Use this multi-functional grid monitor relay from ABB to gauge the frequency and voltage in your single-phase and 3-phase mains supply. It can be configured to turn power on or off. In addition, it detects everything from 10-minutes average voltage and real-time over-voltage to under-voltage, over-frequency and under-frequency, making it ideal for use with power-generation devices. The relay has a backlit LCD display for easy parameter configuration and at-a-glance monitoring. It has a mechanical life of 30,000,000 switching cycles, making it durable and suitable for long-term use.

• DIN rail mounting for easy and tool-free installation
• Housing is rated IP20, so it's touch-proof and protected from objects larger than 12mm in size
• Display size of 36 (L) x 22mm (W) for clear reading
• 300V output operational voltage is suitable for powering low-duty to medium-duty applications

• Electricity transmission and distribution systems
• Manufacturing plants
• Process and packaging equipment

This relay has a net weight of 0.306kg, so you can be sure it won't put strain on your DIN rail.