Problems that should be paid attention to when handling faulty capacitors

Since the two poles of the capacitor have the characteristics of residual electric charge, we should first try to discharge its electric charge, otherwise electric shock accidents will easily occur. When handling a faulty capacitor, first open the circuit breaker of the capacitor bank and its upper and lower isolation switches. If a fuse is used for protection, remove the fuse tube first. At this time, although the capacitor bank has self-discharged through the discharge resistance, there will still be some residual charges, so manual discharge must be performed.

When discharging, first fix the grounding end of the grounding wire with the grounding grid, and then use the grounding rod to discharge the capacitor several times until there is no spark or discharge sound, and finally fix the grounding wire. At the same time, it should also be noted that if the capacitor has internal disconnection, fuse blown or poor lead contact, there may be residual charges between its two poles, and these residual charges will not be discharged during automatic discharge or manual discharge. of. Therefore, operators or maintenance personnel should wear insulating gloves before touching the faulty capacitor, and short-circuit the two poles of the faulty capacitor with a short-circuit wire to discharge it. In addition, the capacitors using series connection should also be discharged separately.