ZN85-40.5 series Vacuum Circuit Breaker
Zn85-40.5 indoor AC high voltage vacuum circuit breaker is suitable for AC 50Hz In 35kV Power System, it can be used as protection and control equipment in industrial and mining enterprises, power plants and substations.
Service Condition
Ambient air temperature | ≤40℃ | Altitude | ≤1000m |
Daily average temperature | ≤35℃ | Min ambient air temperature | -25℃ |
Daily average of relative humidity | ≤95% | Monthly average of relative humidity | ≤90% |
Daily average of water vapor pressure | ≤2.2kPa | Monthly average of water vapor pressure | ≤1.8kPa |
Technical data
1. Mechanical parameters
No | Item | Unit | Guarantee Value | ||||
1 | Rated Voltage | kV | 40.5 | ||||
2 | Rated Insulating Level | 1min power frequency withstand voltage (Virtual Value) | kV | 95 | |||
Rated lighting impulse withstand voltage (Peak) | 185 | ||||||
3 | Rated Frequency | Hz | 50 | ||||
4 | Rated Current | A | 630 | 1250 | 1600 | 2000 | |
5 | Rated short-time withstand current | kA | 20 | 25 | 31.5 | ||
6 | Rated Peak withstand current | 50 | 63 | 80 | |||
7 | Rated short-circuit breaking current | 20 | 25 | 31.5 | |||
8 | Rated short-circuit closing current(peak) | 50 | 63 | 80 | |||
9 | Rated short-circuit closing current breaking times | s | 4 | ||||
10 | Operating order | O-0.3S-CO-180S-CO | |||||
11 | Rated short-circuit duration | ms | <80 | ||||
12 | Rated short-circuit breaking current breaking times | times | 20 | ||||
13 | Mechanism life | times | 10000 | ||||
