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Used Isolation Transformers in Kentucky, USA

  • Trusted Seller
    Rex Manufacturing

    Rex Manufacturing

    • Manufacturer: Rex Manufacturing

    The Rex Manufacturing Isolation Transformer is a reliable used unit designed to provide effective isolation and protection in electrical systems. This transformer is ideal for applications requiring noise reducti...

    $4,800 USD
    Covington, KY
  • Hammond DM051KK

    Hammond DM051KK

    • Manufacturer: Hammond

    Hammond Power DM051KK Drive Isolation Transformer, 51kVA, 3Ph, 480 Delta Pri/480Y Sec. Aluminum winding, Nema 3R enclosure, used condition. Dimensions: 23.9" W, 25" D, 28.75" H. Ideal for various industrial appli...

    $2,450 USD
    Louisville, KY
  • Hammond DM051KK

    Hammond DM051KK

    • Manufacturer: Hammond

    Hammond Power DM051KK Drive Isolation Transformer, 51kVA, 3-phase, 480V Delta Pri/480Y Sec. Ideal for general purposes, features aluminum winding, Nema 3R enclosure, and compact dimensions: 23.9"W x 25"D x 28.75"...

    $2,450 USD
    Louisville, KY
  • Hammond DM051KK

    Hammond DM051KK

    • Manufacturer: Hammond

    HAMMOND POWER SOLUTIONS DM051KK Drive Isolation Transformer, used condition. 51kVA, 3-phase, 480 Delta Primary/480Y Secondary, aluminum winding, Nema 3R enclosure. Ideal for general-purpose applications. Dimensio...

    $2,450 USD
    Louisville, KY
  • Hammond DM051KK

    Hammond DM051KK

    • Manufacturer: Hammond

    Hammond Power Solutions DM051KK, used drive isolation transformer, general purpose, 51kVA, 3-phase. Features 480 Delta primary and 480Y/277V secondary voltage, aluminum winding, NEMA 3R enclosure. Dimensions: 23....

    $2,450 USD
    Louisville, KY
  • Hammond DM051KK

    Hammond DM051KK

    • Manufacturer: Hammond

    Used Hammond Power Drive Isolation Transformer, Model DM051KK. 51kVA, 3-phase, 480 Delta Primary, 480Y Secondary. Aluminum winding, Nema 3R enclosure, dimensions 23.9"x25"x28.75". Ideal for robust electrical isol...

    $2,450 USD
    Louisville, KY
  • HPS NMK045KB

    HPS NMK045KB

    • Manufacturer: HPS

    HPS 45 KVA 3-phase transformer, model NMK045KB, with GE safety switch. Input: 480V, Output: 208Y/120V, 60Hz frequency, and 150°C temperature rise. Aluminum winding, ventilated, NEMA 3R, 370lb. Pre-owned. Hammond ...

    $1,450 USD
    Louisville, KY

Overview

Isolation transformers provide electrical separation between the supply and the load to reduce electrical noise, prevent ground loops, and improve personnel and equipment safety. Common in industrial and control applications, they come in dry or oil-filled designs, single- or three-phase, and a wide range of kVA ratings. They protect sensitive electronics and stabilize power for panels, drives, and mobile equipment charging.

FAQ

What should I consider when buying a used isolation transformer?

Check kVA rating, primary/secondary voltages, phase, impedance, insulation condition, nameplate details and test records. Verify oil condition for oil-filled units, look for corrosion or damage, and request recent ratio and insulation resistance tests.

How do I ensure the isolation transformer is shipped safely?

Use a carrier experienced with heavy electrical gear, secure lifting points and skids, drain oil if required and comply with hazmat rules for oil-filled units. Crate or brace the unit, label weight and center of gravity, and insure for transit.

What is the maintenance schedule for an isolation transformer?

Perform visual checks monthly, tighten connections and inspect bushings yearly, carry out insulation resistance and turns-ratio tests annually, do oil sampling and treatment per manufacturer intervals, and use thermography for load checks.