Description

EMRI Digital Automatic Voltage Regulator

Technical Specifications

• Product Model: EMRI series AVR
• Brand: EMRI
• Warranty: One Year
• Sensing Input: 3-phase AC generator terminal voltage, 100-480 VAC
• Auxiliary Power: 85-265 VAC / 90-300 VDC wide-range supply
• Output: DC excitation current for generator field winding
• Voltage Regulation Accuracy: ±0.5% of rated voltage
• Response Time: <20 ms fast transient response
• Operating Temperature: -25 °C ~ +70 °C
• Storage Temperature: -40 °C ~ +85 °C
• Protection Class: IP20 panel / rack-mount housing
• Communication: RS-485 Modbus RTU, optional Ethernet for remote monitoring
• Protection Functions: Over-excitation, under-excitation, over-voltage, loss-of-field protection
• System Compatibility: Brushless and brushed synchronous generators, diesel generator sets
• Diagnostics: Local LED status indication, fault code display, event log recording
• Humidity: 5-95 % RH non-condensing
• Weight: 1.8 kg
• Dimensions: Standard panel-mount cutout footprint
• 

Product Overview

EMRI series digital automatic voltage regulator delivers precise terminal voltage control for synchronous generators. It adjusts excitation current in real time according to generator load changes, maintaining stable output voltage while integrating multiple protection functions to safeguard generator and excitation system assets. Widely applied in diesel generator sets, hydro generators and industrial captive power station excitation systems. Surplus and refurbished tested spare AVR unit for power generation equipment maintenance projects.

Application Notes

• Perform voltage calibration and stability tuning after installation.
• Match excitation current rating to generator field winding parameters.
• Typical deployment: Synchronous generator digital AVR spare-part stocking.