2017-12-17

SF6 circuit breaker interrupter chamber structure according to the pressure of the interrupter medium is different, divided into double pressure type and single pressure type, but the double pressure type is generally not used because of the complex structure and auxiliary equipment. According to the direction of the blowing arc, it can be divided into double blowing, single blowing, external blowing and internal blowing. According to the direction of movement of the contact, it is divided into

2017-11-13

Sulfur hexafluoride molecular formula SF6, the relative molecular mass of 146.06, under normal temperature and pressure for colorless, tasteless, non-toxic, non-corrosive, non-flammable, non-explosive gas, density of about 5 times the air, the standard state density of 6.0886kg/ cubic meter. It is liquid at low temperature and under pressure and becomes a white solid when frozen. The sublimation temperature is -63.9℃, the melting point is -50.8℃, the critical temperature is 45.55℃, and the criti

2017-10-24

At present, according to the provisions of national technical standards, China's circuit breaker models are generally composed of text symbols and numbers in the following ways: Its representative meaning is: ① - Product letter code, represented by the following letters: S - less oil circuit breaker; D - multi-oil circuit breaker; K - Air circuit breaker; L-sulfur hexafluoride circuit breaker; Z - vacuum circuit breaker; Q - gas production circuit breaker; C - Magnetic blow circuit breaker

2017-10-23

The basic requirements for circuit breakers are as follows: (1) It should be a good conductor in the closing state. (2) In the closing state should have good insulation. (3) When breaking the specified short circuit current, there should be sufficient breaking capacity and the shortest possible breaking time. (4) When the specified short-circuit current is switched on, the contact of the circuit breaker cannot produce fusion welding in a short time. (5) Under the technical conditions given

2017-10-23

According to the installation location of the circuit breaker, it can be divided into indoor and outdoor two kinds; According to the arc extinguishing medium used by the circuit breaker, it can be divided into the following types: (1) Oil circuit breaker. The oil circuit breaker uses insulating oil as the extinguishing medium. Can be divided into multi-oil circuit breaker and low-oil circuit breaker. In the multi-oil circuit breaker, the oil is not only used as an arc extinguishing medium, bu

2017-10-12

Sulfur hexafluoride gas has excellent insulation and arc extinguishing properties, and is called "century gas". Its emergence has caused a very far-reaching innovation in high voltage switchgear. Because sulfur hexafluoride gas has excellent insulation and arc extinguishing performance, it is widely used in today's transmission and distribution switchgear above 110kv and 24kv~36kv generator protection circuit breakers. In the distribution switchgear above 35kv, the electrical industry department