±500KVDC Pure Porcelain BUSHING

This product uses the capacitor equalizing theory; it uses optimal structural design by special electric field analysis andcalculation; it is light and handy, and it is convenient for installation.The product is made of fire resistant and corrosion resistant material without oil or porcelain. It not only can be used in thecity with high sanitary requirement, but also can be used in the area with severe pollution.This series product consists of primary coil, bushing flanges, and terminal block etc components.The end shield or ground shield is lead out separately to be convenient for test, and it also has good humidity resistance.The insulation resistance is stable and reliable.The secondary terminal block is formed by casting as a whole, it can prevent from turning, so the insulation resistance is stable and reliable.
Wall bushing is used for the power station and substation distribution equipment and high-voltage electrical appliances, for the wires through the ground partitions, walls, or electrical equipment enclosure to support the conductive part to make it right or housing insulation.
according to their use of the environment it can be divided into indoor and outdoor wall bushings. Through the center of the conductor can be divided into the bus ceramic wall bushings, copper conductor wall bushings and aluminum conductor wall bushings.
When the copper conductor and the bus is directly connected, it's very easy to produce galvanic corrosion, the contact surface temperature is too high cause the joints to burn, affecting the life of the equipment, it should be using copper and aluminum transition joints, but to cause trouble for construction, the use of aluminum conductors porcelain The casing can solve these problems.

Indoor and outdoor wall bushings are made by porcelain pieces, conductive rod, both ends of metal accessories and mounting flange assembled. Bus wall bushing is made by the porcelain pieces, both ends of the metal accessories, bus plywood and mounting flange assembly (bus plywood usually with bus size by the user).

Technical parameters:

Rated voltage:500kV

Rated current:1250A

1min power frequency withstand voltage:630kV

DC withstand voltage:±785kV

Polarity reversal test:±560kV

Lighting impulse full wave withstand voltage:1550kV

Operation impulse withstand voltage:1300kV

Dielectric loss tan:≤0.37%

Bending withstand load:5000N

Other HV bushing reference:

Package reference: