Key Features

a) All secondary control components are located directly at the front of the operating mechanism , making inspection and maintenance convenient;

b) Modular functional unit design with a rational structural layout , facilitating maintenance and servicing;

c) Fewer parts , simple structure , and easy operation;

d) The cam directly drives the main shaft to rotate , resulting in high transmission efficiency;

e) Based on a new design concept , no adjustment of latching engagement is required ;

f) Long-life design: mechanical life of 30 ,000 operations for low-current applications and 20 ,000 operations for high-current applications; maintenance-free for 10 ,000 operations , meeting the requirements of Class M2;

g) The mechanism may be fitted with either assembled insulating cylinders or solid-sealed pole main-circuit components;

h) When used at altitudes of 2000 m and below, the insulation requirements can be met without replacing any parts;

I) Direct interchangeability can be achieved with ZN63A (VS1)-12 and VD4-12 products .

 Service Conditions

a) Altitude: areas at 1000 m and below.

b) Ambient temperature: not higher than +40 ° C and not lower than -15 ° C (storage and transportation at - 30 ° C are permitted) .

c) Relative humidity: daily average not exceeding 95% , monthly average not exceeding 90%; saturated   vapor pressure , daily average not exceeding 2 .2 × 10- 3  MPa and monthly average not exceeding 1 .8 × 10- 3 MPa . Condensation may occur when the temperature drops sharply during periods of high humidity.

d) Seismic intensity: not exceeding magnitude 8.

e) The installation site shall be free from dripping water, steam , flammable gas , fire hazards , explosion hazards , chemical corrosion , and severe vibration .

 Technical Data

Main Technical Data of the VS1(ZN63A)- 12 Series Indoor Vacuum Circuit Breaker

Note:

1 . When the rated short-circuit breaking current is ≤ 31 .5 kA , the number of operations at rated short-circuit breaking current is 50.

When the rated short-circuit breaking current is >31 .5 kA , the number of operations at rated short-circuit breaking current is 20.

2 . When the rated short-circuit breaking current is 40 kA , the rated operating sequence is: O-180 s-CO-180 s-CO.

3. Items 11 and 12 are rated parameters to be provided when required.

Mechanical Characteristics of the Circuit Breaker After Assembly and Adjustment

Technical Data of Closing Coil and Opening Coil

Technical Data of Charging Motor