ZN85-40.5 series of indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker), for three-phase AC 50Hz, rated voltage 40.5kV power system for industrial and mining enterprises, power plants and substations as a division Load current, overload current, fault current. The circuit breaker and the operating mechanism adopt the upper and lower arrangement structure, which effectively reduces the depth of the circuit breaker,
The three-phase interrupter and the associated charged body are separated by three independent epoxy insulating sleeves to form a composite insulation structure. The circuit breaker meets the requirements of the air and distance during normal operating conditions and effectively reduces the The size of the circuit breaker. The main conductive circuit vacuum interrupter and dynamic and static conductive connection installed in the insulation tube, so that the phase spacing of only 300mm. The main circuit electrical connection all use fixed connectio, with high reliability. The insulating cylinder is mounted above the circuit breaker fram
For this new type of circuit breaker designed specifically for the spring operating mechanism, installed in the circuit breaker frame, the structural characteristics of the circuit breaker is more suitable for the upper and lower layout, and become the overall structure of the circuit breaker inseparable one section. The design of the machine is simple, the output curve anc its performance are more suitable for the characteristics and requirements of 40.5kV vacuum circuit breaker
The overall layout is reasonable, beautiful, simple. Small size, flexible operation, with reliable electrical performance, long life, easy maintenance, maintenance-free features of
the organization.
The circuit breaker for frequent operation and a variety of occasions and operating conditions more harsh places.
Advantages
1 - with reliable interlock functions, suitable for frequent operation
2 - low noise and energy consumed
3 - simple and robust construction.
4 - high operating reliability
5 - mechanical durability of switch : 20000 times, etc
Fields of application
1 - Transformers and distribution substations
2 - Generator control and protection
3 - Capacitor bank control and protection, etc
mechanical parameter
| name |
unit |
data |
| rated voltage |
KV |
40.5 |
| 1min power frequency withstand voltage(RMS) |
KV |
95 |
| lighting impulse withstand voltage(peak) |
KV |
185 |
| rated frequency |
HZ |
50 |
| rated current |
A |
1250,1600,2000 |
| rated short time withstand current |
KA |
25,31.5 |
| rated peak withstand current |
KA |
63,80 |
| rated short circuit duration |
S |
4 |
| rated short circuit breaking current |
KA |
25,31.5 |
| rated short circuit closing current |
KA |
63,80 |
| rated operation sequence |
|
o-0.3s-co-180s-co |
| breaking time |
MS |
<80 |
| rated short circuit breaking current breaking times |
times |
20 |
| single capacitor bank breaking current |
A |
630 |
| back to back capacitor bank breaking current |
A |
400 |
| rated operating voltage |
V |
AC100,220 DC110,220 |
| mechanical life |
times |
10000 |
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