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5

Used same in Ohio, USA

  • Advance Transformer Co,78E6381-001-N,CW Autotransformer Ballast

    Advance Transformer Co,78E6381-001-N,CW Autotransformer Ballast 120/277V 8.4/3.

    • Manufacturer: Advance

    New unused without original box NOS. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictu...

    $750 USD
    Galion, OH
  • North Hills,1117CC,Wideband Transformer Video Isolation

    North Hills,1117CC,Wideband Transformer Video Isolation

      New unused without original box NOS. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictu...

      $85 USD
      Galion, OH
    • Jefferson Electric,423-6FGG-000,Isolation Transformer 20Kva 460V

      Jefferson Electric,423-6FGG-000,Isolation Transformer 20Kva 460V 3Phase

      • Manufacturer: Jefferson Electric

      New unused been in storage. This will be shipped via freight. We will arrange shipping with the buyer. The skidded weight is 243LBS and the measurements are 24"x27"x29". Please see pictures for details and condit...

      $360 USD
      Galion, OH
    • Edwards Signaling,88-100,General Purpose Transformer

      Edwards Signaling,88-100,General Purpose Transformer

      • Manufacturer: Edwards

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $60 USD
      Galion, OH
    • ADVANCE,78E6381-001-N,AUTOTRANSFORMER BALLAST 120/277V 330 VOC

      ADVANCE,78E6381-001-N,AUTOTRANSFORMER BALLAST 120/277V 330 VOC M59 H33 BULBS

      • Manufacturer: Advance

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $200 USD
      Galion, OH

    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.