... transformers. Solid-state relay controlled and Phase shifting trigger circuit stepless.5,Electric control system6,Spraying, agitation, filtration ... periphery of the circuitFor Solid-state relay controlled for phase control,promise DiaoLiu,with non-contact, no interference ... --- 4000A, RMS three-phase full-wave ac,Timely setDC, 0 --- 4000A, RMS three-phase full-wave dc,Timely set4,Longitudinal ...