What is the function of the outlet bushing of the high-voltage parallel capacitor?

Sep 02, 2025|

In the construction of a high-voltage capacitor, the outlet bushing and the inlet bushing play a crucial role. The outlet bushing serves as the connection bridge between the internal current of the capacitor and the external circuit. Its design is meticulous, taking into account factors such as current capacity, voltage level, and insulation performance, to ensure the stable discharge of current in a high-voltage environment. So, what are its specific functions?

 

The outlet bushing of the high-voltage parallel capacitor mainly serves the following functions:

● Provide electrical connection: The outgoing bushing is the electrical connection component between the capacitor and the external power grid, ensuring that the capacitor can be connected to the high-voltage lines of the power grid. Through the outgoing bushing, the compensated reactive power of the capacitor can be transmitted to the power grid.

● Insulation function: The outlet bushing of the high-voltage parallel capacitor needs to provide excellent insulation performance to ensure that the electrical connection part of the capacitor will not short-circuit or leak electricity with the ground or other equipment. The insulation material of the outlet bushing usually has a high voltage tolerance to prevent high voltage from damaging the equipment or causing safety hazards.

● Protective function: The outlet bushing also plays a certain physical protective role, preventing the connection terminals of the capacitor from being affected by the external environment, such as rain, dust or mechanical damage. At the same time, the bushing can also prevent external objects from coming into contact with the high-voltage connection terminals, ensuring the safety of the operators.

● Electrical protection: Some of the outgoing bushings of high-voltage parallel capacitors may also be equipped with protective devices, such as fireproof and corrosion-resistant features, to adapt to different working environments and ensure the long-term reliable operation of electrical equipment.

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