Characteristics

Rated Voltage- 12/24/36KV

Rated Current- 1250A

Rated Frequency- 50Hz

Rated Short Time Withstand Current- 25KA

Rated Duration of Short Circuit- 3sec

Rated SF6 gas pressure at 20 deg C- 1.5bar

1:1 replacement for VOLTAS make FB4 Interrupters of similar ratings

1) cover
2) dynamic seal
3) crank
4) operation rod
5) conical rollers
6) upper current terminal
7) epoxy-resin sealing envelop
8) bottom
9) contact stem
10) valve
11) piston
12) moving contact-arcing
13) fixed contact-arcing
14) insulating nozzle
15) molecular sieve
16) lower current terminal
17) moving contact-main
18) fixed contact-main

Operational Features :

During breaking of the contacts, the puff of gas extinguishes the arc when the circuit breaker is in the closed position.

Due to movement of the piston, the gas is compressed. Firstly, the main contacts open and then the arcing contacts break the contact so as maintain a long life for the main contacts.

Due to this action, the compressed gas is released and it extinguishes the arc Valve opening during the closing operation, helps the piston to move swiftly.