{"product_id":"woodward-9907-173-load-sharing-module-new-original-stock","title":"Woodward 9907-173 Load Sharing Module | New \u0026 Original Stock","description":"\u003ch2\u003eWoodward 9907-173 Load Sharing Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eWoodward 9907-173\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e9907-173\u003c\/strong\u003e Analog Load Sharing Module, operates as a dedicated hardware component for generator real power measurement and proportional governor biasing within multi-generator paralleling networks. The device processes three-phase potential transformer (PT) and current transformer (CT) voltage and current waveforms to calculate true RMS power parameters, subsequently generating physical correction signals to balance total system kilowatts across parallel-connected prime movers.\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\u003e9907-173\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\u003e1.48 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e27.3 cm x 21.3 cm x 5.8 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eApproximately 10 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e95-130 VAC or 190-260 VAC (jumper-selectable), 50-400 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePT Inputs\u003c\/td\u003e\n\u003ctd\u003e3-phase, 100-120 VAC or 200-240 VAC line-to-line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCT Inputs\u003c\/td\u003e\n\u003ctd\u003e3-7 A RMS at full load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Sharing Input\u003c\/td\u003e\n\u003ctd\u003e0-3 VDC (isochronous mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Formats\u003c\/td\u003e\n\u003ctd\u003ePWM (500 Hz, 10-90% duty cycle) or analog 0-5 VDC signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDroop Adjustment\u003c\/td\u003e\n\u003ctd\u003e0-10% speed reduction from zero load to full load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Accuracy\u003c\/td\u003e\n\u003ctd\u003eWithin +\/-2% of full load value (true RMS evaluation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eActuator Loop Feedback Response and Dynamics\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eWoodward 9907-173\u003c\/strong\u003e incorporates specialized circuitry designed to optimize the actuator loop feedback response when executing load balancing actions. By establishing a 0-3 VDC isochronous loop line between paralleled units, the module tracks true RMS real power metrics and instantly translates load imbalances into a dynamic bias output. This output alters the governor speed reference circuit to prevent transient oscillations in multi-engine installations. Thermal heat sink dissipation profiles are structured to sustain stable operational characteristics within enclosed switchgear housings from -40 to +70 deg C without external cooling fans. Furthermore, internal electronic dampening provides significant harmonic distortion suppression on the sensing lines, mitigating the corrupting effects of non-linear loads on the generator busbars.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How is the primary AC power supply input range configured on the 9907-173 hardware interface?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The module accommodates either 95-130 VAC or 190-260 VAC input voltage profiles. Selection between these two distinct working parameters must be executed manually via physical jumper positioning on the terminal block assembly prior to applying line voltage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What type of signal interface is utilized to send bias commands back to the engine governor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The device yields either a 500 Hz pulse-width modulated (PWM) signal with a 10-90% operational duty cycle or a continuous analog 0-5 VDC correction profile. This provides cross-platform hardware compatibility with legacy Woodward 2301 series governor architectures as well as newer electronic speed controls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the unit support hot-swapping or live replacement while the generator bus is energized?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. The 9907-173 uses direct inline CT (Current Transformer) and PT (Potential Transformer) input terminals. Unplugging or hot-swapping the module while under load will cause an open-circuit condition on active current transformers, generating high voltage spikes that will damage terminal components and present severe hazards to personnel.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Transformer Isolation\u003c\/strong\u003e: Ensure all external CT circuits are physically shorted or the generator bus is completely de-energized before terminating or disrupting the CT wiring on terminals to prevent destructive open-circuit voltages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJumper Verification\u003c\/strong\u003e: Verify the correct positioning of the internal voltage-selection jumper (95-130 VAC or 190-260 VAC) matches the local auxiliary utility supply before energizing the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShielding and Routing\u003c\/strong\u003e: Route all low-voltage analog load-sharing lines (0-3 VDC loop) and governor bias lines using dedicated twisted-pair shielded cables. Keep these cables isolated from high-voltage PT and current-carrying AC lines to prevent magnetic noise coupling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Grounding\u003c\/strong\u003e: Mount the module firmly to the industrial enclosure backing plate using standard mechanical fasteners. Connect a heavy-gauge copper grounding strap from the designated chassis ground terminal to the main station ground busbar.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":43475736920154,"sku":"9907-173","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/318._de74c300-b206-4c8c-b19d-af829390efbd.jpg?v=1781071981","url":"https:\/\/www.spareoil.com\/products\/woodward-9907-173-load-sharing-module-new-original-stock","provider":"SpareOil Automation","version":"1.0","type":"link"}