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High-efficiency and high-speed current-limiting actuator

A technology of current limiting actuator and current limiter, which is applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc. used to limit overcurrent/overvoltage, and can solve the problem of increased short-circuit of outgoing line faults, hidden dangers of power safety, and short-circuit Fault shocks to the power grid and other problems, to achieve the effect of short action time

Inactive Publication Date: 2016-09-07
合肥慧林建材有限公司
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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 and high-speed current-limiting actuator

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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

The invention provides a high-efficiency and high-speed current-limiting actuator and relates to the field of safety control of circuits. The high-efficiency and high-speed current-limiting actuator comprises a fast isolator (A), a special high-voltage current limiter (B), an electronic transformer (C), a measurement and control unit (D), a high-capacity over-voltage absorber (E) and an isolating switch (G), wherein the isolating switch (G), the electronic transformer (C) and the fast isolator (A) are sequentially connected in series; the measurement and control unit (D) detects current signals at two ends of the electronic transformer (C) and is connected with the fast isolator (A); the special high-voltage current limiter (B) is connected with the fast isolator (A) in parallel; and one end of the high-capacity over-voltage absorber (E) is connected with the special high-voltage current limiter (B) and the other end is grounded. The high-efficiency and high-speed current-limiting actuator has the characteristics that the action is quickly and efficiently analyzed; the fault point is cut off; and the actuation time is extremely short.

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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IPC IPC(8): H02H7/26H02H9/08H02H9/04
CPCH02H7/26H02H9/042H02H9/08
Inventor 刘伍
Owner 合肥慧林建材有限公司
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