Microcomputer arc-extinguishing, harmonic-eliminating and overvoltage-protecting device
An overvoltage and arc suppression technology, applied in emergency protection circuit devices, emergency protection circuit devices, circuit devices, etc. for limiting overcurrent/overvoltage, can solve the problem of single function, no arc suppression and suppression of overvoltage protectors. Harmonic function, power system equipment life and operational safety threats, etc., to solve the effect of arc suppression and fast action
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[0010] see figure 1 , a microcomputer arc suppression harmonic elimination and overvoltage protection device, which includes high-voltage current-limiting fuse FU, voltage transformer PT, three-phase combined overvoltage protector LBP, vacuum contactor JZ microcomputer arc suppression controller ZK, 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 voltage protector LBP are respectively connected to three-phase high-voltage isolating switches. The ground terminal of the three-phase combined overvoltage protector LBP is connected to the voltage transformer PT to be grounded. There is a high-voltage fuse RD in series between the three-phase port of the voltage transformer PT and the three-phase high-voltage isolating switch, and the microcomputer arc suppression cont...
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