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      81001-451-61-R

      SGCT Power Device
      Ships by Thursday, November 12
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Allen-Bradley 81001-451-61-R is a single 1500 A SGCT power device for the PowerFlex 7000 medium-voltage drive family.
      • Manufacturer part number
        81001-451-61-R
      • Shipping
        Swift global dispatch
      • Condition
        New, original product
      • Shipping size (est.)
        29.2cm x 20.7cm x 5.5cm
      • Country of Origin
        USA

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      What happens after you enquire

      • 0

        Review your reference

        Send the complete Allen-Bradley 81001-451-61-R reference, label photographs and required quantity. Include the installed drive assembly and whether a single device or matched set is required.

      • 1

        Confirm the offer

        Review the offered revision, condition, included items and documents against the confirmed installation.

      • 2

        Arrange dispatch

        Confirm quantity, dispatch date, lead-time start and delivery details in the quotation.

      • Match the complete marking

        Include the complete Allen-Bradley 81001-451-61-R marking and any revision or assembly number visible on the item. Include the PowerFlex 7000 drive and affected power-device position.

      • Check the offered item before ordering

        Request available label and connector photos. Have your maintenance team compare the offered 81001-451-61-R with the installed equipment and applicable Allen-Bradley documentation.

      Technical specifications for 81001-451-61-R

      • Manufacturer:
        Allen-Bradley
      • Product Category:
        General Automation
      • Spare Part Number:
        81001-451-61-R
      • Weight:
        1.56 kg
      • Tariff Code:
        8537101190
      • Device technology:
        SGCT
      • Device current class:
        1500 A
      • Device quantity:
        1
      • Assembly form:
        Single device
      • Gate-drive supply check:
        19.6–20.4 V; Offline diagnostic
      • Gating signal:
        Fiber-optic
      View as PDF Ask for Quote

      Information

      Overview Downloads Applications / Compatibility Product Precautions
      • Allen-Bradley 81001-451-61-R belongs to the PowerFlex 7000 switching power structure. Its 1500 A single-device identity must be considered together with the installed drive assembly and the optical gate/feedback circuits.
      Device class: 1500 A SGCT
      Assembly form: Single device
      Diagnostic context: Optical gating and feedback comparison
      The 81001-451-61-R selection identifies a single device in the 1500 A SGCT current class. It is a single spare device, separate from the matched-pair and matched-triple selections. The part is used within the PowerFlex 7000 power-electronics architecture; its device current class is not a complete drive output rating.

      SGCT diagnostics compare feedback before and after an issued gate pulse. For the inverter, unchanged low feedback indicates the feedback-loss path, while unchanged high feedback indicates that the gate pulse may not have reached the device. The diagnostic sequence operates during initial contactor closure and the start process, with additional checks after a drive reset.

      Fault investigation combines device resistance, gate-driver LED status, optical-cable condition and the prescribed Gating Test. The associated nominal 20 V firing supply must be active; the Offline diagnostic specifies 19.6–20.4 V. A device can be faulty without measuring as a complete short, so a kilohm reading alone does not establish health.
      Controller platform reference: PowerFlex 7000 SGCT power structure. Match the installed assembly and the drive service procedure.
      The original technical excerpt for Allen-Bradley 81001-451-61-R covers SGCT diagnostic paths and exact spare-part selection. The separate installation guide covers assembly identification, isolation, optical inspection and diagnostic recovery.
      Original manufacturer pages retain their technical context. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
      System and supply context: The 81001-451-61-R spare is a single device in the 1500 A class. Its use requires the corresponding PowerFlex 7000 assembly; optical interfaces, supplies and other drive hardware are separate unless itemized.

      Application scope: Apply the exact spare selection to the installed power structure after identifying its assembly and diagnostic position. Current class alone does not establish interchangeability with another drive device.
      Prepare Allen-Bradley 81001-451-61-R for its configured installation using these checks.
      Identify the assembly

      Match the exact spare reference, current class and single/matched-set form.

      Isolate medium-voltage energy

      Follow the drive isolation, discharge and verification procedure before opening the power structure.

      Preserve optical routing

      Keep gate and feedback fibers identified and free of pinching or damage.

      Check the firing supply

      Verify the auxiliary supply and seated firing-card power connections under the prescribed test conditions.

      Interpret resistance correctly

      A device need not be a complete short to be faulty; follow the specified test procedure.

      Prove diagnostic recovery

      Resolve the original fault and associated causes before authorizing drive operation.

      Alternative Names

      81001 451 61 R Allen-Bradley 8100145161R

      Technical notes

      Engineering relationship: Gate-drive supply and optical feedback are parts of the drive diagnostic circuit. They do not establish the SGCT blocking voltage, switching frequency or complete drive current rating.

      Installation boundary: Retain phase/device-position identifiers when inspecting the gate driver, supply and fibers. A low suspect resistance can indicate a faulty SGCT without a complete short.

      Technical basis: Rockwell Automation PowerFlex 7000 Troubleshooting Guide, 7000-TG002L-EN-P, February 2020. 81001-451-61-R is the 1500 A single device selection. The optical and gate-supply values describe PowerFlex 7000 SGCT diagnostic conditions, not independent semiconductor voltage or drive-output ratings.

      FAQ View All FAQ

      • What current class and assembly form identify 81001-451-61-R?
        It is a single 1500 A SGCT for the PowerFlex 7000 spare-parts system. It is distinct from the matched pairs and matched triples of the same current class.
      • Can 81001-451-61-R be selected solely because its current class exceeds that of an existing SGCT?
        No. A higher nominal device class does not establish compatibility. Match the exact drive assembly, required device reference and prescribed replacement configuration.
      • When does the drive compare feedback from the position occupied by 81001-451-61-R?
        The inverter diagnostic examines feedback before and after a gate pulse at initial contactor closure and during the start sequence. The firmware also performs diagnostics after a drive reset.
      • Why can a feedback-loss fault associated with 81001-451-61-R require a motor-filter-capacitor investigation?
        The PowerFlex 7000 diagnostic guidance identifies a non-operational motor filter capacitor as another possible cause. For synchronous transfer systems, capacitor condition must be resolved before returning to transfer operation.
      • Does a normal gate auxiliary voltage alone clear 81001-451-61-R for service?
        No. It verifies only one part of the firing circuit. Resistance checks, optical-path integrity, gate-driver status and the prescribed gating test remain necessary to locate the fault.
      • How is a damaged firing-card power connection relevant to 81001-451-61-R?
        A loose or poorly seated connection can prevent the gate driver from operating correctly even when the power supply itself is active. Check the connection at the affected device position.
      • Can the 81001-451-61-R fault be judged only from a zero-ohm short test?
        No. An SGCT may fail without becoming a complete short. Follow the controlled resistance-check procedure and investigate low suspect readings alongside the drive diagnostics.
      • What must be preserved when tracing an inverter fault back to 81001-451-61-R?
        Keep the original phase and device-position fault designation with the physical device, its optical fibers and firing-card connections. That association is needed to compare test results before and after the repair.
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