... finCan’t produce harmonic, do not need series connecting reactor.Put in signal isolated with switching optical, high EMC protection, good capacity ... need add outside power.Switch operation state has two type, put on and cut off, has indicator for phase not ... voltage >=2000V, switch power dissipation<=2VSwitch pressure drop>=0.05V, put and cut alternation>=30SInsulation strength:2.5kv/1 min arrowed ...