вакуумные дугогасительные TD-12/1250-25 for 12KV Vacuum Circuit Breaker
The vacuum interrupter use ceramics lagging as insulating outer shell. Contact is CuCr metal alloy material. It has advanced technique of arc-extinguish cup construction design. It is small volume and long life.
http://www.jucro.com/products/vacuum-interrupter/td-12kv/
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