First, an overview

Zn63-12 (VBM7) series of side mounted type vacuum circuit breaker (indoor high voltage switch equipment, suitable for rated voltage of 12kV, frequency 50Hz three-phase power systems, used as protection and control electric appliances, due to the special advantages of vacuum circuit breaker, especially for on the need for frequent operation under the rated current, or many times of breaking short-circuit current.

Zn63-12 (VBM7) series of side mounted type vacuum circuit breaker by fixed installation, mainly used for fixed type switch cabinet, the circuit breaker can used alone, and can be used in the ring network power supply, box type substation or various non standard power supply system.

Two, the use of environmental conditions

1, ambient air temperature: upper limit of +40 degree, lower limit of -40;

2, altitude: less than 200 (HN (if the elevation, is rated insulation level increase);

3, wind pressure: no more than 700Pa (equivalent to the wind speed 34m/s);

4, seismic intensity: no more than 8 degrees;

5, pollution level: grade iv;

6, the maximum daily temperature difference: no more than 25 degrees;

7, relative humidity: daily average of not more than 95%, the average of not more than 90%;

8, non flammable, explosive hazards, chemical corrosion and violent vibration of the place.

Six, ordering instructions

1, circuit breaker name, type and order quantity;

2, circuit breaker rated current and rated short circuit breaking current;

3, the operating mechanism of the type, name, operating voltage and release type;

4, running cars and other spare parts, the number of spare parts;

5, if the user has other special requirements, when ordering negotiation.