{"product_id":"woodward-8444-1091-mfr300-series-multifunction-relay","title":"Woodward 8444-1091 MFR300 Series Multifunction Relay","description":"\u003cp\u003eThe \u003cstrong\u003eWoodward 8444-1091\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e8444-1091\u003c\/strong\u003e Multifunction Relay and Measuring Transducer, operates as a dedicated hardware component for multi-phase electrical parameter evaluation, synchronous power network monitoring, and localized generator\/busbar circuit protection within industrial distribution grids.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e8444-1091\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eMFR300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWoodward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.45 kg (0.99 lbs) net module mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e273.6 mm x 214.1 mm x 59.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C (-4 to +158 deg F) continuous plant limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Voltage\u003c\/td\u003e\n\u003ctd\u003e12\/24 VDC nominal operating window (8 to 32 VDC absolute bounds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5 W maximum electrical demand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Inputs\u003c\/td\u003e\n\u003ctd\u003e3 independent True RMS voltage measurement channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Inputs\u003c\/td\u003e\n\u003ctd\u003e3 independent True RMS current measurement channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003eClass 0.5 (Voltage, Frequency, Current) | Class 1 (Real\/Reactive Power \u0026amp; Energy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n\u003ctd\u003eIntegrated CANopen and Modbus industrial network interfaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eProtection Relay Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Drives \u0026amp; Governor Control Loop Networks\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eV\/Hz and Field-Oriented Vector Control Coordination\u003c\/strong\u003e The multifunction relay tracks incoming three-phase voltage and frequency vectors with Class 0.5 precision. When tied into prime mover control topologies, these instantaneous phase metrics provide the tracking baseline needed to manage V\/Hz ratios during generator synchronization, preventing severe reactive torque surges from entering coupled engine shafts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActuator Loop Feedback Response and Thermal Dissipation Profiles\u003c\/strong\u003e The internal microprocessing engine computes true RMS values and matches them against configurable protection profiles within a deterministic execution window. The physical chassis uses an optimized surface-area-to-mass profile to maximize natural convection cooling across its -20 to +70 deg C operating window, allowing the solid-state switching components to drive downstream trip circuit actuators without thermal de-rating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the Class 0.5 and Class 1 accuracy rating profile impact power management system integration?\u003c\/p\u003e\n\u003cp\u003eA: The Class 0.5 rating guarantees a maximum measurement variance of ±0.5% for foundational variables like voltage and current, while the Class 1 rating ensures a ±1.0% tolerance for derived real and reactive power metrics. This tight resolution allows utility-grade power management systems to execute precise load-sharing calculations and microgrid profiling directly from the transducer outputs.\u003c\/p\u003e\n\u003cp\u003eQ: What are the protection consequences if the input operating voltage drops down to the 8 VDC absolute lower bound?\u003c\/p\u003e\n\u003cp\u003eA: The internal power regulation stages maintain stable logic rails across the entire 8 to 32 VDC window. If the supply voltage drops below the 8 VDC threshold during engine cranking or low-battery anomalies, the internal brownout logic triggers a systematic reset, forcing all output protection contacts to transition safely to their de-energized states.\u003c\/p\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":45103339995251,"sku":"8444-1091","price":400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-06-15_15-28-17.png?v=1781508731","url":"https:\/\/www.dcssupplier.com\/products\/woodward-8444-1091-mfr300-series-multifunction-relay","provider":"DcsSupplier Limited","version":"1.0","type":"link"}