... on-off operation of contactor, relay, lighting electrical SCBK60 Explosion- Proof Control Box Apply to control the on-off operation of contactor, relay ... AC 50Hz, 220V/380V, DC voltage up to 220.The control box is composed of secure shell, Explosion-proof elements (signal ... reasonable in price.We are sincerely looking for your cooperation! electrical SCBK60 Explosion- Proof Control Box