Product Overview

The Woodward 8444-1109, part of the MFR300 series, is a high-precision multifunction relay and measuring transducer designed for comprehensive grid and generator monitoring. This device serves as an all-in-one solution for tracking electrical parameters in both single-phase and three-phase power systems. By integrating True RMS sensing technology, the MFR300-71M delivers reliable data even in environments characterized by non-linear loads and harmonic distortion. Its primary role is to bridge the gap between field-level power sensing and supervisory control systems, providing the critical data needed for load shedding, generator protection, and facility energy management.

Key Technical Characteristics

The 8444-1109 is distinguished by its high accuracy classes and versatile communication interface, making it suitable for complex industrial networks.

• Manufacturer Woodward

• Model Number 8444-1109 (MFR300-71M)

• Measurement Type True RMS (Root Mean Square) sensing

• Voltage/Current Input Configurable for 5A/10A or 10A/20A secondary current transformer inputs

• Accuracy Standards Class 0.5 for Voltage, Current, and Frequency; Class 1 for Power and Energy (Active/Reactive/Apparent)

• Communication Ports Integrated CANopen and Modbus RTU support for SCADA integration

• Logic Outputs Programmable relay outputs for alarm signaling or trip functions

• Supply Voltage Wide-range 12/24 VDC input (8 to 32 VDC operating range)

• Energy Metrics Real-time tracking of Power Factor (cos phi), energy consumption, and phase angles

• Physical Dimensions 14.6 x 12.8 x 5.0 cm

• Weight Approximately 300 g

• Operating Range -20°C to +70°C (-4°F to +158°F)

Industrial Applications and Operational Use Cases

This monitoring device is a fundamental component for maintaining electrical stability and efficiency across various power-dependent sectors.

• Generator Set Protection Monitoring output quality and providing immediate relay trips for over/under voltage or frequency deviations in standby power systems.

• Smart Grid and Microgrid Management Utilizing Modbus or CANopen protocols to transmit energy data to central controllers for localized grid balancing.

• Industrial Energy Auditing Tracking real and reactive power consumption at the machine level to identify efficiency losses and manage peak demand.

• Switchgear Integration Fitting into compact control panels to provide local visualization and remote telemetry for distribution transformers.

• Harmonic-Rich Environments Maintaining measurement precision in facilities utilizing Variable Frequency Drives (VFDs) or Uninterruptible Power Supplies (UPS) where waveform distortion is common.

The Woodward 8444-1109 combines the durability of a protective relay with the precision of a high-end power meter, ensuring that your electrical infrastructure remains within safe and optimized operational limits.