ZW20-12 outdoor high-voltage vacuum circuit breake

ZW20series circuit breaker use SF6 as the insulationmedium, therefore, it can avoid the accident caused by air. The explosion and pressure relieving device is installed in order to avoid the shell explosion of circuit break caused of abnormal increase of inner pressure of the switch. ZW20series circuit breaker has the advantages such as high credibility, convenient repair and long non-maintenance circle, etc. NOItemUnitParameter1Rated voltagekV122Rated frequencyHz503Rated currentA6304Rated peak value withstand currentkA505Rated time withstand current/4sKA20/46Rated short circuit breaking currentkA20/257Rated short circuit current making cycles(peak value)times508Rated operate sequenceO-0.3s-CO-180s-O9lightning impulse withstand voltageKV75/8510Secondary circuit 1min frequency withstand voltageV95/8011Mechanical lifetimes10000121min power frequency withstand voltage(wet)Phase-to-phase phase-to-earth34/35 kV(dry) Phase-to-phase phase-to-earth42/49 kV13SF6 gas pressureMpa0