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The product model of the 36KV indoor high voltage circuit breaker is ZN85-40.5. This new type of circuit breaker features a spring operating mechanism installed within the circuit breaker frame, making it more suitable for vertical mounting. Its simple structural design effectively reduces the circuit breaker's depth. It can be used in industrial and mining enterprises, power plants, and substations for switching load current, overload current, and fault current.
1. Opening spring
2. Main shaft
3. Middle pole crank arm
4. Transmission rod
5. Transmission connecting plate
6. Contact spring
7/8/9. Transmission connecting plates
10. Side pole crank arm
11. Rod end spherical bearing
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Project Name |
Parameter value |
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Rated voltage |
36/40.5 kV |
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Rated frequency |
50 Hz |
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Rated current |
1250/1600/2000 A |
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Rated short-time withstand current |
25/31.5 kA |
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Rated peak withstand current |
63/80 kA |
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Rated short-circuit duration |
4 s |
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Rated short-circuit breaking current |
25/31.5 kA |
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Rated short-circuit making current |
63/80 kA |
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Rated operating sequence |
O-0.3s-CO-180s-CO |
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Opening time |
<80 ms |
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Rated short-circuit breaking current and number of breaking operations |
20 times |
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Breaking current of a single capacitor bank |
630 A |
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Back-to-back capacitor bank switching current |
400 A |
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1-minute power frequency withstand voltage test |
95 kV |
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Lightning impulse withstand voltage |
185 kV |
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Mechanical life |
10,000 times |
1. The 36kV Indoor High Voltage Circuit Breaker adopts an integrated design with the vacuum interrupter chamber at the top and the operating mechanism at the bottom, facilitating commissioning;
2. It utilizes a composite insulation structure of air and organic materials, resulting in a compact design and light weight;
3. A simple spring operating mechanism provides maintenance-free operation for 10,000 cycles;
4. The screw-driven mechanism is labor-saving, stable, and has excellent self-locking performance.
Address
Jinlu Industrial Zone, Beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province, China
