ZW20-12 outdoor HV vacuum circuit breaker is a 3-phase AC 50Hz 12kV outdoor switch equipment
♦ Installation way: pole mounted;
♦ Pole type: integrated pole;
♦ Application: outdoor 12kV substation, power plant.
♦ Operation type: manual, electric, remote control.
Environmental Conditions
♦ Altitude:
♦ Air temperature: -40°C~+40°C; daily temperature change
♦ Wind speed
♦ Filthy level: IV;
♦ Installation places: No fire, explosion hazard, severe chemical corrosion or serious vibration;
♦ Earthquake intensity:
Main Technical Parameters
| NO | Item | Unit | Value | |
| 1 | Rated voltage | kV | 12 | |
| 2 | Power frequency withstand voltage (1min) | (dry) inter-phase, earth/fracture； | kV | 42/48 |
| (wet) inter-phase, earth | 34 | |||
| 3 | Lightning impulse withstand voltage (interphase, earth/fracture) | kV | 75/85 | |
| 4 | Rated current | A | 630,1250 | |
| 5 | Rated frequency | Hz | 50 | |
| 6 | Rated short circuit breaking current | kA | 20, 25 | |
| 7 | Rated peak value withstand current (peak) | kA | 50, 63 | |
| 8 | Rated short time withstand current | kA | 20, 25 | |
| 9 | Rated short circuit making current | kA | 50, 63 | |
| 10 | Rated short circuit duration | S | 4 | |
| 11 | Rated operating sequence | Times | O-0.3S-CO-1 80S-CO | |
| 12 | Rated short circuit breaking current breaking number | Times | 30 | |
| 13 | Mechanical life | Times | 10000 | |
| 14 | Rated operation voltage (can be customized) | IN | 220 | |
| 15 | Opening time | ms | ≤80 | |
| 16 | Closing time | ms | ≤120 | |
| 17 | Fully breaking time | ms | ≤100 | |
| 18 | Rated cable charging breaking current | A | 50 | |
| 19 | Grade | E2~C2~M2(10000) | ||
| 20 | Rated short circuit breaking current breaking number | Times | 30 | |
General Structure Drawing and Installation Size (unit: mm)
Installation ways
