Intelligent switch arc extinction and overvoltage protection device
An overvoltage and arc suppression technology, which is applied in the direction of emergency protection circuit devices, emergency protection circuit devices, circuit devices, etc. for limiting overcurrent/overvoltage, can solve life and operation safety threats, single function, and overvoltage protection There are no problems such as arc suppression and harmonic elimination functions, so as to reduce the cost of replacing fuses, reduce workload, reduce insulation breakdown short-circuit accidents and arrester explosion accidents.
Inactive Publication Date: 2015-09-23
HEFEI SETSAIL TELECOM
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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 phase-to-phase and phase-to-ground. 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 discloses an intelligent switch arc extinction and overvoltage protection device, and relates to the technical field of electrical power system arc extinction and resonance elimination. The intelligent switch arc extinction and overvoltage protection device comprises a vacuum circuit breaker capable of performing the single-phase motion, a voltage transformer, a three-phase combinative overvoltage protector, a microcomputer arc extinction controller, a high-voltage fuse and a zero sequence current transformer; the three phases of ports of the three-phase combinative overvoltage protector are connected with the three phases of the high-voltage fuse respectively to be connected with high-voltage disconnecting switches, the grounded end is connected with the voltage transformer to be grounded, the voltage transformer control end of the microcomputer arc extinction controller is connected with the voltage transformer, the vacuum contactor control end is connected with the vacuum circuit breaker capable of performing the single-phase motion, the three phases of ports of the vacuum circuit breaker capable of performing the single-phase motion are connected with the three phases of high-voltage disconnecting switches respectively, and the zero sequence current transformer is arranged between the grounded end and a grounded point. According to the intelligent switch arc extinction and overvoltage protection device, fault phases and fault types are judged according to signals provided by the voltage transformer and are displayed, the motion speed is high, and the aims of arc extinction, resonance elimination and the like in the overvoltage protection device are effectively achieved.
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 o...
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IPC IPC(8): H02H9/08H02H9/04
Inventor 不公告发明人
Owner HEFEI SETSAIL TELECOM