Zn12-40.5 circuit breaker is an indoor device with three-phase ac 50Hz and rated voltage of 40.5kv.
The mechanism of the circuit breaker and arc extinguishing chamber system is designed as one, the special Siemens 3AF type spring operating mechanism.Dual - purpose motor is used for ac and dc energy storage operation.It can also be done manually.
This product design has: 350mm, 400mm, 460mm and other phase distance, and it is more convenient to use with different types of switchgear.
It can be used in fixed cabinet xgn17-40.5, kyn10-40.5 and jyn1-40.5.
Zn12-40.5 / t2000-31.5 indoor high voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker), suitable for three-phase ac 50Hz, rated voltage 40.5kv power system, for industrial and mining enterprises, power plants and substations as load current, overload current, fault current.
The circuit breaker and operating mechanism adopt upper and lower arrangement structure, which effectively reduces the depth of the circuit breaker.
The three-phase arc extinguishing chamber and the connected charged body are isolated by three independent epoxy resin insulation cylinders to form a composite insulation structure.The main circuit vacuum arc extinguishing chamber and the static and static conductive connection are installed on the insulation tube, so that the phase spacing is only 300mm.The main circuit electric connection all USES the fixed connection, has the very high reliability.The insulation tube is installed above the circuit breaker frame.
The spring operating mechanism specially designed for this new type of circuit breaker is installed in the framework of the circuit breaker. Its structural characteristics are more suitable for the upper and lower layout of the circuit breaker and become an integral part of the overall structure of the circuit breaker.The mechanism design is simple, the output curve and its performance are more suitable for the characteristics and requirements of 40.5kv vacuum circuit breaker.
The overall layout is reasonable, beautiful and concise.Small size, flexible operation, reliable electrical performance, long service life, convenient maintenance, maintenance mechanism features.
The circuit breaker is suitable for frequent operation and a variety of occasions and operating conditions are harsh places.
Rated short circuit breaking current
Dynamic stable current (peak)
4s thermal stability current (50kA for 3s) rating
Short-circuit closing current (peak)
Rated short circuit current open times
Rated operation sequence
Rated lightning shock withstand voltage (full wave)
Rated short power frequency withstand voltage (1min)
Rated current break times
Energy storage motor power
Rated voltage of energy storage motor
Energy storage time
Close the rated voltage of iron collision
Rated voltage of brake magnet
Energy storage shunt tripper rated voltage close
Interlock rated voltage
Voltage loss trip rated
Overcurrent trip rated current
Auxiliary switch rated current
Contact closing bounce time
Interphase center distance
three-phase contact switching circuit is particularly cyclical