Energy » Transformers » Power Transformers

Search By Manufacturer

Search By Country

Building Filters

1699

Used Power Transformers

  • Trusted Seller
    RUBSAMEN 0321 CONTROL TRANSFORMER ($40

    RUBSAMEN 0321 CONTROL TRANSFORMER ($40 OBO)

    • Manufacturer: Rübsamen Herr

    “GOOD, EXCELLENT CONDITION” 0321 CONTROL TRANSFORMER 50 VA 400 V 230 V 50/60HZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your...

    $40 USD
    Waukesha, WI
  • Trusted Seller
    PACIFIC 712556J TRANSFORMER ($30 OBO)

    PACIFIC 712556J TRANSFORMER ($30 OBO)

    • Manufacturer: Pacific

    “Used, fair condition” PACIFIC 712556J TRANSFORMER ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions (addr...

    $30 USD
    Waukesha, WI
  • Trusted Seller
    ACME CAT. NO. T-1-81059 Transformer

    ACME CAT. NO. T-1-81059 Transformer - 0.75 kVA - ($75 OBO)

    • Manufacturer: Acme

    “Used, great working condition.” CAT. NO. T-1-81059 Single Phase Transformer 0.75 kVA Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide ...

    $75 USD
    Waukesha, WI
  • Trusted Seller
    PACIFIC 712553 D TRANSFORMER ($30

    PACIFIC 712553 D TRANSFORMER ($30 OBO)

    • Manufacturer: Pacific

    “Used, fair condition” PACIFIC 712553 D TRANSFORMER ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions (add...

    $30 USD
    Waukesha, WI
  • Michael Riedel DRUL 8000 UL-CSA

    Michael Riedel DRUL 8000 UL-CSA Transformer 3-Phase

    • Manufacturer: Michael Riedel

    “Used item as seen in the images. This is listed for local pickup only. We will ship freight at the expense of the purchaser. Please message for a freight quote.” Michael Riedel DRUL 8000 UL-CSA Transformer 3-P...

    $720 USD
    Baroda, MI
  • Trusted Seller
    HAKKO MFG CO. TRANSFORMER ($65

    HAKKO MFG CO. TRANSFORMER ($65 OBO)

    • Manufacturer: Hakko

    “USED, EXCELLENT” HAKKO MFG CO. TRANSFORMER PRIMARY SIDE: 25V, 80V, 220V, 200V SECONDARY SIDE: 50VA, 10VA, 25VA, 4.5V ***Local deliveries available, simply message us before purchasing so we can properly adjust t...

    $65 USD
    Waukesha, WI
  • Trusted Seller
    3 PH 13.8 KVA M14128

    3 PH 13.8 KVA M14128 Marelco Power Systems Transformer PT No. M-14128

    • Manufacturer: Marelco

    Marelco Power Systems Transformer PT No. M-14128 3 PH 13.8 KVA Will ship via UPS Shipping weight is 90 Lbs INV No. P-57

    $400 USD
    Henderson, KY
  • Trusted Seller
    POWERTRAN 36B #0672325

    POWERTRAN 36B #0672325

    • Manufacturer: POWERTRAN

    Kva: 30 | High voltage: 480v | Low voltage: 208/120v | Hz: 60 | Phase: 3ph | Weight: 315lbs

    Toledo, OH
  • Emerson ASCO 7000 Series Power

    Emerson ASCO 7000 Series Power Transfer Switch, 400A, 220V, 3ph NEW

    • Manufacturer: Asco

    The Emerson ASCO 7000 Series Power Transfer Switch is a new automatic switch designed for industrial use. With a rated amperage of 400A and a voltage of 220V, 3-phase, it is suitable for transferring power in a v...

    $7,500 USD

    Get financing

    Est. $147/mo

    Graytown, OH
  • Trusted Seller
    GENERAL ELECTRIC 1867 KVA TRANSFORMER

    GENERAL ELECTRIC 1867 KVA TRANSFORMER

    • Manufacturer: GE
    • Model: 1500 KVA

    Wisconsin, USA
  • Trusted Seller
    POWERTRAN 36B #0777025

    POWERTRAN 36B #0777025

    • Manufacturer: POWERTRAN

    Kva: 30 | Primary voltage: 480v | Secondary voltage: 208/120v | Hz: 60 | Phase: 3ph

    Toledo, OH
  • Trusted Seller
    Emerson Network Power ASCO 7000

    Emerson Network Power ASCO 7000 Series Automatic Transfer Switch

    • Manufacturer: Asco

    Emerson Network Power ASCO 7000 Series Automatic Transfer Switch Used Emerson Network Power ASCO 7000 Series Power Transfer Switch, rated for 260 amps at 460 volt, 50-60 Hz, 3 phase, serial# 566223-001.

    Cleveland, OH
  • Trusted Seller
    ACME TA-2-81212 CONTROL TRANSFORMER ($50

    ACME TA-2-81212 CONTROL TRANSFORMER ($50 OBO)

    • Manufacturer: Acme

    “USED, EXCELLENT” ACME TA-2-81212 CONTROL TRANSFORMER 150 VAC 50/60 HERTZ SINGLE PHASE PRI: 240 X 480 ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for y...

    $50 USD
    Waukesha, WI
  • Trusted Seller
    ABB CCT50-480/120 TRANSFORMER ($60 OBO)

    ABB CCT50-480/120 TRANSFORMER ($60 OBO)

    • Manufacturer: ABB

    “USED, EXCELLENT” ABB CCT50-480/120 TRANSFORMER 50 VA 460-480/120 VAC 50/60 HERTZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide y...

    $60 USD
    Waukesha, WI
  • Trusted Seller
    KASUGA S8E2088 TRANSFORMER ($85 OBO)

    KASUGA S8E2088 TRANSFORMER ($85 OBO)

    • Manufacturer: Kasuga

    “USED, EXCELLENT” KASUGA S8E2088 TRANSFORMER 300 VA 50/60 HZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instruct...

    $85 USD
    Waukesha, WI
3435363738

Overview

Power transformers transfer electrical energy between voltage levels for utilities, substations, and large industrial plants. These heavy, high-capacity units come in oil-filled or dry-type designs, with cooling classes (ONAN, ONAF, etc.), on-load tap changers, bushings and protection gear. Buyers must match voltage class, impedance, capacity (kVA/MVA), and cooling to system needs, and plan for foundation, handling, transport and commissioning.

FAQ

What specifications should I check when buying a used power transformer?

Confirm voltage ratios, kVA/MVA rating, impedance, cooling type, phase configuration, on-load tap changer condition, bushing types and insulation class, and recent test reports (DGA, insulation resistance, turns ratio).

How do I verify a used transformer's condition before purchase?

Request factory and maintenance records, Dissolved Gas Analysis (DGA), insulation resistance, power factor tests, sweep-frequency response (SFRA) and a visual inspection report for leaks, rust and bushing integrity.

What are the key shipping considerations for heavy power transformers?

Plan for specialized heavy-haul transport, load lifting equipment, route permits, weight/axle limits, skidding or cradling, draining oil if required by regulations, and coordination with local authorities for oversized loads.

What site preparations are needed before delivery and installation?

Prepare a level, rated foundation or skid with proper anchoring, ensure crane access and pad capacity, verify cable entry, grounding, oil containment for liquid-filled units, and arrange for qualified rigging and electrical commissioning crews.

What ongoing maintenance keeps a power transformer reliable?

Perform regular DGA, insulation resistance and oil quality tests, thermographic inspections, tap changer maintenance, bushing checks, cooling system inspections and timely repairs. Follow manufacturer intervals and keep detailed service records.