... frequency:25-70Hz 3.Phase:three phase 4. Power type:AC 400v Surge Protector----DLHKDZ1. Working principle ... sensitive with the transient voltage (surge), when the power of sometimes in transient (surge) of cases, the ... ,System Protector,circuit Breaker,Direct stirck Protection, Power solutions,Power Factor Correction. 4.ContactMobible:+8613940882535TEL:+8641186253365FAX:+8641183615665 Welcome to ...