Product Details
> Product description and usage
Indoor aluminum conductor wall bushing
1. Overview
High voltage wall bushing (hereinafter referred to as bushing) is suitable for rated voltage (~frequency (~) On the power distribution devices of three-phase AC system power stations and substations, the conductive parts pass through partitions, walls or other grounding objects to serve as insulation support and fixed connections between external conductors (busbars).
Usage environment Conditions
) Indoor casing
Ambient temperature shall not be higher than +℃ and not lower than ℃
Altitude shall not exceed
< br/>The monthly average relative humidity should not be greater than
The surrounding air should be free from corrosive or flammable gases, water vapor and other obvious contamination
No frequent violent vibrations
/> )Outdoor casing
The ambient temperature shall not be higher than +℃ and not lower than ℃
The altitude shall not exceed
The wind speed shall not be greater than /< br/>
The degree of air pollution in the environment in which the product is used is divided into levels I, II, III and IV
No frequent violent vibrations
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 is not suitable for on-site construction. Bringing trouble, the use of aluminum conductor porcelain bushings can solve the above problems.
Indoor and outdoor wall-penetrating porcelain bushings are assembled from porcelain parts, conductive rods, metal accessories at both ends and mounting flanges. The busbar wall-penetrating porcelain bushing is assembled from porcelain parts, metal accessories at both ends, busbar plywood and mounting flange (the busbar plywood is usually configured by the user according to the busbar size).
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
5. Installation and use instructions
The wall ceramic bushing is suitable for power frequency AC rated power, the ambient temperature of the installation site is ℃~+℃, the altitude Not exceeding the power distribution equipment of power stations and substations.
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 should be taken in time. measure.
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
Power frequency voltage is not less than
Not less than
Bending failure load is not less than
Second short-time current is not less than
/> Dry resistance
Wet resistance
Breakdown
*
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