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Used test in Michigan, USA

  • Trusted Seller
    HAMMOND POWER SOLUTIONS NMK015KD 15

    HAMMOND POWER SOLUTIONS NMK015KD 15 kVA Transformer USED

    • Manufacturer: Hammond
    • Model: NMK015KD

    Dry Type Transformer 15 kVA 480 High Voltage 240 Low Voltage 3 Phase 60 Hz Type K Tested Good Expedited shipping services are available upon request. All taxes due are the responsibility of purchaser. V...

    $895 USD
    Holly, MI
  • MICAFIL CGI 30 kV, 73D57098

    MICAFIL CGI 30 kV, 73D57098 Insulator Electrical Transformer Bushing, ABB

    • Manufacturer: ABB

    “This unit may be new. The 9th image shows that it was mounted before. Not positive if these mounting marks are from testing or not. Very clean. Please see images.” MICAFIL CGI 30 kV, 73D57098 Insulator Elect...

    $1,350 USD
    Baroda, MI
  • Mitsubishi BK0-NC6982H04, 53 KVA Transformer

    Mitsubishi BK0-NC6982H04, 53 KVA Transformer - USED

    • Manufacturer: Mitsubishi

    USED Unable to test. Item does not have a nameplate. Refer to pictures. Mitsubishi BK0-NC6982H04, 53 KVA Transformer Item is guaranteed to not be DOA for replacement or refund within 30 days of receiving. Item is...

    $900 USD
    Kawkawlin, MI
  • Dongan 73-6215SH Transformer, 15KVA, 3PH,

    Dongan 73-6215SH Transformer, 15KVA, 3PH, 480VAC Primary, 240VAC Secondary.

    • Manufacturer: Dongan

    NEW Item has been opened and tested. Dongan 73-6215SH Transformer, 15KVA, 3PH, 60Hz, 480VAC Primary, 240VAC Secondary. Item is guaranteed to not be DOA for replacement or refund within 30 days of receiving. Item ...

    $1,400 USD
    Kawkawlin, MI
  • Osborne 77376C578, 22 Kva, H.V-

    Osborne 77376C578, 22 Kva, H.V- 200-220-380-400V, L.V- 220V.C.T Transformer

    • Manufacturer: Osborne Transformers

    USED Item has been tested Osborne 77376C578, 22 Kva, H.V- 200-220-380-400V, L.V- 220V.C.T Transformer Phase-1, HZ-50/60, Sec. Amps- 100, Item is guaranteed to not be DOA for replacement or refund within 30 days o...

    $532 USD
    Kawkawlin, MI

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.