Vacuum Circuit Breaker 40.5kV
1. General Introduction
ZN85-40.5 series indoor HV AC vacuum circuit breakers are used in the switchgear rated 40.5kV(36 kV), 50(60)Hz. They are suitable for making different types of loads and frequent operation, to protect and control the electric equipments in industrial & mining enterprises, power plants and substations.
ZN85-40.5(36) indoor AC high-voltage vacuum circuit breaker is a vacuum-insulation switching component. The electric conducting part is made with either embedded poles or insulated cylinders. This breaker is integrated with middle-position operation unit to enhance the whole rigidity Reliable closing and opening operation, and inter-lock ensure reliable and safe operation. Operation mechanism and main loop installed upper-lower to ensure enough contacts travel and ensure the safe operation. Free maintenance, high insulation, pollution-proof, low resistance.
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2.Normal Service Condition
- Ambient temperature: -15℃ ~ +40 ℃
- Altitude: ≤1000m
- Relative humidity:daily average relative humidity ≤ 95% monthly average relative humidity ≤ 90% Free from fire, explosion, heavy pollution, chemical corrosion and severe vibration.
- The earthquake intensity ≤ 8 degree
- If the service condition differs from the above , the user should consult it with manufacturer.
3.Technical Parameters
|
No. |
Item |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
40.5(36) |
|
|
2 |
Rated frequency |
Hz |
50(60) |
|
|
3 |
Rated short-time power frequency withstand voltage(1 min) |
kV |
95(70) |
|
|
4 |
Rated lightning impulse withstand voltage |
kV |
185(170) |
|
|
5 |
Rated current |
A |
1250、1600 2000、2500 |
1250、1600 2000、2500 |
|
6 |
Rated short-time withstand current |
kA |
25 |
31.5 |
|
7 |
Rated peak withstand current |
kA |
63 |
80 |
|
8 |
Rated short-circuit breaking current |
kA |
25 |
31.5 |
|
9 |
Rated short-circuit making current |
kA |
63 |
80 |
|
10 |
Rated operating sequence |
/ |
O-0.3s-CO-180s-CO |
|
|
11 |
Short-circuit current breaking times |
times |
274 |
|
|
12 |
Rated capacitor bank breaking current |
A |
630/400 |
|
|
13 |
Mechanical lifespan |
times |
10000 |
|
4. Dimensions (withdrawable type)
