CWB-20KV/(630-4000)A copper conductor high voltage wall bushing

/High-voltage wall bushing for indoor and outdoor copper conductors/High-voltage wall bushing for indoor and outdoor copper conductors
1. Overview
High-voltage wall bushings (hereinafter referred to as bushings) are suitable for rated voltage (~frequency ( ~) On the three-phase AC system power stations and substation power distribution devices, the conductive parts pass through partitions, walls or other grounding objects, and serve as insulation support and fixed connections between external conductors (busbars).
Environmental conditions for use
) Indoor casing
Ambient temperature shall not be higher than +℃ and not lower than ℃
Altitude shall not exceed
The monthly average relative humidity shall not be greater than
The surrounding air should be free from corrosive or flammable gases, water vapor and other obvious contamination
No frequent violent vibration
) Outdoor casing
The ambient temperature should not be higher than +℃ and not lower than ℃
Altitude does not exceed
2. Product Features
The bushing is composed of porcelain parts, metal accessories, mounting flange and conductive bar (rod).
3. Use and Classification
Wall-through porcelain bushings are used in power station and substation power distribution devices and high-voltage electrical appliances. They are used for wires to pass through grounding partitions, walls or electrical equipment shells, and to support conductive parts so that they can Insulated from ground or case.
Wall-penetrating porcelain casings can be divided into indoor and outdoor wall-penetrating porcelain casings according to their usage environment. According to the different conductors passing through its center, it can be divided into busbar wall-penetrating porcelain bushings, copper conductor wall-penetrating porcelain bushings and aluminum conductor wall-penetrating porcelain bushings.
When the copper conductor is directly connected to the busbar, galvanic corrosion is prone to occur, and the temperature of the contact surface rises too high, causing the joint to burn out and affecting the life of the equipment. Therefore, a copper-aluminum transition joint should be used, but it also brings trouble to on-site construction. The above problems can be solved by using aluminum conductor porcelain bushings.
Indoor and outdoor wall-penetrating porcelain bushings are assembled from porcelain parts, conductive rods, metal accessories at both ends and mounting flanges. Busbar wall-penetrating porcelain bushings are assembled from porcelain parts, metal accessories at both ends, busbar plywood and mounting flanges (busbar plywood is usually configured by the user according to the size of the busbar).
The various properties of wall-penetrating porcelain bushings comply with the requirements of the Technical Conditions for High-voltage Wall Porcelain Bushings.
4. Model Description
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5. Installation and Use Instructions
The wall porcelain bushing is suitable for the environment around the installation site under power frequency AC rated power. Power stations and substation power distribution devices with temperatures ranging from ℃ to +℃ and altitudes not exceeding.
Internal wall bushings are not suitable for use in places where the enamel, metal accessories and cement adhesives of the bushings are damaged or are sufficient to reduce the electrical performance of the bushings.
If partial discharge occurs during the operation of the wall porcelain casing, check whether there is any partial peeling off of the aluminum spray layer at the flange or inner cavity of the porcelain casing. If so, temporary pressure equalization measures should be taken promptly.
The wall hole for installing the busbar wall-penetrating porcelain bushing should be opened according to the maximum size of the flange reinforcement.
6. Appearance and installation dimensions
Model

Rated voltage

Rated current

The short-time current per second is not less than

Nominal creepage distance at outdoor end

Power frequency voltage is not less than

Not less than

Bending breaking load is not less than Less than

Dry tolerance

Wet tolerance

Breakdown

Visible corona










































































































































































































































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