Precautions for installation of capacitors

1-When installing capacitors, it is best to use separate flexible wires to connect the wiring of each capacitor to the busbar, rather than using hard busbar connections, to prevent assembly stress from causing damage to the capacitor sleeve and seal, resulting in oil leakage.
2-Any poor contact in the capacitor circuit may cause high-frequency oscillating arcs, increasing the working electric field strength and heating of the capacitor, leading to early damage. Therefore, it is necessary to maintain good contact between the electrical circuit and the grounding part during installation.
3-When capacitors of lower voltage levels are connected in series and operated in a higher voltage level network, measures such as installing insulators equivalent to the operating voltage level should be taken to ensure reliable insulation between the casings of each unit and the ground.
4-When a capacitor is connected in a star configuration and used for a higher rated voltage, and the neutral point is not grounded, the shell of the capacitor should be insulated from the ground.
5-Before installing the capacitor, it is necessary to allocate the capacitance once to ensure phase to phase balance, with a deviation not exceeding 5% of the total capacity. When equipped with relay protection devices, it should also meet the requirement that the balance current error during operation does not exceed the action current of the relay protection.
6-For the wiring of individual compensation capacitors, it should be ensured that for induction motors that are started directly or through variable resistors, the capacitors that improve power factor can be directly connected to the motor's output terminals, and no switching devices or fuses should be installed between the two.