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Used Hammond Isolation Transformers

  • Trusted Seller
    45 KVA HAMMOND POWER SOLUTIONS

    45 KVA HAMMOND POWER SOLUTIONS "NMK045KB" 3-PHASE DRY-TYPE TRANSFORMER

    • Manufacturer: Hammond
    • Model: NMK045KB

    45-KVA HAMMOND POWER SOLUTIONS 3-PHASE DRY-TYPE TRANSFORMER Part No NMK045KB, Type K EQUIPPED WITH: GE Heavy-Duty Safety Switch Aluminum Winding Ventilated Construction NEMA 3R Enclosure Rating CATALOG SPECIFICAT...

    $1,450 USD
    Cincinnati, OH
  • Trusted Seller
    45 KVA HAMMOND POWER SOLUTIONS

    45 KVA HAMMOND POWER SOLUTIONS "NMK045KB" 3-PHASE DRY-TYPE TRANSFORMER w/480 VOLT PRIMARY - 208Y/120V SECONDARY

    • Manufacturer: Hammond
    • Model: NMK045KB

    45-KVA HAMMOND POWER SOLUTIONS 3-PHASE DRY-TYPE TRANSFORMER Part No NMK045KB, Type K EQUIPPED WITH: GE Heavy-Duty Safety Switch Aluminum Winding Ventilated Construction NEMA 3R Enclosure Rating CATALOG SPECIFICAT...

    $1,450 USD
    Cincinnati, OH
  • Trusted Seller
    45 KVA HAMMOND POWER SOLUTIONS

    45 KVA HAMMOND POWER SOLUTIONS "NMKL045KB" 3-PHASE DRY-TYPE TRANSFORMER w/480 VOLT PRIMARY - 208Y/120V SECONDARY

    • Manufacturer: Hammond
    • Model: NMK045KB

    45-KVA HAMMOND POWER SOLUTIONS 3-PHASE DRY-TYPE TRANSFORMER Part No NMK045KB, Type K EQUIPPED WITH: GE Heavy-Duty Safety Switch Aluminum Winding Ventilated Construction NEMA 3R Enclosure Rating CATALOG SPECIFICAT...

    $1,450 USD
    Cincinnati, OH
  • Trusted Seller
    45 KVA HAMMOND POWER SOLUTIONS

    45 KVA HAMMOND POWER SOLUTIONS "NMK045KB" 3-PHASE DRY-TYPE TRANSFORMER w/480 VOLT PRIMARY - 208Y/120V SECONDARY

    • Manufacturer: Hammond
    • Model: NMK045KB

    45-KVA HAMMOND POWER SOLUTIONS 3-PHASE DRY-TYPE TRANSFORMER Part No NMK045KB, Type K EQUIPPED WITH: GE Heavy-Duty Safety Switch Aluminum Winding Ventilated Construction NEMA 3R Enclosure Rating CATALOG SPECIFICAT...

    $1,450 USD
    Cincinnati, OH
  • Trusted Seller
    45 KVA HAMMOND POWER SOLUTIONS

    45 KVA HAMMOND POWER SOLUTIONS "NMK045KB" 3-PHASE DRY-TYPE TRANSFORMER w/480 VOLT PRIMARY - 208Y/120V SECONDARY

    • Manufacturer: Hammond
    • Model: NMK045KB

    45-KVA HAMMOND POWER SOLUTIONS 3-PHASE DRY-TYPE TRANSFORMER Part No NMK045KB, Type K EQUIPPED WITH: GE Heavy-Duty Safety Switch Aluminum Winding Ventilated Construction NEMA 3R Enclosure Rating CATALOG SPECIFICAT...

    $1,450 USD
    Cincinnati, OH
  • 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
  • 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
  • Trusted Seller
    HAMMOND HJ9J

    HAMMOND HJ9J

    • Manufacturer: Hammond

    HAMMOND HJ9J Transformer Brand: Hammond Catalog No.: HJ9J Type: Control / Isolation Transformer Primary Voltage: 600 V Secondary Voltage: 120 V Power Rating: 250 VA (Volt-Amps) Frequency: 60 Hz Phase: Sin...

    $36 USD
    Delson, Canada
  • Trusted Seller
    HAMMOND 212980

    HAMMOND 212980

    • Manufacturer: Hammond
    • Phase type: Three-phase

    Kva: 600 kVA | Primary voltage: 480 volts | Secondary voltage: 250 volts | Phase: 3-phase | Auto vs isolation: Isolation | Oil vs dry: Dry | Enclosure type: Nema 3R | Made in: CANADA | Enclosure: 3R

    $9,377 USD

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    Est. $184/mo

    British Columbia, Canada
  • 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

    $71,136 USD

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    Est. $1,339/mo

    British Columbia, Canada
  • Trusted Seller
    HAMMOND 225515

    HAMMOND 225515

    • Manufacturer: Hammond
    • Phase type: Three-phase

    Kva: 225 kVA | Primary voltage: 4160 volts | Secondary voltage: 600 volts | Phase: 3-phase | Auto vs isolation: Isolation | Oil vs dry: Dry | Enclosure type: Nema 3R | Made in: CANADA

    $4,540 USD
    British Columbia, Canada
  • Trusted Seller
    HAMMOND MANUFACTURING 128220

    HAMMOND MANUFACTURING 128220

    • Manufacturer: Hammond
    • Phase type: Three-phase

    Kva: 1250 kVA | Primary voltage: 13800 volts | Secondary voltage: 600/347 volts | Phase: 3-phase | Transformer type: Substation Transformer | Auto vs isolation: Isolation | Oil vs dry: Oil

    $86,225 USD

    Get financing

    Est. $1,623/mo

    British Columbia, Canada
123

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.