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      8237-1246

      Overspeed Protection Device
      In Stock
      Ships by Tuesday, September 22
      Fast Shipping Available

      Product Describe：

      Woodward 8237-1246 is a ProTech-GII triple-modular-redundant overspeed protection device. It independently monitors rotating-equipment speed and issues a voted overspeed trip through three isolated protection modules.

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      Technical specifications Information Technical notes FAQ

      Technical specifications for 8237-1246

      Technical specifications for 8237-1246

      • Manufacturer:
        WOODWARD
      • Product Category:
        Gas turbine control
      • Spare Part Number:
        8237-1246
      • Estimated shipping dimensions:
        29x18.8x6cm
      • Weight:
        1.8 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Mounting:
        Bulkhead
      • Power-input arrangement:
        High voltage / low voltage
      • Trip relays:
        Voted
      • Architecture:
        Triple Modular Redundant
      • Voting logic:
        2-out-of-3
      • Speed range:
        0.5 to 32,000 rpm
      • Response time:
        12 ms
      • Speed inputs:
        One MPU or PROX input per module; three total
      • Alarm relay outputs:
        One per module; three total
      • Analog speed outputs:
        One per module; three total
      • Safety certification:
        IEC 61508 SIL 3
      View as PDF Ask for Quote

      Information

      Information

      Overview Manuals Common Applications Product Precautions
      WOODWARD 8237-1246 is a bulkhead-mount ProTech-GII overspeed protection device with high-voltage and low-voltage power inputs and voted trip relays. Its triple modular redundant architecture provides 2-out-of-3 voting for critical rotating-equipment protection.
      • Three independent protection modules
      • 2-out-of-3 voted trip-relay architecture
      • Overspeed and over-acceleration protection
      • Online testing and repair capability

      Record the three speed-input channels, trip and alarm relay wiring, power-source allocation, Modbus settings and configured trip thresholds before replacement. Prove each module and the voted trip path with the turbine or machine in an approved safe state.

      Important Notice: Verify 8237-1246 from the physical marking and current manufacturer documentation before installation or configuration.

      Apter Power 8237-1246 Manuals and Guides
      Apter Power 8237-1246 Product Technical ReferenceApter Power 8237-1246 Installation and Verification Guide

      Important Notice: Use these model-specific records together with the current manufacturer publication and the installed-system documentation.

      Steam turbine protection
      Monitors rotor speed and acceleration and issues a voted shutdown command.
      Gas turbine protection
      Provides redundant overspeed protection with independent module diagnostics.
      Hydro turbine protection
      Applies the documented speed range and fast trip response to hydro units.
      Critical rotating equipment
      Protects reciprocating engines, compressors, motors and plant process equipment where rapid overspeed action is required.
      Read the applicable WOODWARD instructions before work. Verify 8237-1246 and the installed system configuration.
      1
      Verify the complete 8237-1246 part number, hardware revision and bulkhead-mount HV/LV voted-relay configuration.
      2
      Place the protected machine and trip system in the approved maintenance state.
      3
      Record all three speed-sensor inputs, shielding and polarity before disconnection.
      4
      Record high-voltage and low-voltage power-source assignments for each module.
      5
      Capture trip, alarm, analog-output and Modbus wiring and settings.
      6
      Back up overspeed, acceleration and test configuration before replacement.
      7
      Prove each module independently before testing the 2-out-of-3 voted trip path.
      8
      Confirm the final trip action, logs and machine interlocks before release.

      Technical notes

      Technical notes

      Record the three speed-input channels, trip and alarm relay wiring, power-source allocation, Modbus settings and configured trip thresholds before replacement. Prove each module and the voted trip path with the turbine or machine in an approved safe state.

      FAQS

      • What hardware configuration does WOODWARD 8237-1246 use?
        It is the bulkhead-mount ProTech-GII configuration with high-voltage and low-voltage power inputs and voted trip relays.
      • How many protection channels are in WOODWARD 8237-1246?
        The ProTech-GII contains three independent modules, each with its own speed input and protection processing.
      • What voting architecture is used by WOODWARD 8237-1246?
        This model uses a 2-out-of-3 voted trip-relay architecture.
      • What speed range is documented for WOODWARD 8237-1246?
        Manual 26545 specifies a 0.5 to 32,000 rpm operating range for the documented ProTech-GII generation.
      • How quickly can WOODWARD 8237-1246 respond to an overspeed event?
        The manufacturer manual gives a 12 millisecond response time for the applicable voted-output configuration.
      • Which speed sensors can WOODWARD 8237-1246 accept?
        Each module accepts one active or passive magnetic pickup or proximity input, for three speed inputs in total.
      • Can WOODWARD 8237-1246 be tested or repaired online?
        The TMR design supports online testing and repair while the remaining protection channels continue to operate, subject to the approved safety procedure.
      • What must be proved after commissioning WOODWARD 8237-1246?
        Verify each speed input, module diagnostics, configured trip thresholds, alarm and analog outputs, and the final 2-out-of-3 voted shutdown path.
      Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
      Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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