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Used Isolation Transformers

  • Single-Phase Transformers 5kva, 25kva, 30kva

    Single-Phase Transformers 5kva, 25kva, 30kva

      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
    • 3-Phase Iso 30 KVA Transformer,

      3-Phase Iso 30 KVA Transformer, 600 - 208Y/120V, Copper Windings

        REX 30 KVA 3-Phase Isolation Transformer – 600V to 208Y/120V All Copper Windings Condition: In excellent working condition. Price: $1450 Contact for more information or arrange viewing.

        $1,052 USD
        Toronto, Canada
      • 15kVA Isolation Transformer, 3-Ph, 600V

        15kVA Isolation Transformer, 3-Ph, 600V - 220Y/127V - All Copper

          Polaris 15 kVA Isolation Transformer - 600V to 220Y127V 3Ph - All Copper Model: 3PK-015K-ATDY Adjustable Taps All Copper Windings Excellent Condition, tested Price: $1,200 For more details or to arrange a viewing...

          $871 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
          • 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: $1800 50 Kva: 480V -...

              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
              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 --------------------------------------------------------------- 🔧 ...

              $54 USD
              Delson, Canada
            • Trusted Seller
              Emerson Power Transfer Station with

              Emerson Power Transfer Station with Asco Transfer Switch and PLC 208V 3 Phase

              • Manufacturer: Emerson
              • Model: ASCO

              Cat #J7ADTSB30150C5XC BOM: 1032680 Serial # 1069953*-005 RE S/O : CV205806 150 Amps 208 Volts 60 Hz 3 Phase Asco 7000 Series Transfer Switch Palm Tree # LR-000000-011221-LR-09 Picture# 01052021 Bid with Confid...

              $3,995 USD
              Providence, RI
            • Trusted Seller
              Cummins BTPCH Automatic Transfer Switch

              Cummins BTPCH Automatic Transfer Switch Bypass Isolation 3000A 480V 3PH4W ATS425

              • Manufacturer: Cummins

              THIS LISTING IS FOR ONE: CUMMINGS BTPCH-5784327 TRANSFER SWITCH 3000 AMP, 480 VOLT, 3 POLE, 4 WIRE WITH BYPASS ISOLATION NON FUSED NEMA 1 ENCLOSURE, INDOOR RATED APPROX DIMS 50" X 76" X 101" STOCK # ATS425 USED, ...

              $27,000 USD

              Get financing

              Est. $508/mo

              North Hampton, NH
            • Trusted Seller
              ONAN BN400 Transfer Switch Bypass

              ONAN BN400 Transfer Switch Bypass Isolation Switch 400A 480V 3PH 4-POLE - ATS268

              • Manufacturer: Cummins

              This listing is for one: ONAN Bypass Transfer Switch BN400 400 Amp, 3 Phase, 4 Wire, 277/480 Volt Stock# ATS268 The Electric Barn has thousands of Electrical Supplies Terms and Conditions

              $1,900 USD
              North Hampton, NH
            • Trusted Seller
              RUSS ELECTRIC RTBD6003CE, 600A 277/480V

              RUSS ELECTRIC RTBD6003CE, 600A 277/480V 3Ø AUTOMATIC TRANSFER SWITCH- ATS314

              • Manufacturer: RUSS ELECTRIC

              This listing is for one: RUSS ELECTRIC RTBD6003CE ISOLATION BYPASS SWITCH 600 AMP, 3 PHASE, 4 WIRE (ONLY 3 WIRES ARE SWITCHED) STOCK# ATS314 USED/TESTED Terms and Conditions

              $2,000 USD
              North Hampton, NH
            1819202122

            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.