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Used Isolation Transformers

  • Trusted Seller
    GT SERIES UPS – UL

    GT SERIES UPS – UL LISTED (5-10KVA) Transformer Power Transformers

    • Manufacturer: GE

    “In good condition.” Features & Benefits • Tower and/or rack design - Maximum site flexibility; all necessary parts delivered in packing box • Backfeed protection as standard - Ensuring site safety without additi...

    $949 USD
    Chico, TX
  • Trusted Seller
    GE DRIVE ISOLATION TRANSFORMER 9T23Q5180

    GE DRIVE ISOLATION TRANSFORMER 9T23Q5180 145.0 KVA 50/60 HZ 3 PH 4.1% 150 C RISE

    • Manufacturer: GE

    “GOOD CONDITION” LIFETIME GEARING HELICAL GEAR, 806609, 13 1/2" OD, 2 1/2" ID, 81 TEETH, 5 UOT LIFETIME GEARINGHELICAL GEAR806609RIGHT HANDOUTSIDE DIAMETER: 13 1/2"FACE WIDTH: 1 5/8"INSIDE DIAMETER: 2 1/2"HUB DIA...

    $3,000 USD
    Coffeyville, KS
  • Trusted Seller
    STACO Energy DU-5 Signal Step

    STACO Energy DU-5 Signal Step Down Transformer with Artisan Time Capsule 438U Power Transformers

    • Manufacturer: Staco

    “Excellent working condition” STACO Energy DU-5 Signal Step Down Transformer with Artisan Time Capsule 438U STACO General Purpose Transformer with: DU-5 Signal Step-Down Isolation Transformer • Power - 250 VA to ...

    $4,615 USD
    Chico, TX
  • 30 kVA 3-Phase Isolation Transformer

    30 kVA 3-Phase Isolation Transformer – 480V to 208Y/120V

      Square D, Sorgel 30 kVA 3-Phase Isolation Transformer – 480V to 208Y/120V Isolation Type Adjustable Voltage taps Price: $1800

      $1,325 USD
      Toronto, Canada
    • 3-Phase Transformers 600V - 208V/220V/240V/280V

      3-Phase Transformers 600V - 208V/220V/240V/280V

        3 kVA Hammond 3ph auto, step-down 600V to 220V - $300 3 kVA Hammond, 3ph. ISO, 600-240V, Cat. No. K39M - SOLD 4.5 kVA Hammond 3ph auto, 600-220V, Auto-transformer - $400 6 kVA Thormag 3ph, 600-220V - $400 6 kVA M...

        Toronto, Canada
      • Tripp Lite Isolation Transformers

        Tripp Lite Isolation Transformers

        • Manufacturer: Tripp Lite - Eaton

        LOT OF 4 Tripp Lite IS250HG 'The Isolator' Isolation Transformer With Faraday Shield Made in Taiwan New - In original packaging

        $760 USD
        Riverview, FL
      • Single-Phase Transformers 5kva, 25kva, 30kva

        Single-Phase Transformers 5kva, 25kva, 30kva 600, 480, 240, 208V

          5 kVA Marcus 1ph Isolation Type, 480V-120/240 - $350. 5 kVA REX 1ph Isolation Type, 208V-210/220/230V, Condition: Like new - $450. 25 kVA Rex single phase transformer. 1ph, 600-240/120 - SOLD 25 kVA Marcus 1ph, 3...

          Toronto, Canada
        • 208-380V transformers 20,30,50, Kva. Step-up

          208-380V transformers 20,30,50, Kva. Step-up 400V, 415V,380Y/220

            Step up transformers 20,25,30,50 kVA. Available. Also, usable 220 - 400V or 230 - 415V all copper windings, Isolation type. 20 Kva: 208,220 – 380,400V - $1100, 25 Kva: 208 - 380V - $1250, 30 Kva, 208-380V ISO - $...

            Toronto, Canada
          • Trusted Seller
            Used Voltage Transformer

            Used Voltage Transformer

            • Manufacturer: RFS Protech LLC

            The information provided is a general overview and is intended for informational purposes only. Specifications and features may vary depending on the model year, customizations, or specific configurations. Key F...

            Texas, USA
          • Trusted Seller
            Used Eaton Voltage Transformer

            Used Eaton Voltage Transformer

            • Manufacturer: Eaton

            The information provided is a general overview and is intended for informational purposes only. Specifications and features may vary depending on the model year, customizations, or specific configurations. Key F...

            Texas, USA
          • Trusted Seller
            Used Square D Voltage Transformer

            Used Square D Voltage Transformer

            • Manufacturer: Square D

            The information provided is a general overview and is intended for informational purposes only. Specifications and features may vary depending on the model year, customizations, or specific configurations. Key F...

            Texas, USA
          • Trusted Seller
            Used Voltage Transformer (B)

            Used Voltage Transformer (B)

            • Manufacturer: Jefferson Electric

            The information provided is a general overview and is intended for informational purposes only. Specifications and features may vary depending on the model year, customizations, or specific configurations. Key F...

            $500 USD
            Texas, USA
          • Trusted Seller
            REX MANUFACTURING BA30JS1

            REX MANUFACTURING BA30JS1

            • Manufacturer: Rex Manufacturing
            • Model: BA30JS1

            30KVA TRANSFORMER 600V - 230Y/133 Power: 30.0 kva

            Burlington, Canada
          • Trusted Seller
            REX MANUFACTURING BA30JS1

            REX MANUFACTURING BA30JS1

            • Manufacturer: Rex Manufacturing
            • Model: BA30JS1

            30KVA TRANSFORMER 600V - 230Y/133 Power: 30.0 kva

            Burlington, Canada
          • Trusted Seller
            ACME Transformer Type FS-2-750 –

            ACME Transformer Type FS-2-750 – 750 VA 50/60 Hz

            • Manufacturer: Acme

            Product Sheet – ACME Transformer FS-2-750 Type: Single-phase Control / Isolation Transformer Brand: ACME Electric Model / Type No.: FS-2-750 --------------------------------------------------------------- 🔧 ...

            $55 USD
            Delson, Canada
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          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.