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Used Isolation Transformers

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    93 KVA, 460V PRI, 460/266 V SEC, GENERAL ELECTRIC OUTDOOR TRANSFORMER

    • Manufacturer: GE

    Inventory id: 12139300000 | Rating: 175 | Primary voltage: 460 | Secondary voltage: 460 / 266 | Phase: 3 | Hertz: 60 | Taps above and below: N/A | Taps voltages: 485, 460, 439 | Impedance: 4.2 | Weight: 605 | Cl...

    Pittsburgh, PA
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    175 KVA, 460V PRI, 460/266 V SEC, GENERAL ELECTRIC OUTDOOR TRANSFORMER

    • Manufacturer: GE

    Inventory id: 12139200000 | Rating: 175 | Primary voltage: 460 | Secondary voltage: 460 / 266 | Phase: 3 | Hertz: 60 | Taps above and below: N/A | Taps voltages: 481, 460, 431 | Impedance: 4.4 | Weight: 1,030 | ...

    Pittsburgh, PA
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    40 KVA, 460 V PRI, 460Y/266X V SEC, FEDERALPACIFIC, ISOLATION TRANSFORMER

    • Manufacturer: Federal Pacific

    Inventory id: 10251700000 | Rating: 40 | Primary voltage: 460 | Secondary voltage: 460 Y / 266 | Phase: 3 | Hertz: 60 | Impedance: 5.14 | Weight: 345 | Temperature rise: 150 | Load break switch: NO

    Pittsburgh, PA
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    20 KVA, 460 V PRI, 460Y/266 V SEC, GENERAL SIGNAL, ISOLATION TRANSFORMER

    • Manufacturer: GENERALSIGNAL

    Inventory id: 10228900000 | Rating: 20 | Primary voltage: 460 | Secondary voltage: 460 Y / 266 | Phase: 3 | Hertz: 60 | Impedance: 3.8 | Weight: 335 | Class: AA | Temperature rise: 150 | Depth: 15 | Width: 23 | ...

    Pittsburgh, PA
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    15 KVA, 460 V PRI, 460Y/266X V SEC, FEDERAL PACIFIC, ISOLATION TRANSFORMER

    • Manufacturer: Federal Pacific

    Inventory id: 10239000000 | Rating: 15 | Primary voltage: 460 | Secondary voltage: 460 Y / 266 | Phase: 3 | Hertz: 60 | Impedance: 5.39 | Class: AA | Temperature rise: 150 | Depth: 19 1/2 | Width: 17 | Height: 1...

    Pittsburgh, PA
  • Trusted Seller
    HAMMOND 154787

    HAMMOND 154787

    • Manufacturer: Hammond

    Kva: 2000 kVA | Primary voltage: 27600 volts | Transformer type: Power Transformer | Auto vs isolation: Isolation | Oil vs dry: Dry | Made in: CANADA | Frequency: 60hz

    $71,924 USD

    Get financing

    Est. $1,354/mo

    British Columbia, Canada
  • Trusted Seller
    2003 GENERAL ELECTRIC CXTC4000 S002640

    2003 GENERAL ELECTRIC CXTC4000 S002640

    • Manufacturer: GE
    • Phase type: Three-phase

    Second unit available: Sku: 135008 Kva: 4000 kVA | Primary voltage: 24940/14400 volts | Secondary voltage: 600 volts | Phase: 3-phase | Transformer type: Power Transformer | Auto vs isolation: Isolation | Oil vs ...

    $65,111 USD

    Get financing

    Est. $1,225/mo

    British Columbia, Canada
  • Trusted Seller
    2016 USED–LIKE NEW 2016 METALEC

    2016 USED–LIKE NEW 2016 METALEC 3 kVA x 2 Control Power Transfer Box 4160 pri. volts, 120/240 sec. volts – Transformers – 2 x 3 kVA, 4160 volts, 120 volts, Single-phase , Isolation

    • Manufacturer: METALEC
    • Phase type: Single-phase

    Kva: 2 x 3 kVA | Primary voltage: 4160 volts | Secondary voltage: 120 volts | Phase: Single-phase | Auto vs isolation: Isolation | Made in: CANADA

    $3,269 USD
    British Columbia, Canada
  • Trusted Seller
    2012 UEE 1500-US-034

    2012 UEE 1500-US-034

    • Manufacturer: UEE
    • Phase type: Three-phase

    Come with switchgear and fuses Kva: 500 kVA | Primary voltage: 4160 volts | Secondary voltage: 600/347 volts | Phase: 3-phase | Transformer type: Substation Transformer | Auto vs isolation: Isolation | Oil vs dry...

    $39,958 USD

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    Est. $752/mo

    British Columbia, Canada
  • Trusted Seller
    DELTA CITC0030

    DELTA CITC0030

    • Manufacturer: Delta
    • Phase type: Three-phase

    Kva: 30 kVA | Primary voltage: 480 volts | Secondary voltage: 120 volts | Phase: 3-phase | Transformer type: Power Transformer | Auto vs isolation: Isolation | Oil vs dry: Dry | Enclosure type: Nema 2 | Made in:...

    $581 USD
    British Columbia, Canada
  • Trusted Seller
    1988 FERRANTI-PACKARD 25

    1988 FERRANTI-PACKARD 25

    • Manufacturer: FERRANTI-PACKARD
    • Phase type: Three-phase

    Electrical Testing and Tap Changer Inspection PDF Oil Analysis PDF

    $290,602 USD

    Get financing

    Est. $5,469/mo

    British Columbia, Canada
  • Trusted Seller
    DELTA CETC0075S001534

    DELTA CETC0075S001534

    • Manufacturer: Delta
    • Phase type: Three-phase

    Kva: 75 kVA | Primary voltage: 600 volts | Secondary voltage: 208/120 volts | Phase: 3-phase | Transformer type: Pad Mounted Transformer | Auto vs isolation: Isolation | Oil vs dry: Dry | Enclosure type: Nema 3R

    $4,519 USD
    British Columbia, Canada
  • Trusted Seller
    2003 GENERAL ELECTRIC CXTC4000 S002641

    2003 GENERAL ELECTRIC CXTC4000 S002641

    • Manufacturer: GE
    • Phase type: Three-phase

    Second unit available: Sku: 135112 Kva: 4000 kVA | Primary voltage: 24940/14400 volts | Secondary voltage: 600 volts | Phase: 3-phase | Transformer type: Power Transformer | Auto vs isolation: Isolation | Oil vs ...

    $65,111 USD

    Get financing

    Est. $1,225/mo

    British Columbia, Canada
  • Trusted Seller
    BEAVER SC7HK/B

    BEAVER SC7HK/B

    • Manufacturer: BEAVER
    • Phase type: Single-phase

    Kva: 7.5 kVA | Primary voltage: 480 volts | Secondary voltage: 120/240 volts | Phase: Single-phase | Transformer type: Power Transformer | Auto vs isolation: Isolation | Oil vs dry: Dry | Enclosure type: Nema 2 ...

    $581 USD
    British Columbia, Canada
  • Trusted Seller
    1988 FERRANTI-PACKARD 25

    1988 FERRANTI-PACKARD 25

    • Manufacturer: FERRANTI-PACKARD
    • Phase type: Three-phase

    Oil Analysis PDF Kva: 41670 kVA | Primary voltage: 132000 volts | Secondary voltage: 13800 volts | Phase: 3-phase | Transformer type: Substation Transformer | Auto vs isolation: Isolation | Oil vs dry: Oil

    $871,805 USD
    British Columbia, Canada
2728293031

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.