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