A demolition breaker is a mechanical switching appliance that can switch on, carry and break the current under normal circuit conditions, and can also switch on, carry and break the current for a certain period of time under specified abnormal circuits.

Classification and characteristics of demolition breaker.
1. Multi-oil demolition breaker
Simple to implement and cheap, but due to the large amount of oil, large volume, maintenance workload and prone to explosion and fire phenomenon. Multi-oil demolition breaker are high-voltage demolition breaker with insulating oil as the interrupting medium and the main insulating medium, with a simple structure and low technological requirements, but large in size, with more steel and insulating oil.
2. Oil less demolition breaker
With less oil, the oil tank structure is small and sturdy, with features such as material saving, explosion-proof and fire-proof. Oil less demolition breaker are safe to use, making the distribution device greatly simplified, small size, easy to transport. Oil less demolition breaker structure is simple, long history of use, experienced in operation, at present in the power system is still in the dominant position, China's production of oil less than 20kV demolition breaker for the house type, 35kV and above for the house type.
3.SF6 demolition breaker
Good electrical performance, higher break voltage. The operation and maintenance of equipment and maintenance are very convenient, long maintenance cycle, and good opening and closing performance, small footprint, especially SF6 fully enclosed combination appliances can greatly reduce the area of the substation. Generally speaking, due to the excellent performance of SF6 insulation medium itself, SF6 demolition breaker obtain many excellent characteristics. Break voltage is high. 220kV SF6 demolition breaker only requires a single break, thus the structure is simple, easy to manufacture, installation, commissioning, operation; allow more break times, long maintenance cycle; good breaking performance, SF6 demolition breaker breaking current, short interrupting time, no serious cut-off phenomenon, and breaking capacitive current does not produce re-ignition; not easy to catch fire, safer operation; covers an area of less; high price.
4. Vacuum demolition breaker
Vacuum as insulation and interrupting medium, small volume, light weight, but for the interrupting chamber technology and material requirements are high continuous multiple operations, good breaking performance, short action time, and simple operation and maintenance, high reliability, applicable to the operation of the distribution system more characteristics, in 35kV and below the system is widely used.
5. Air demolition breaker

Air demolition breaker are also called compressed air demolition breaker. The use of pre-stored compressed air to extinguish the arc. Compressed air is not only used as an arc extinguishing and insulating medium, but also as a driving force for transmission. Air demolition breaker short-circuit capacity, fast action time, small size, light weight, no fire hazards, but the structure is complex, expensive, need to install compressed air system, etc., mainly used for 110kV and above on the electrical parameters and break time have high requirements of the system, as well as large generator exports need a large rated current and open circuit occasions. In China, usually used for 110kV and above in high-capacity power systems, has been largely replaced by SF6 demolition breaker.

The scope of application of the blasting demolition breaker.
1. Suitable for hazardous places in zone 1 and zone 2 of sexual gas environment.
2. Suitable for IIA, IIB, IIC class sexual gas environment.
3. applicable to combustible dust environment zone 20, zone 21, zone 22.
4. Suitable for temperature group T1-T6 environment; BDZ52 explosion-proof demolition breaker

5. Suitable for petroleum and petrochemical, chemical, brewing, pharmaceutical, paint, textile, printing and dyeing, military facilities and other sexually dangerous environments.

Characteristics of the demolition breaker.
1. This product is a composite type, the shell is made of glass fiber reinforced unsaturated polyester resin pressed, the interior is equipped with high breaking small demolition breaker components, explosion-proof signal light, the shell adopts safety-enhancing structure with strong waterproof, dustproof, anti-corrosion; impact and other excellent performance, as the main parts of the product are made of engineering plastic so it has strong anti-corrosion performance.
2. The product has been scientifically optimized design, the product structure is light and compact, but the user installation and wiring maintenance space is larger.
3. With overload short-circuit protection function, can be added according to the requirements of leakage protection and other functions.
4. Steel pipe or cable wiring are available.

The role of demolition breaker.

1. Cut off or close the no-load current of high-voltage lines.

2. Cut off or close the load current of the high-voltage line.

3. To cut off or close the fault current in high-voltage lines.

VIDO is a manufacturer of a wide range of professional tools, including chainsaws, demolition breaker, circular saws, etc. We have a wide range of products that are exported overseas and are well recognized by all. If you are interested in VIDO's products, please contact us.