ZN28 (A) - 12 series vacuum circuit breaker is rated voltage 12 kv, three-phase ac fifty hz high indoor switchgear. This product conforms to the GB1984-89 standard, this product structure for switch body and operation mechanism one installation and switch body and operation mechanism separation installation two forms. One-piece mechanism is the basic ZN28, split mechanism for ZN28A - 12 type, suitable for all kinds of stationary switch cabinet.
This product can be with CD17, CD10A type dc electromagnetic operating mechanism and CT17 CT19 type spring-storing type, operation mechanism.
2. The product model and meaning
Z N28-12 (A)/T630 - twenty
Z: vacuum circuit breaker,
N: indoor;
And: design number;
A: mounted;
12: rated voltage (KA);
630: rated current (A);
Twenty: rated short circuit breaking current (KA).
Three. Normal conditions of use
A. environment temperature: cap + and ° c, down - 30 ° c;
B. height above sea level: no more than 2000 m;
C. The wind pressure of no more than 700 pa (equivalent to wind speed 34 m/s);
D. no often violent vibration;
E. antifouling level: III.