Wire fastening should be properly tightened to avoid excessive effort to damage the terminal or not tighten enough to cause poor contact and burn the terminal.

After replacing the capacitor, it is necessary to clean up the oil stains left over from the old capacitor so as to facilitate the operation observation of the new capacitor.

Because the capacitor may be charged after the fault, it is necessary to wait 3 minutes before contacting the capacitor, and then use the wire to short-circuit discharge the capacitor outlet. Make sure that the capacitor has no residual power before it can be disposed of.

When dealing with faulty capacitors, all the capacitors should be withdrawn from operation before pulling off the isolator switch, otherwise, it is easy to cause the arc pulling of the isolating switch and cause damage.