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Used controller in USA

  • SIEMENS,MT1500A,CONTROL TRANSFORMER 1.5KVA

    SIEMENS,MT1500A,CONTROL TRANSFORMER 1.5KVA

    • Manufacturer: Siemens

    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 ...

    $100 USD
    Galion, OH
  • SIEMENS,A1TRCQ0B112,INDUSTRIAL CONTROL TRANSFORMER PRI-230X460V SEC-115V

    SIEMENS,A1TRCQ0B112,INDUSTRIAL CONTROL TRANSFORMER PRI-230X460V SEC-115V NEW

    • Manufacturer: Siemens

    SIEMENS,A1TRCQ0B112,INDUSTRIAL CONTROL TRANSFORMER PRI-230X460V SEC-115V NEW 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 i...

    $240 USD
    Galion, OH
  • 3 kva Siemens MT300A control

    3 kva Siemens MT300A control power transformer primary 240x480 v secondary 120/110 v CPT05

    • Manufacturer: Siemens

    Stock # CPT05 Unused Siemens MT3000A control power transformer 3000 VA, 1 phase, 60 hz Primary voltage 240x480, 230x460x, 220x440 VAC Secondary voltage 120/115/110 VAC Dimension 8.67”x9”x7.07” 50 lbs, made in Mex...

    Canton, GA
  • Trusted Seller
    SIEMENS TRANSFORMER 4AP4405-5LB 45KVA

    SIEMENS TRANSFORMER 4AP4405-5LB 45KVA

    • Manufacturer: Siemens
    • Model: 4AP4405-5LB

    SIEMENS TRANSFORMER 4AP4405-5LB 45KVA SIEMENS TRANSFORMER4AP4405-5LB45KVA14-1/2" X 7" X 13"*PLEASE VIEW PICTURES CAREFULLY - SOLD AS IS*****OLD STOCK***PLEASE READ BEFORE BIDDING, MAKING AN OFFER, OR PURCHASING 1...

    $1,000 USD
    Coffeyville, KS

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.