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      745-W3-P5-G5-HI-A-L-R-E-H

      TRANSFORMER MANAGEMENT RELAY
      In Stock
      Ships by Tuesday, June 23
      Fast Shipping Available

      Product Information:

      745 Transformer Management Relay
      digital transformer protection relay (model 745)
      designed for three-winding transformers (W3) 
      with 5A phase (P5) and ground (G5) inputs

      Warranty Policy
      We provide 1 year warranty for all remaining parts.
      The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
      Return Notice
      The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
      In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
      Shiping Mode
      Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
      Parts Availability
      Moore automated offers a wide range of components, products and services related to industrial automation. We have a large surplus of stocks and are also distributors of new products from a variety of quality manufacturers.
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      Technical specifications for 745-W3-P5-G5-HI-A-L-R-E-H

      • Manufacturer:
        General Electric
      • Product Category:
        PLC System
      • Estimated shipping dimensions:
        20.8x22x24.6cm
      • Weight:
        7.54 kg
      • Tariff Code:
        8537101190
      • Country of origin:
        USA
      • Place of shipment:
        Xiamen, Fujian, China
      • Unit Series:
        745 Transformer Protection Systems
      • Ground Current Inputs:
        5A
      • Ambient Operating Temperature:
        –40°C to +60°C
      • Ambient Storage Temperature:
        –40°C to +80°C
      • CT Inputs::
        5A phase / 5A ground (P5, G5)
      • Stock:
        40
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      FAQ

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      • What is the primary purpose and protection domain of the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H within power transformer control architectures?
        The 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H is a microprocessor‑based transformer protection system from the GE Multilin 745 series, specifically engineered to deliver comprehensive protection, monitoring, and control for three‑winding power transformers deployed in utility and industrial power networks. It integrates multiple protective elements such as differential and overcurrent functions into a single solid‑state relay platform.
      • How does the model designation 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H encode its protective and measurement capabilities?
        In the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H code, “W3” denotes a three‑winding protection configuration, “P5” and “G5” signify 5 A phase and ground current inputs respectively, and the suffix options “HI‑A‑L‑R‑E‑H” represent high control power (HI), analog I/O (A), loss‑of‑life assessment (L), restricted ground fault detection (R), enhanced display (E), and harsh‑environment conformal coating (H).
      • What advanced protective functions are inherent in the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H relay to mitigate transformer faults?
        The 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H provides a suite of protective algorithms, including percent differential protection (87T), overcurrent protection (50/51), under/overvoltage and frequency elements, restricted ground fault detection, and thermal overload assessment. These functions enable rapid fault discrimination across electrical, thermal, and grounding abnormalities.
      • In what ways does the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H facilitate advanced transformer life‑cycle analytics?
        The 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H incorporates “loss‑of‑life” assessment logic, which continuously evaluates transformer insulation aging based on loading history and thermal patterns. This prognostic feature provides operators with actionable insights into remaining insulation life, helping schedule maintenance before critical degradation occurs.
      • Why is the high control power design (“HI”) significant in the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H?
        The “HI” designation in the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H indicates a high control power input range capable of operating on 90–300 VDC or 70–265 VAC, providing flexibility in substations and plant applications where control power supplies vary. This resilience in power supply tolerance enhances relay reliability under grid disturbances.
      • How does the enhanced display (“E”) and harsh environment coating (“H”) improve operational usability for the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H?
        The “E” option on the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H embeds an enhanced LCD and user interface that provides clear status indications, parameter readouts, and fault annunciation without external tools. Additionally, the “H” conformal coating protects internal PCBs against humidity, dust, and corrosive atmospheres, making it suitable for rigorous industrial environments.
      • What monitoring and data capture capabilities does the 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H provide?
        The 745‑W3‑P5‑G5‑HI‑A‑L‑R‑E‑H enables metering and trend recording of key electrical parameters, including phase currents, voltages, and event logs. Event recording functions capture time‑stamped faults and dynamics, facilitating post‑fault analysis and condition‑based maintenance.
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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.