Arc-suppression and over-voltage protection device for intelligent switch
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: 2016-09-28
合肥仁德电子科技有限公司
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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 relates to an arc-suppression and over-voltage protection device for an intelligent switch, relating to the technical field of arc suppression and resonance elimination of power systems. The arc-suppression and over-voltage protection device comprises a vacuum circuit breaker capable of performing single-phase action, a voltage transformer, a three-phase combination type over-voltage protector, a micro-computer arc-suppression controller, a high-voltage fuse and a zero sequence current transformer; after being respectively connected with three phases of the high-voltage fuse, a three-phase port of the three-phase combination type over-voltage protector is connected to a high-voltage isolation switch; after being connected with the voltage transformer, the grounded end is grounded; the voltage transformer control end of the micro-computer arc-suppression controller is connected with the voltage transformer; a vacuum contactor control end is connected with the vacuum circuit breaker capable of performing single-phase action; a three-phase port of the vacuum circuit breaker capable of performing single-phase action is respectively connected with a three-phase high-voltage isolation switch; and the zero sequence current transformer is arranged between the grounded end and a grounded point. According to the arc-suppression and over-voltage protection device for the intelligent switch disclosed by the invention, the fault phase and the fault type are judged according to a signal provided by the voltage transformer, and then displayed; the action speed is rapid; and thus, the problems, such as arc suppression and resonance elimination, in the over-voltage protection device can be 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 overv...
Claims
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IPC IPC(8): H02H9/04H02H9/08
CPCH02H9/04H02H9/08
Inventor 李阳
Owner 合肥仁德电子科技有限公司