How to solve the phenomenon of because of capacitor breakdown tripping operation
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- source:BREDA CNC Machining
3 times whole calm, and the case that 4 groups of capacitor throw entirely is few. When some when on the high side of content of the harmonic inside period of time, always shed protection to cannot be moved too make, cause fusing of silk of the frit inside some photograph, and inside bring up the rear of frit silk frit cannot be discovered in time, bring about an accident to expand, cause fast break tripping operation. From the point of protective configuration, of capacitor interior breakdown protect a protection of silk of the frit inside the setting, and did not install the back-up protection that brings about an accident to expand -- lopsided voltage protection, make inside bring up the rear of frit silk frit cannot discover in time, cause fast break tripping operation accident, accordingly, protecting configuration to be not perfected is the main reason that causes capacitor accident to expand. Additional, nonsked measuring capacitance also is one of causes that cause an accident to expand. The reaction with because capacitor is in-house the most immediate device is the change of capacitance, and after capacitance measures hand stage, when the measurement that undertakes capacitor capacitance, need to use the measurement technique that demolishs jumper, measure the breakdown that bring about bushing troublesome and possibly to get power because of tearing open outfit jumper and produces bushing leakage oil not only. Accordingly, since investment moves overhaul personnel never has undertaken capacitance is measured, and the protection that did not install breakdown of reaction capacitor interior, when interior individual inside when frit silk fusing, cannot discover in time, cause an accident to expand. Capacitor breakdown improves measure 1.
In each bear has been installed to because shed protective basis too,be protected in loop in group when 4 groups of capacitor are thrown entirely, rectify calm, electric current of bisect group harmonic puts what cause greatly to shed a phenomenon too unresponsive, do not react even, accordingly, in each in group loop has installed bear protection, because communicate contactor to be able to open the bear electric current below normal circumstance only, cannot open fault current, communication contactor changes for ZN-28 vacuum breaker, when harmonic content is high, action at tripping operation, avoid harmonic to be caused to capacitor attaint and inside frit silk fusing. 2.
In each in group protection of voltage of triangle of loop installation mouth is become capacitor when fusing of silk of the frit inside some photograph, capacitive reactance happening changes, differ with other two-phase capacitive reactance, cause breakdown get along with perfect phase voltage is lopsided. Then, in each in group the mouth triangle place of 2 winding of loop voltage transformer installs low the voltage relay that makes calm cost, when fusing of silk of the frit inside one photograph, appear in mouth triangle place lopsided voltage, issue alarm signal, this device can be accurate breakdown of reflective capacitor interior, and do not get systematic ground connection and system the influence of lopsided voltage, exit wounded capacitor in time move. 3.
Measure capacitance to measure difficulty in the light of capacitance regularly, purchased advanced measurement equipment, use full automatic capacitance bridge surveys capacitor group regularly, the capacitance of only station capacitor, do not need to tear open jumper, measure handy and quick, accurate and reliable. Overhaul personnel undertakes capacitance is measured regularly, when capacitor some photograph individual inside after frit silk fusing, capacitance will produce change, should measure so that capacitance decreases, when exceeding 3, exit wounded capacitor in time move. Design and safeguard the neglect that waits for a respect to move possibly to the safety of capacitor bring hidden trouble, accordingly, configure perfect protection, measure capacitance regularly, check erroneous ideas at the outset, ability decreases to avoid capacitor accident to expand even, raise the usable rate of capacitor, prolong the service life of capacitor. CNC Milling CNC Machining