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Used controller in USA

  • Square D,9070 EO-3,Industrial Control Transformer

    Square D,9070 EO-3,Industrial Control Transformer

    • Manufacturer: Square D

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $32 USD
    Galion, OH
  • SQUARE D,9070T50D1,CONTROL TRANSFORMER 0.05KVA

    SQUARE D,9070T50D1,CONTROL TRANSFORMER 0.05KVA

    • Manufacturer: Square D

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $15 USD
    Galion, OH
  • Square D,9070T5200D1,Industrial Control Transformer

    Square D,9070T5200D1,Industrial Control Transformer

    • Manufacturer: Square D

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $20 USD
    Galion, OH
  • SQUARE D,9070K75D1,INDUSTRIAL CONTROL TRANSFORMER NOS

    SQUARE D,9070K75D1,INDUSTRIAL CONTROL TRANSFORMER NOS

    • Manufacturer: Square D

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $45 USD
    Galion, OH
  • Square D,9070T50D1SF41,Control Transformer 0.05 kVA

    Square D,9070T50D1SF41,Control Transformer 0.05 kVA

    • Manufacturer: Square D

    Used and in good condition. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictures to ma...

    $65 USD
    Galion, OH
  • Square D,9070TF500D1,Control Transformer 50/60Hz 0.5/0.3kVA

    Square D,9070TF500D1,Control Transformer 50/60Hz 0.5/0.3kVA

    • Manufacturer: Square D

    Used and in good condition. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictures to ma...

    $65 USD
    Galion, OH
  • SQUARE D,9070T500D43,TRANSFORMER CONTROL 500VA 400/440/460-230

    SQUARE D,9070T500D43,TRANSFORMER CONTROL 500VA 400/440/460-230

    • Manufacturer: Square D

    Used in good condition. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictures to make s...

    $240 USD
    Galion, OH
  • Trusted Seller
    SQUARE D 9070TF50D1 CONTROL TRANSFORMER

    SQUARE D 9070TF50D1 CONTROL TRANSFORMER ($40 OBO)

    • Manufacturer: Square D

    SQUARE D 9070TF50D1 600V 30A TRANSFORMER CONTROL ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions (addres...

    $40 USD
    Waukesha, WI
  • Trusted Seller
    SQUARE D 9070T150D13 CONTROL TRANSFORMER

    SQUARE D 9070T150D13 CONTROL TRANSFORMER ($45 OBO)

    • Manufacturer: Square D

    “USED, EXCELLENT” SQUARE D 9070T150D13 CONTROL TRANSFORMER 150VA 24V 50-60 HZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your ...

    $45 USD
    Waukesha, WI
  • Trusted Seller
    SQUARE D 9070TF350D1 CONTROL TRANSFORMER

    SQUARE D 9070TF350D1 CONTROL TRANSFORMER ($130 OBO)

    • Manufacturer: Square D

    “USED, EXCELLENT” SQUARE D 9070TF350D1 CONTROL TRANSFORMER 1 PHASE 30 AMP 350 VA PRI 240/480V SEC 120V ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for ...

    $130 USD
    Waukesha, WI
  • Trusted Seller
    SQUARE D 9070-K50D2F14 INDUSTRIAL CONTROL

    SQUARE D 9070-K50D2F14 INDUSTRIAL CONTROL TRANSFORMER ($35 OBO)

    • Manufacturer: Square D

    “USED, EXCELLENT” SQUARE D 9070-K50D2F14 INDUSTRIAL CONTROL TRANSFORMER 50 VA 240/480 VAC 50/60 HZ 24 V SECONDARY ***Local deliveries available, simply message us before purchasing so we can properly adjust the l...

    $35 USD
    Waukesha, WI
  • SQUARE D 9070EL2D9 INDUSTRIAL CONTROL

    SQUARE D 9070EL2D9 INDUSTRIAL CONTROL TRANSFORMER. 1-E9

    • Manufacturer: Square D

    Items are spares/engineering demo hookups that were pulled from an industrial working environment. We repair all types of industrial automation including AC Servo Drives, Servo Motors, Operator Interface Panels, ...

    $86 USD
    Duncan, SC
  • Square D 9070TF50D23 Control Transformer

    Square D 9070TF50D23 Control Transformer 0.05 kVA Quick-Connect Term Mod. 4E-3

    • Manufacturer: Square D

    Square D 9070TF50D23 Control Transformer 0.50 KVA PRI 120/240 VAC 24 VAC SEC. OEM spares from a brewery/ bottling plant maintenance room's canceled expansion project tool crib. We repair all types of industri...

    $70 USD
    Duncan, SC
  • Square D 9070TF5D1 240V/480V Control

    Square D 9070TF5D1 240V/480V Control Transformer TF75D1 (9.3.3)

    • Manufacturer: Square D

    Square D 9070TF5D1 240V/480V Control Transformer New open Box*** Each*** Palmetto Automation Inc. of Duncan SC specializes in buying, selling, and repairing obsolete Used, Refurbished, and New industrial electron...

    $53 USD
    Duncan, SC
  • Square D,9070 EO-2,Industrial Control Transformer

    Square D,9070 EO-2,Industrial Control Transformer

    • Manufacturer: Square D

    What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

    $28 USD
    Galion, OH
12

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.