Intelligent switching arc-extinguishing 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: 2015-09-09
合肥市徽腾网络科技有限公司
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[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 switching arc-extinguishing and overvoltage protection device, and relates to the technical field of arc extinction and harmonic cancellation of power systems. The device comprises a vacuum circuit breaker capable of carrying out single-phase operation, a voltage transformer, a three-phase combined-type overvoltage protection apparatus, a microcomputer arc-extinguishing controller, a high-voltage fuse, and a zero sequence current transformer. Three-phase ports of the three-phase combined-type overvoltage protection apparatus are respectively connected with three phases of the high-voltage fuse, and then are connected to a high-voltage isolation switch. A grounding end is connected with the voltage transformer, and then is grounded. A voltage transformer control end of the 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 carrying out single-phase operation. Three-phase ports of the vacuum circuit breaker capable of carrying out single-phase operation are respectively connected with a three-phase high-voltage isolation switch. The zero sequence current transformer is disposed between the grounding end and a grounding point. The device can determine and display fault phases and types according to a signal provided by the current transformer, is high in action speed, and effectively solves problems of arc extinction and harmonic cancellation.
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...
Claims
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Inventor 不公告发明人
Owner 合肥市徽腾网络科技有限公司