This question often arises, and the answer is usually no for the following reasons: • Grounded capacitor banks can interfere with a facilities ground fault protection system and cause the entire facility to lose power (main breaker trip).
The capacitor is for EMI filtering, it is there to reduce common mode noise. Yes they are ground terminals. One is the ground reference for unisolated mains input side, the other one is the ground reference for isolated low voltage output side. Therefore it must be of special type for safety reasons, the type is called an Y capacitor.
The diodes and the capacitor between the planes limit potential differences due to ground bounce, etc. Broken lines inside boxes 1 and 3 indicate ground referenced, non-symmetrical inputs and outputs. Figure 1a shows circuits sharing a common ground run.
Using the lifting eyes on the capacitor bank frame, lift the capacitor bank, positioning it at the pole so that the bolts can slip into the slots on the capacitor bank pole-mounting bracket. (Figure 3) Lower the capacitor bank onto the bolts. Tighten the nuts on the bolts securely. Figure 2. Pole-mounting bracket
Place the other end of the brace against the pole at an angle of approximately 45° and fasten with a 1/2-in. lagscrew or thru bolt. For a snug fit, force the end of the brace attached to the capacitor bank toward the pole and tighten the nut and bolt in the capacitor bank frame.
One is the ground reference for unisolated mains input side, the other one is the ground reference for isolated low voltage output side. Therefore it must be of special type for safety reasons, the type is called an Y capacitor. Your Answer Thanks for contributing an answer to Electrical Engineering Stack Exchange!