ZN85-40.5(3AV3) indoor vacuum circuit breaker is a special design which produced by our company and Xi'an High-voltage Electric Apparatus Institute. 40.5kV rated voltage, three-phase and AC 50/60HZ. It applies to mining firms, power house and substation acting as protection and control electric apparatus. It is also applicable in occasions with frequent operation.
1、The arc-extinguish chamber is on the upper part and the mechanism is on the lower part. This structure isconvenient for debug.
2、Complex insulating structire using air and organic material; Compactable dimension and small weight.
3、Vacuum arc-extinguish chamber of Cutler-Hammer Company(USA) and domestic ZMD are both applicable for the VCB.
4、Simple spring operation mechanism is free from maintenance within 10000 times of operations.
5、Lead-screw propeller, easy and stable operation and good self-locking capability.