What is a tank circuit breaker? What is the difference between a tank circuit breaker and a column circuit breaker?

As a safety guarantee tool, we will see a variety of circuit breakers in the circuit power industry. The tank circuit breakers that are introduced for example today are also representative. It is different from the column circuit breakers used in our ordinary life. Although they are all high-voltage circuit breakers, the circuit breakers have different outer casings. The tank-type circuit breakers are often made of metal materials such as steel, so they are more robust and suitable. In some harsh and special environments.

1. What is the difference between "column circuit breaker" and "can circuit breaker"?

"Column circuit breakers" and "can circuit breakers" are high voltage circuit breakers. The fundamental difference is that the outer casing of the circuit breaker is different.

The outer casing of the column circuit breaker is an insulating material, mostly insulating ceramics, so the column circuit breaker is defined as an insulated casing type circuit breaker. Definition: A sulphur hexafluoride circuit breaker with an organic or inorganic insulating material as an arc chute housing and insulated from the ground, as commonly referred to as a porcelain sleeve strut and/or an insulated barrel circuit breaker.

The outer casing of the tank circuit breaker is made of metal material, mostly steel, so the tank circuit breaker is defined as a metal casing type. Definition: A sulphur hexafluoride circuit breaker that uses metal as the outer casing and is directly grounded, as is commonly referred to as tank and/or closed circuit breakers.

Sulfur hexafluoride is mentioned in the definition. Both circuit breakers use sulfur hexafluoride (SF6) gas as internal insulation and arc extinguishing medium. In the past, oil circuit breakers were used. Oil-free switchgear has a number of advantages, and its usage and market share are increasing rapidly. At present, high-voltage and ultra-high voltage circuit breakers are mainly adjusted and developed in the direction of SF6 circuit breakers. 126kV vacuum circuit breakers will also be in demand; 40.5kV SF6 switches and vacuum switches will go hand in hand, and vacuum switches will prevail; 12kV products will Mainly to the development of the vacuum, these are the mainstream of market development in the future. At present, although there are still a few users still using multi-oil and low oil switches, they should be completely oil-free in the future.

Second, the advantages of tank circuit breakers

The center of gravity is low and the seismic performance is good, which is equivalent to the seismic rating of GIS.

The circuit breaker integrates a feedthrough current transformer and does not require a separate transformer.

On-site installation is simpler than GIS and does not require busbar docking, but is more complex than ceramic column breakers.

It can be used in alpine regions. The treatment method is to add the heating cable to the outside of the tank, and the porcelain column breaker can not be used.

The price is lower than GIS, but much higher than the porcelain column breaker.

At present, the application in the market varies with the voltage level, and there is almost no 126 level. The 252 level is only used in the substation long before the Jingjintang area, and many substations in the 363 and 550 levels are commonly used.

The tank circuit breaker that is specifically introduced today is a representative circuit breaker product. Unlike other conventional circuit breakers, its outer casing is often made of metal. Moreover, it has the characteristics of simple structure, convenient maintenance and high reliability, which can quickly and automatically reclose the operation of the gate, and can restore the normal operation of the line in time when the fault occurs, so it is often used in some demanding environments, in addition, Its rugged and robust features make it stand out in the market, and you can choose to purchase and choose from the above options.