronic transformer C, which is an electronic transformer with a high degree of anti-saturation, and can The current signal in the circuit is accurately detected. When the measurement and control unit D detects normal current, almost all of them pass through the fast isolator A with a resistance value of micro-ohm level. Once there is a large-capacity short circuit or a transformer short circuit in the system, the measurement and control unit D collects the current signal detected by the electronic transformer C for analysis and judgment. When a preset start-up value is reached, the measurement and control unit D will send an action signal to the fast isolator A , the fast isolator A will disconnect at high speed within microseconds, and at the same time of disconnection, the fault cu...

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Abstract

A high-efficiency and high-speed current-limiting actuator relates to the field of circuit safety control. It includes fast isolator (A), special high-voltage current limiter (B), electronic transformer (C), measurement and control unit (D), large-capacity overvoltage absorber (E), isolating switch (G), isolating switch (G), electronic transformer (C), and fast isolator (A) are connected in series in sequence, and the measurement and control unit (D) detects the current signal at both ends of the electronic transformer (C) and is connected to the fast isolator (A). The high-voltage current limiter (B) is connected in parallel with the fast isolator (A), and one end of the large-capacity overvoltage absorber (E) is connected to the special high-voltage current limiter (B), and the other end is grounded. The invention has the characteristics of rapid and efficient analysis of actions, removal of fault points, extremely short action time and the like.

Description

technical field [0001] The invention relates to the field of circuit safety control, in particular to an efficient and high-speed current-limiting actuator. Background technique [0002] In recent years, with the vigorous development of the country, the power industry has also advanced by leaps and bounds, and the scale has become larger and larger. The grid-connected connections between different power supply systems have also been correspondingly frequent, and the number of faulty short circuits in outgoing lines has also increased. Short-circuit faults impact the entire power grid, making power safe. Hidden danger. Contents of the invention [0003] The purpose of the present invention is to provide a high-efficiency and high-speed current-limiting actuator, which has the characteristics of rapid and efficient analysis, removal of fault points, and extremely short operating time. [0004] In order to solve the problems existing in the background technology, the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
CPCH02H7/26
Inventor 武行峰
Owner HEFEI JINTONGWEI LOW TEMPERATURE TECH CO LTD
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