• monitoring of 3-phase mains:
- voltage in 2 levels (undervoltage and overvoltage) in range 120-277 V (3P+N) or 280-480 V (3P3W )
- phase asymmetry (can be switched off )
- phase sequence
- phase failure
• M480: for circuits 3x 400 V (without neutral)
• M277: for circuits 3x 400 / 230 V (with neutral)
• output contact: 1x changeover 8 A/250 V AC1
• 1-MODULE, DIN rail mounting