{"product_id":"woodward-8237-1369-protech-gii-overspeed-protection-system","title":"Woodward 8237-1369 ProTech-GII Overspeed Protection System","description":"\u003cp\u003eConfigured for overspeed detection in turbine control systems, the \u003cstrong\u003eWoodward 8237-1369\u003c\/strong\u003e (\u003cstrong\u003e8237-1369\u003c\/strong\u003e Overspeed Protection System) provides direct electrical execution of triple modular redundant (TMR) speed sensing and safety trip logic.\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\u003e8237-1369\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e330 mm x 445 mm x 159 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 deg C to +60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e90 W (HV) \/ 100 W (LV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed Signal Input\u003c\/td\u003e\n\u003ctd\u003e100-32,000 Hz (MPU) \/ 0.5-25,000 Hz (Proximity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrip Output\u003c\/td\u003e\n\u003ctd\u003e8 A at 220 VAC \/ 8 A at 24 VDC\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 Thermal Heat Sink Dissipation Profiles\u003c\/h3\u003e\n\u003cp\u003eThe 8237-1369 utilizes a TMR architecture requiring three independent speed inputs to monitor prime mover rotational frequency. The system performs continuous monitoring for overspeed or signal loss conditions, utilizing a 2-out-of-3 voting logic for shutdown relay execution. To manage high-speed transient response, the internal logic is optimized to process MPU (1-35 Vrms) or proximity probe signals while maintaining thermal heat sink dissipation profiles conducive to cabinet-mounted electronics. The analog 4-20 mA output stages are isolated to ensure speed meter accuracy, and the de-energize-to-trip architecture ensures that the system defaults to a safe state upon internal failure. The input stages must be properly shielded to prevent electromagnetic interference from inducing false counts within the 1-320 gear tooth range.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the system resolve signal discrepancies between the three speed sensing modules?\u003c\/p\u003e\n\u003cp\u003eA: The 8237-1369 uses a voting logic gate to compare the three speed signals. If one sensor input diverges or indicates a failure, the system flags the fault while the remaining two modules continue to provide protection logic, preventing unnecessary turbine trips.\u003c\/p\u003e\n\u003cp\u003eQ: Can the shutdown relay outputs be used for direct actuator control?\u003c\/p\u003e\n\u003cp\u003eA: The shutdown relays are rated for 8 A at 220 VAC or 24 VDC and are intended for safety-critical circuit interruption. Direct high-current inductive load switching should be evaluated for arc suppression requirements to preserve relay contact longevity.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Mount the unit either via bulkhead (wall\/skid) or flush-mount vertically within a cabinet. Ensure the 330 mm x 445 mm x 159 mm envelope has sufficient airflow to comply with the -20 to +60 deg C operating range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIngress Protection:\u003c\/strong\u003e The unit is rated for IP56. Ensure all conduit entries utilize appropriate cable glands and seals to maintain environmental integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Terminate speed signals (MPU or Proximity) using shielded twisted-pair cabling. Ground the shield at the cabinet end only to prevent ground loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundancy:\u003c\/strong\u003e Connect both high-voltage (88-264 VAC \/ 90-150 VDC) and low-voltage (18-32 VDC) power inputs if redundant power sourcing is required to ensure continuous protection during primary source failure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Woodward","offers":[{"title":"Default Title","offer_id":53005278871861,"sku":"8237-1369","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/8237-1369.png?v=1781596247","url":"https:\/\/www.5gplc.com\/products\/woodward-8237-1369-protech-gii-overspeed-protection-system","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}