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      Woodward 9907-147N/5501-303L
      Woodward 9907-147N/5501-303L
      Woodward 9907-147N/5501-303L
      Woodward 9907-147N/5501-303L
      Woodward 9907-147N/5501-303L
      Woodward 9907-147N/5501-303L

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      ProTech 203 Overspeed Protection Component

      9907-147N/5501-303L

      Product Information:

      9907-147N/5501-303L is identified with Woodward ProTech 203 base catalog 9907-147, a 24 Vdc de-energize-to-trip overspeed-protection execution. The added N/5501-303L marking is retained exactly because the public manual does not decode that suffix; confirm the supplied nameplate, module position and connection record before replacement.

      Product image is representative; revision or series may vary. Contact us to request a specific version.
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        • PRODUCT OVERVIEW

          What is this product?

          9907-147N/5501-303L is identified with Woodward ProTech 203 base catalog 9907-147, a 24 Vdc de-energize-to-trip overspeed-protection execution. The added N/5501-303L marking is retained exactly because the public manual does not decode that suffix; confirm the supplied nameplate, module position and connection record before replacement.

          Selection basis

          Match the complete 9907-147N/5501-303L marking, documented function, electrical interfaces and receiving installation before replacement; a similar enclosure does not establish compatibility.
        • APPLICATIONS

          Where it may be used

          Application contexts for 9907-147N/5501-303L, based on its documented protech 203 overspeed protection component function and recorded execution.

          Power Generation

          9907-147N/5501-303L protects turbine-generator prime movers with three-channel overspeed voting.

          Industrial Turbomachinery

          High-speed prime movers use 9907-147N/5501-303L for hardware-voted overspeed protection.

          Pipeline Pumping

          9907-147N/5501-303L trips critical pump drivers when two of three speed channels detect overspeed.

          Oil & Gas Compression

          Turbine-driven compressor trains use 9907-147N/5501-303L for independent overspeed shutdown.
      Technical specifications for

      9907-147N/5501-303L

      0 TECHNICAL PARAMETERS
      • Manufacturer:
        Woodward
      • Product Category:
        General Automation
      • Product Family:
        Woodward ProTech 203
      • Base Catalog Number:
        9907-147
      • Retained Additional Marking:
        N/5501-303L; verify against the supplied unit
      • Protection Function:
        Three-channel overspeed protection
      • Trip Philosophy:
        De-energize to trip
      • Supply Execution:
        24 Vdc
      • DC Input Range:
        18–32 Vdc
      • Kernel Arrangement:
        Three independent ProTech 203 units
      • Trip Decision:
        Two-out-of-three hardware voting
      • Official Manual:
        Woodward 85204 Revision H
      • Stock Availability:
        1
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      BUYER INFORMATION

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        Factory Sealed

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      • 03

        Factory New

        New and current product sourced through the manufacturer or authorized supply channel when expressly confirmed in the quotation.

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      Alternative Names

      Woodward 9907-147N/5501-303L 9907-147 5501-303L ProTech 203 9907-147

      Information

      Overview Manuals Trip Logic Power Input Proof Testing

      Features:

      • Woodward ProTech 203 base catalog 9907-147 with a retained N/5501-303L execution marking.
      • 24 Vdc de-energize-to-trip overspeed-protection configuration.
      • Three independent protection units use hardware voting for the trip decision.

      The 9907-147N/5501-303L marking contains Woodward ProTech 203 base catalog 9907-147. The official manual identifies 9907-147 as a 24 Vdc de-energize-to-trip system built from three independent overspeed-protection units whose outputs are combined through hardware voting.

      The public manual does not decode the appended N/5501-303L marking, so it must not be assigned a board type or revision by appearance. Before replacement, record the complete nameplate, enclosure/unit location, terminal assignments, speed-input configuration, trip-voting wiring and proof-test results, then match them to the written quotation.

      The 9907-147N/5501-303L Woodward ProTech 203 Overspeed Protection Component may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
      Woodward 9907-147N/5501-303L documentation and reference links.Important Notice: Official Woodward manual 85204 identifies 9907-147 as a ProTech 203 overspeed-protection execution. Confirm the complete nameplate, option codes, connected equipment and required controlled documents before replacement.

      The ProTech 203 uses three independent protection units and hardware voting. Preserve the individual speed inputs, trip-output wiring and de-energize-to-trip philosophy when matching the 9907-147 execution.

      Official ordering information identifies 9907-147 as the 24 Vdc execution. Confirm the documented 18–32 Vdc input range, isolation, protective devices and terminal polarity before energizing the replacement.

      Record each unit's speed-input configuration, trip setpoint, voting path and proof-test result. The N/5501-303L marking must be matched to the supplied hardware record because the public manual does not decode it.

      Technical notes

      9907-147N/5501-303L: Match the complete order and special marking, documented measurement or protection function, connected hardware and electrical interfaces before replacement. Record the installed configuration and prove the complete affected signal, fault and trip path after commissioning.

      Overspeed Protection Architecture

      Woodward manual 85204 defines 9907-147 as the 24 Vdc, de-energize-to-trip ProTech 203 execution. Three independent protection units supervise speed and feed a hardware voting arrangement; each channel and its final trip path must remain independently testable.

      Configuration and Proof Testing

      The appended N/5501-303L marking is not decoded in the public manual. Match it to the supplied nameplate and controlled hardware record, then reproduce input configuration, setpoints, trip contacts, power wiring and two-out-of-three proof-test evidence before returning the protected machine to service.

      Customs & shipping dimensions / weight

      • Packed shipping dimensions
        Confirmed after final packing
        Final packed dimensions are recorded after protective packing for the supplied configuration.
      • Packed shipping weight
        Confirmed after final packing
        Final gross shipping weight is recorded after protective packing.
      • HS / customs code
        8537101190
        Electrical control/protection apparatus; final classification is confirmed by the destination customs declarant.
      • Country of origin
        Confirm from supplied item
        The actual Woodward item marking and shipment documentation are checked before dispatch.
      • Ships from
        Xiamen, Fujian, China
        The dispatch location, quantity and handling time are confirmed in the written quotation.
      • Customs documents
        Confirmed for the destination
        Invoice, packing-list and origin-document requirements are agreed with the order.
      PRODUCT & ORDER FAQS

      Questions buyers ask about 9907-147N/5501-303L

      • How should the three ProTech 203 speed-input channels be matched before replacement?

        Record the pickup type, speed range, gear-tooth count, input wiring and configured trip setpoint for each independent unit, then compare every value with the approved 9907-147 system record.

      • How should the de-energize-to-trip philosophy be preserved on the 9907-147 execution?

        Trace the normally energized trip path, relay contacts, interposing devices and final shutdown circuit so loss of power or an internal fault produces the same safe-state response after replacement.

      • Which checks are required for the 24 Vdc supply execution?

        Confirm the 18–32 Vdc source, polarity, protective devices, grounding and voltage at each kernel under load before energizing or proving any trip outputs.

      • How should the two-out-of-three trip vote be proved after service work?

        Test each independent unit and its output path in the approved sequence, verify that a single asserted channel does not create an unintended shutdown, and prove the required voted trip without bypasses left active.

      • How should the N/5501-303L marking be handled during configuration matching?

        Retain the marking exactly and compare it with the supplied nameplate, internal module position, connection record and controlled Woodward documentation; the public 85204 manual does not decode the suffix.

      • Which records must be captured before a ProTech 203 unit is removed?

        Capture each speed indication, trip setpoint, test mode, alarm and trip contact state, terminal assignment, jumper or switch position, supply reading and proof-test result.

      • How should magnetic-pickup wiring be validated before recommissioning?

        Check pickup polarity, shield termination, isolation, signal amplitude through the operating-speed range and separation from noise sources, then compare indicated speed across all three units.

      • Which functional evidence should close recommissioning of this execution?

        Retain calibrated speed-injection results, individual alarm/trip points, voted-trip behavior, reset action, power-failure response and confirmation that every temporary bypass has been removed.
      All FAQ
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            Exact 9907-147N/5501-303L identity confirmed at quotation

            Moore Automated supplies 9907-147N/5501-303L only after the complete marking, documented function, connected hardware, electrical interfaces and condition are matched to the written quotation. Preserve the existing installation and configuration records before removal and verify the complete signal or protection path after installation.

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          Moore Disclaimer: Moore Automated's sales automation equipment and related solutions are intended for industrial automation and business operational efficiency improvement purposes only. Product information, technical parameters, and application cases are for reference only and do not constitute an absolute guarantee of performance for any specific industry, scenario, or final application. Actual equipment performance may vary depending on factors such as the usage environment, system integration method, and maintenance conditions. Users should confirm compatibility and safety based on professional technical assessments. Moore Automated assumes no liability for any direct or indirect losses caused by improper use, modification, or failure to operate according to specifications, to the extent permitted by law.

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