Yangzhou New Concept Electric Co., Ltd. has independently developed 72.5kV intelligent phase selection (synchronous) HV permanent-magnetic vacuum circuit breaker (hereinafter referred to as "intelligent circuit breaker") at world advanced level by integrating domestic and foreign advanced technologies, adopting the new design concept and applying hi-tech means. With permanent-magnetic mechanism, vacuum arc extinction, integrated sensor and ARM+DSP processor, this intelligent circuit breaker self-adapts to own parameters and the impact of environment, thus being the first choice for the realization of power grid intelligentization.
This product conforms to IEC60298, GB3906-2006, GB/T 11022-1999, DL/T 593-2006, GB 1984-2003 standards, etc.
Major Technical Parameters are shown below:
Rated voltage |
72.5kV |
Rated current |
1600/2000/2500A |
Rated frequency |
50Hz |
Rated short-duration (1 min) power frequency withstand voltage |
160kV |
Rated short-circuit breaking current |
31.5kA |
Thermal stability current(4s) |
31.5kA |
Rated lightning impluse withstand voltage(to earth/break) |
350kV |
Dynamic stability current(peak value) |
80kA |
Rated short-circuit current breaking times |
20 Times |
Operating time |
40-60ms |
Operating voltage |
AC/DC220V |
Mechanical service life |
>10000 times |
Main circuit resistance |
<85uΩ |