Monitors overvoltages and undervoltages for 3-phase 3-wire or 4-wire power supplies, in one unit. Switch setting for 3-phase 3-wire or 3-phase 4-wire power supply.

• Overvoltages or undervoltages: operation time setting from 0.1 to 30s
• Relay warning status can easily be monitored using the LED indicator
• Separate outputs possible for overvoltages and undervoltages
• Reset method: automatic
• Power ON lock: 1s or 5s