Three-phase line voltage monitor offering protection against phase loss/reversal, and unbalance; 50/60 Hz, 190-600 VAC (18-30 control VAC) - 8-pin plug in mount (base sold separately) Low cost 3-phase protection for single-side Monitors for phase reversal, phase loss, unbalance % as a function of input voltage Bright LED indicators for ON and FAULT Universal three-phase input: 190-600 VAC Control voltage: 18-30 VAC Highly reliable passive electronics Patented: U.S. Patent No. 5,337,206 8-pin plug in mount (ACS-8 base sold separately) Â