The RM-FVA is a DIN rail-mounted monitoring relay designed to protect electrical devices in three-phase systems from unacceptable voltage fluctuations and excessive current. It uses a microcontroller to continuously measure operating voltage and current, tripping the output contact when preset limits are exceeded. The double 3-digit display shows the operating voltage in real time, and fault LEDs indicate the type of event.

Overvoltage and undervoltage thresholds are independently adjustable, and the reset/start delay is configurable from 5 to 600 seconds. The relay requires 3 DIN rail modules and operates from a rated supply of AC 220V. Output contact is 1NO rated for the connected load.

Key Features

• Microcontroller-based voltage and current monitoring for three-phase systems
• Double 3-digit display for live operating voltage
• Overvoltage and undervoltage LED fault indicators
• Adjustable reset/start delay: 5–600s
• Adjustable overcurrent fault trip delay: 5–600s
• Parameter setting via front-panel keys
• 3-module DIN rail mounting

Product Benefits

• Independent threshold settings for over- and under-voltage protect diverse equipment types
• Voltage measurement accuracy ≤1% ensures precise trip points
• Configurable reset delay from 5 to 600 seconds prevents nuisance retripping after transient events
• LED indicators provide an instant visual fault diagnosis without metering tools
• DIN rail mounting integrates into standard distribution boards

Technical Specifications

• Rated Supply Voltage: AC 220V
• Operation Voltage Range: AC 50V–400V
• Rated Frequency: 50/60Hz
• Overvoltage (U>) Setting Range: 220–300V
• Undervoltage (U<) Setting Range: 120–210V
• Hysteresis: 2%
• Reset/Start Delay (Ts): 5s–600s
• Overcurrent Trip Delay (Ta): 5s–600s
• Overvoltage (U>) Trip Delay: <0.1s
• Undervoltage (U<) Trip Delay: ≥120V: 0.5s; <120V: 0.1s
• Overcurrent (I>) Trip Delay: In<Ir *<80A: Ta; Ir *≥Imax: ≤0.1s
• Voltage Measurement Accuracy: 1% (over the whole range)
• Rated Insulation Voltage: 400V
• Output Contact: 1NO
• Protection Degree: IP20
• Mounting: DIN rail, 3 modules

Why You'll Love It

• Adjustable over- and under-voltage thresholds adapt to the specific protection needs of any installation
• Double 3-digit display gives a constant real-time voltage read-out on the panel
• Configurable delays prevent spurious trips and allow controlled restart after a fault clears
• Package includes 1× RM-FVA Three-Phase Monitoring Relay V-I-F 63A 3NO DIN Rail