Finder 70.61.8.400.P000 3-Phase Voltage Monitoring Relay, 400 V AC, 1 CO, DIN Rail

In industrial control panels and motor control centers, the Finder 70.61.8.400.P000 monitors three-phase supplies to protect equipment from phase loss, phase sequence errors, overvoltage, and undervoltage. It is used by panel builders and maintenance engineers to prevent motor damage and downtime.

Key specifications

• Monitoring function: phase sequence, phase loss, overvoltage, undervoltage
• Nominal supply voltage: 400 V AC (range 380–415 V AC)
• Output: 1 changeover relay, 6 A, 250 V AC
• Mounting: 35 mm DIN rail, width 2 modules
• Adjustable thresholds: overvoltage and undervoltage 5–20% of Un
• Trip delay: phase loss/sequence fixed 0.5 s, over/undervoltage adjustable 0.1–6 s
• LED indication for supply, relay status, and fault
• Operating temperature: -20 to +60 °C

Why choose it

This relay provides reliable protection for three-phase motors and equipment. Its adjustable thresholds and delays allow precise adaptation to application requirements, while LED indicators simplify commissioning and troubleshooting.

Ideal use cases

• Protecting motors from phase loss or incorrect phase sequence
• Monitoring supply voltage in industrial machinery
• Preventing equipment damage from overvoltage or undervoltage

Good to know

The relay is designed for DIN rail mounting and occupies 2 modules (35 mm). It has a dielectric strength of 2 kV AC between input and output, and the front protection degree is IP40, terminals IP20.