... to AC motor 6KV/10KV/300KW-9000KW 3.It adopts DSP techinque 4.Technique of mutiple SCR WGQH 11kv solid ... technique, and multiple SCR series/parallel to motor, to protect the motor completely.2 . it ... -voltage, under-voltage,over load, open-phase, 3 phase unbalance, over heat, communication fault,2. ... fiber/CT isolation transforming technology, which help to avoid interference of each current, making the ...