High-voltage wall bushing is a protective bushing used to pass through walls under high-voltage conditions. It is widely used in nuclear power plants and chemical plants to ensure the safe and stable operation of high-voltage systems. Its design emphasizes pressure resistance and sealing performance, uses high-strength materials and advanced structures, meets strict industry standards, and is a key component to ensure the efficiency and safety of high-voltage equipment.
A bushing is a device that allows one or more conductors to pass through a partition (such as a wall or a tank) and isolate the conductors from the partition. Bushings are either capacitive or capacitive graded bushings, where the required voltage grade is achieved by incorporating a conductive material or a semiconducting layer into the insulating material.
Pure porcelain high-voltage wall bushing is a special bushing designed for high-voltage electrical equipment and environment. It is made of high-strength, high-voltage resistant ceramic material and is mainly used to protect wires, cables or other electrical equipment from passing through walls, equipment housings or other protective structures in high-voltage environments. It is known for its high pressure resistance, high temperature resistance, corrosion resistance and insulation performance, and is widely used in high-voltage power systems, power equipment, transmission lines and industrial equipment.
| Capacitive Wall Bushing | Porcelain Wall Bushing | |
|---|---|---|
| Implementation Standard | GB/T 4109-2008 “Insulating bushings for AC voltages above 1000V” IEC60137 | GB/T 4109-2008 “Insulating bushings for AC voltages above 1000V” IEC60137 |
| Product Model | FCRG-L-1/2 F: Organic composite main insulation R: Capacitor type C: Wall bushing G: Dry type, silicone rubber outer insulation L is with LRB type through-type current transformer. If there is no CT, there is no L Where: 1: Rated voltage, unit: kV, 2: Rated current, unit: A | CWW: Anti-fouling outdoor and indoor copper conductor wall bushing 1: Rated voltage kV 2: Rated current A See the attached table for main dimensions and technical parameters of the product |
| Product Features | Dry capacitor insulation, oil-free, airless and porcelain-free High anti-pollution level Maintenance-free Short production cycle | Pure porcelain insulation, no capacitor screen, no oil filling, no air filling Maintenance-free Short production cycle |
| Usage Conditions | Ambient temperature: -50℃~+50℃ Altitude: Standard design is 1000m. If it exceeds 1000m, it shall be in accordance with GB 311 for correction Pollution level: Level III (default level, equivalent to porcelain level IV) or according to customer requirements | Ambient temperature: -50℃~+50℃ Altitude: The standard design is 1000m. When it exceeds 1000m, it shall be corrected according to the national standard. Pollution level: Level III or IV |
| Main Performance Indicators | Rated voltage Ur: 12kV, 24kV, 40.5kV, 72.5kV, 126kV, 252kV Rated current lr: <4000A (larger current requires special customization) Insulation level: (see the table below) Temperature rise: not more than 75K | Rated voltage Ur: 12kV, 24kV, 40.5kV Rated current lr: <4000A (larger current requires special order) Insulation level: (see the table below) Temperature rise: no more than 75K |
| Electrical Test | 60s power frequency withstand, partial discharge test, dielectric loss and capacitance, etc. | 60s power frequency tolerance |
| Operation and Maintenance | Maintenance-free | Maintenance-free |
| Ordering Instructions | Rated voltage and rated current must be provided. If an LRB type current transformer is attached, the number of secondary windings and their performance parameters (such as rated current ratio, winding accuracy level, rated load, etc.) must also be provided; if there are special requirements for installation dimensions, please attach drawings. | Rated voltage, rated current, and installation dimensions are required. |
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