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ZW8‑12G Series Outdoor High Voltage Vacuum Circuit Breaker
YUANKY
America, Europe, Britain, Australia, Southeast Asia, Philippines, I, Africa, French, Arabic
Yuanky ZW8‑12G series outdoor high voltage vacuum circuit breaker adopts total insulation structure with stable performance and high insulation strength. This combined circuit breaker is assembled by vacuum circuit breaker and isolating knife, it can also serve as disconnecting switch, and equipped with CT23 spring energy storage mechanism supporting electric-driven and manual operating modes. It has rated short-circuit breaking current options of 6.3kA,12.5kA and 20kA, rated current covers 630A and 1250A, the mechanical life can reach 10000 times. It has excellent insulation performance and precise operating parameters including contact gap, tripping & closing time, and the primary and secondary current ratio of current transformer ranges from 50-1250/5, suitable for outdoor power grid protection and control.
Technical Parameters
Item | Unit | Parameters |
|---|---|---|
Rated voltage | kV | 12 |
Rated current | A | 630/1250 |
Rated short-circuit breaking current | kA | 6.3，12.5，20 |
Rated short circuit break and close current(peak) | kA | 16，31.5，50 |
Rated peak withstand current | kA | 16，31.5，50 |
Rated short-time withstand current | kA | 6.3，12.5，20 |
Rated insulation level 1min power frequency withstand voltage(Dry test / Wet test) | kV | To earth & phase-phase:42; Break:48 To earth insulation:34 |
Lighting impulse withstand voltage(Peak value) | kV | To earth & phase-phase:75; Break:85 |
Rated operating sequence | 0-0.3s-CO-180s-CO | |
Mechanical life | times | 10000 |
Break times for rated short break current | times | 30 |
Rated close volt of operating mechanism | V | ≤110, ≤220 |
Rated opening volt of operating mechanism | V | ≤110, ≤220 |
Contactor gap | mm | 11±1 |
Over-travel (compressed length of contactor spring) | mm | 3 |
Asynchronous property of three-phase opening and closing | ms | ≤2 |
Contactor switch-on bouncing time | ms | ≤2 |
Average switch-off speed | m/s | 1.0±0.2 |
Average switch-on speed | m/s | 0.7±0.15 |
Switch-off time (Under highest / lowest operating volt) | s | 0.015-0.05 / 0.03-0.06 |
Switch-ontime | s | 0.025-0.05 |
Main loop resistance of every phase | μΩ | ≤120 |
Primary and secondary current ratio of current transformer | A | 50-1250/5 |
