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Used Power Transformers

  • Trusted Seller
    GENERAL ELECTRIC 1867 KVA TRANSFORMER

    GENERAL ELECTRIC 1867 KVA TRANSFORMER

    • Manufacturer: GE

    Wisconsin, USA
  • 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
  • Trusted Seller
    GENERAL ELECTRIC 1500 KVA TRANSFORMER

    GENERAL ELECTRIC 1500 KVA TRANSFORMER

    • Manufacturer: GE

    Wisconsin, USA
  • 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 480 volt, 50-60 Hz, 3 phase, serial# 367112-001.

    Cleveland, OH
  • Trusted Seller
    SCHRACK LP7331B1 TRANSFORMER ($125 OBO)

    SCHRACK LP7331B1 TRANSFORMER ($125 OBO)

    • Manufacturer: SCHRACK

    SCHRACK LP7331B1 TRANSFORMER 230 V AC 24 V DC 1,5 A 50-60 HERTZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instr...

    $125 USD
    Waukesha, WI
  • Trusted Seller
    LAPP-TEXTIMA CH-8335 HITTNAU TRANSFORMER ($50

    LAPP-TEXTIMA CH-8335 HITTNAU TRANSFORMER ($50 OBO)

    • Manufacturer: Lapp-Textima

    “Used, good condition” LAPP-TEXTIMA CH-8335 HITTNAU TRANSFORMER TYPE ET-ENGU 1 PH 2470 V 50/60 HZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. ...

    $50 USD
    Waukesha, WI
  • Trusted Seller
    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER

    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER ($85 OBO)

    • Manufacturer: ELTRA TRANSFORMATOREN

    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER 230 VAC 24 V ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions ...

    $85 USD
    Waukesha, WI
  • Trusted Seller
    Powerstat 9.8 Kva Variable Autotransformer

    Powerstat 9.8 Kva Variable Autotransformer - 1296d

    • Manufacturer: Powerstat

    Used, Made In The Usa Name: Variable Autotransformer | Arrival date: 10-02-2025 | Dimensions l x w x h (inches): 25 x 24 x 21 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $543 USD
    Euclid, OH
  • Trusted Seller
    CHUO ELECTRIC BKO-R8548 TRANSFORMER ($100

    CHUO ELECTRIC BKO-R8548 TRANSFORMER ($100 OBO)

    • Manufacturer: Chuo Electric

    “Used, good condition” CHUO ELECTRIC BKO-R8548 TRANSFORMER ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructio...

    $100 USD
    Waukesha, WI
  • Trusted Seller
    EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER

    EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER ($40 OBO)

    • Manufacturer: EGS

    “USED, EXCELLENT” EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER 50/60 HERTZ .180 KV 105 INSULATION CLASS TYPE EP3B ***Local deliveries available, simply message us before purchasing so we can properly adjust the lis...

    $40 USD
    Waukesha, WI
  • Trusted Seller
    ALLEN BRADLEY 1497-N8 SERIES A

    ALLEN BRADLEY 1497-N8 SERIES A TRANSFORMER ($50 OBO)

    • Manufacturer: Allen-Bradley

    “USED, EXCELLENT” ALLEN BRADLEY 1497-N8 SERIES A TRANSFORMER 250 VA 220/440 - 240/480VAC PRIMARY 50/60 HERTZ 100/120 VAC SECONDARY ***Local deliveries available, simply message us before purchasing so we can prop...

    $50 USD
    Waukesha, WI
  • Nunome NET 6930 DTP2 Dry-Type

    Nunome NET 6930 DTP2 Dry-Type Transformer 6.93k

    • Manufacturer: Nunome Electric Co.

    “Clean used item as seen in the images. Includes 30 day warranty. The tabs on the Fuji breakers have broken off as seen in image 4” Nunome NET 6930 DTP2 Dry-Type Transformer 6.93k 0-D53B-17501-GX This item is lis...

    $675 USD
    Baroda, MI
1617181920

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.