Bird Cap

Wildlife protection

The ABB Capacitor Bird Cap is the solution to problems caused by accidental contact in HV capacitor banks. The Bird Cap used together with insulated wiring between capacitor units will increase the insulation sufficiently to avoid the risk for flash-over or short-circuiting in the bank.

Capacitor bank outings and failures are often caused by accidental contact by animals. Vermin, rodents, cats, birds etc. use the capacitor banks as a resting place or a landing site. When the animal touches the HV live parts this can result in a flash-over that might cause unnecessary interruptions or consequential damages to the whole bank, unless the bank is sufficiently fitted with protection relays.

Easy assembly
The ABB Capacitor Bird Cap is a low cost safety-increasing feature for high voltage capacitor banks. The risk for mechanical problems due to exposure to animals or the atmosphere is kept extremely low. The Bird Cap is designed to fit all ABB standard bushings. It is easily mounted on the bushings after the connecting wire has been fastened. The Bird Cap is suitable for most climatic conditions, pollution levels and temperatures. The polypropylene plastic material ensures a long service life without risk for deterioration of the insulation, and a good capability to endure high temperature.

The benefits of Bird Caps in areas with rich wildlife or heavy pollution is reached by the use of internally fused or fuseless capacitor units. The increased insulation will also further support the compact and cost-efficient design with high power internally fused capacitor units.

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