Part 3 of 33 kv relaycontrol panel series in hindi. Operation and working principle of sf6 circuit breaker by learn electrical.
Figure 1 From About Monitoring Of Medium Voltage Circuit
Sf6 circuit breaker control circuit diagram. The innovation of puffer type. In comparison to various other insulating. During operation of sf6 circuit breaker this highly compressed gas is released through the arc in the breaker and collected to a relatively low pressure reservoir and then it is pumped back to the high pressure reservoir for reutilizing. Sulphur hexafluoride sf6 circuit breaker a circuit breaker in which sf 6 under pressure gas is used to extinguish the arc is called sf 6 circuit breaker. Iec indoor sf6 gas circuit breaker hd4 superior performance for smooth protection hd4 breakers are used in electrical distribution for control and protection of cables overhead lines transformer and distribution substations motors transformers generators and capacitor banks. The sulphur hexafluoride gas sf6 is an electronegative gas and has a strong tendency to absorb free electrons.
Sf 6 sulphur hexafluoride gas has excellent dielectric arc quenching chemical and other physical properties which have proved its superiority over other arc quenching mediums such as oil or air. The vacuum circuit breaker has mainly two phenomenal properties. Sf6 has a number of advantages for use as an insulator. Remote control by means of a control circuit. In an sf6 circuit breaker sulphur hexafluoride gas is used as the arc quenching medium. The indicator 10 shows that opening has.
D circuit breaker opening for manual opening press the pushbutton 13. Vacuum circuit breaker has a high insulating medium for arc extinction as compared to the other circuit breaker. The pressure inside the vacuum interrupter is approximately 10 4 torrent and at this pressure very few molecules are present in the interrupter. Arc quenching inside interrupter with diagram explained. The sf 6 circuit breaker is mainly. Quite often it is overwhelming to make sense of the entire scheme at a glance.
When there is a shunt opening release the operation can also be carried out with remote control by means of a control circuit. This video also tell the importance of different. The contacts of the breaker are opened in a high pressure flow sulphur hexafluoride sf6 gas and an arc is struck between them. The dielectric strength of sf6 increases with pressure so smaller breakers can be used at higher voltages. This tutorial will explain 1how a closing circuit2tripping circuit of a cb works. Understanding a breaker scheme is important if you plan on designing a substation.
The indicator 11 shows that closing has been accomplished. The breakers have a smaller footprint so they use less real estate which can be very expensive. This video describes control circuit operation of cb. The working of sf6 circuit breaker is a little bit different in modern time. The figure below depicting a circuit breaker scheme will be used to explain various elements of the pcbs design and its control.
Gallery of Sf6 Circuit Breaker Control Circuit Diagram
