1. Could you offer us 11KV vacuum circuit breaker?

11KV is our 12KV, it can be used in 10KV, 11KV, 12KV voltage system.

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2. How to choose a suitable vacuum contactor?

The customer should offer us the rated voltage, rated current and maximum installating size.

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3. Could you produce similar type VCB as ABB VD4?

Yes, we can offer you our type VGD-12 series. It can be installed used as a replacer of VD4.

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4. How to choose a suitable vacuum interrupter?

Firtly, you must tell us the application, used in vacuum contactor, vacuum circuit breaker or vacuum load break switch? Then we need a technical sheets containing rated voltage, rated current, breaking current(if used in VCB), dimension drawing and so on.

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5. What is the material of the contacts inside the vacuum chamber?

For vacuum chamber used in vacuum contactor, the material of the contacts is CuWC. For vacuum chamber used in vacuum circuit breaker, the material of the contacts is CuCr alloy.

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6. What is the main difference between vacuum contactor and vacuum circuit breaker?

Firstly, vacuum contactor is kind of switch can be used to switch on-off frequently. But usually vacuum circuit breaker only switches on-off when the circuit is in failure state(such as short circuit, overload or repair works.). Secondly, the vacuum circuit breaker can break high current(such as 20KA, 25KA, 31.5KA, 40KA …), vacuum contactor can not break such big current.

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