RELETEK RM-FVA 3 Phase 125A Voltage & Current Protector

Product Description

The RELETEK RM-FVA 3 Phase 125A Voltage & Current Protector is a three-phase electrical protection device designed to monitor voltage and current conditions and protect high-load electrical equipment from abnormal operating conditions. The 125A version is identified as RPVA3-125 and is intended for three-phase installations where higher current capacity is required.

The protector continuously monitors the electrical supply and can disconnect the connected load when the measured voltage or current exceeds the configured protection limits. It provides adjustable overvoltage, undervoltage, and overcurrent protection, making it suitable for industrial panels, workshops, pumps, motors, compressors, HVAC equipment, and other high-power three-phase loads.

For voltage protection, the device supports an operating voltage range of AC 50–400V and a frequency of 50/60Hz. The overvoltage threshold can be adjusted from 220V to 300V, while the undervoltage threshold can be adjusted from 120V to 210V. Voltage measurement accuracy is specified at ≤1%, allowing the protection thresholds to be configured according to the requirements of the electrical system.

The 125A current rating makes this version suitable for higher-load applications than standard 63A three-phase protection relays. Available product listings identify the RPVA3-125 as a 125A three-phase voltage protection relay, with protection against overload/current faults as well as voltage abnormalities. Some listings also specify protection against phase asymmetry and incorrect phase sequence.

The device provides adjustable timing functions to reduce unwanted tripping during temporary electrical disturbances. The reset/start delay can be configured from 5 to 600 seconds, while the overcurrent fault trip delay is also adjustable from 5 to 600 seconds. The overvoltage trip response is specified at less than 0.1 second, while undervoltage protection has different response times depending on the measured voltage level.

With its digital display, front-panel controls, and modular DIN-rail construction, the RM-FVA/RPVA3-125 can be integrated into electrical distribution and control panels. It is particularly useful where continuous monitoring of three-phase voltage and current is required to reduce the risk of equipment damage caused by unstable supply conditions or excessive load current.

Features

• Three-phase voltage and current protection

• 125A rated current version

• Adjustable overvoltage protection

• Adjustable undervoltage protection

• Adjustable overcurrent protection

• Phase asymmetry protection

• Phase sequence protection

• Adjustable reset/start delay

• Adjustable overcurrent trip delay

• Digital display for monitored electrical parameters

• Front-panel parameter adjustment

• DIN-rail mounting

• Microcontroller-based protection system

Specifications

The 125A rating and RPVA3-125 model identification are supported by product listings specifically for this version.

Applications

• Industrial three-phase distribution panels

• Motors and motor control systems

• Water and irrigation pumps

• Air compressors

• HVAC and refrigeration equipment

• Workshop machinery

• Factory production equipment

• Commercial electrical installations

• High-current three-phase loads

• Electrical control and automation panels