Intelligent switch arc-extinguishing and overvoltage protection device
An overvoltage and arc suppression technology, which is applied to emergency protection circuit devices, emergency protection circuit devices, and circuit devices for limiting overcurrent/overvoltage, and can solve the problem of overvoltage protectors without arc suppression and harmonic elimination functions, Life and operation safety threats, single function, etc., to reduce the cost of replacing fuses, reduce insulation breakdown short-circuit accidents and arrester explosion accidents, and reduce workload
Inactive Publication Date: 2015-11-25
WUHU LANDZO ELECTRONICS TECH
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Problems solved by technology
[0002] In the current 3-35KW power system where the neutral point is not directly grounded, the neutral point is grounded through the arc suppression coil, or the neutral point is grounded through high resistance, because various overvoltage protectors have no arc suppression and harmonic elimination functions, or have a single function , so that it cannot effectively avoid the occurrence of accidents such as atmospheric overvoltage, single-phase intermittent arc grounding overvoltage, and ferromagnetic resonance overvoltage caused by the system between phases and phases. These overvoltages affect the life and operation of power system equipment. Security poses a certain threat
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[0010] see figure 1 , an intelligent switch arc suppression and overvoltage protection device, which includes a vacuum circuit breaker LKJKZ capable of single-phase action, a voltage transformer PT, a three-phase combined overvoltage protector LBP, a microcomputer arc suppression controller ZK, and a high-voltage fuse RD, zero sequence current transformer LH;
[0011] The microcomputer arc suppression controller ZK includes a voltage transformer control terminal and a vacuum contactor control terminal;
[0012] The three-phase ports of the three-phase combined overvoltage protector LBP are respectively connected to the three phases of the high-voltage fuse RD and then connected to a three-phase high-voltage isolating switch, and the ground terminal of the three-phase combined overvoltage protector LBP is connected to the voltage transformer PT After grounding, the voltage transformer control terminal of the microcomputer arc suppression controller ZK is connected to the volta...
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The invention provides an intelligent switch arc-extinguishing and overvoltage protection device and relates to the technical field of electric power system arc extinguishing and resonance elimination. The intelligent switch arc-extinguishing and overvoltage protection device comprises a vacuum circuit breaker capable of realizing single-phase motion, a voltage transformer, a three-phase combined overvoltage protector, a high-voltage fuse and a zero sequence current transformer. Three phase ports of the three-phase combined overvoltage protector are respectively connected with three phases of the high-voltage fuse and then are connected with a high-voltage isolation switch, and a grounded end is connected with the voltage transformer and then is grounded. A voltage transformer control end of a microcomputer arc-extinguishing controller is connected with the voltage transformer, and a vacuum contactor control end is connected with the vacuum circuit breaker capable of realizing single-phase motion. Three phase ports of the vacuum circuit breaker capable of realizing single-phase motion are respectively connected with a three-phase high-voltage isolation switch, and the a zero sequence current transformer is arranged between a grounded end and a grounding point. According to the invention, the phase and type of a fault is determined according to signals provided by the voltage transformer and are displayed, the action speed is high, the problems of arc extinguishing and resonance elimination in an overvoltage protection device are effectively solved.
Description
technical field [0001] The invention relates to the technical field of arc suppression and harmonic elimination in electric power systems, in particular to a microcomputer arc suppression and harmonic elimination and overvoltage protection device. Background technique [0002] In the current 3-35KW power system where the neutral point is not directly grounded, the neutral point is grounded through the arc suppression coil, or the neutral point is grounded through high resistance, because various overvoltage protectors have no arc suppression and harmonic elimination functions, or have a single function , so that it cannot effectively avoid the occurrence of accidents such as atmospheric overvoltage, single-phase intermittent arc grounding overvoltage, and ferromagnetic resonance overvoltage caused by the system phase-to-phase and phase-to-ground. Security poses a certain threat. Contents of the invention [0003] The purpose of the present invention is to provide an...
Claims
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IPC IPC(8): H02H9/08H02H9/04
Inventor 不公告发明人
Owner WUHU LANDZO ELECTRONICS TECH