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Used Power Transformers in China

  • 5.28kw Total Power Core Winding

    5.28kw Total Power Core Winding Machine with Low Noise and Good Self Locking of Transformer Machine

    • Manufacturer: En-source

    5.28Kw total power core winding machine with low noise and good self locking of transformer machine Company Profile Our company has been specializing in the development and production of transformer specific equi...

    Zhejiang, China
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    Power frequency test transformer

      Now we have two types of test transformer: YD-Relative humidity of HV component(Non condensing) Voltage 5kV ～ 500kV/Capacity 5kVA ～ 1000kVA YDT-Series modular type(epoxy barrel) test transformer Voltage 10kV ～ 15...

      Shanghai, China
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      Vertical Semi-Automatic Winding Machine for power transformer coil

        Vertical winding machine is mainly used for winding large power transformer coil, which is an ideal equipment for high voltage, ultra-high voltage, continuous and pie coil. According to the type, the machine can ...

        Shanghai, China
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        Power transformer moveable automatic trolley core tilting core stacking line

          Core Stacking Line is the automatic auxiliary equipment for core lamination process, Consist of Roller Table, Core Stacking table, Trolley, and Tilting table. This Stacking Line is to replace the original laminat...

          Shanghai, China
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          IGBT Power Source Transformer Factory

            • 30-300kW rated energy. • 0-600V output voltage. • 20Hz-200Hz frequency adjust range.

            Shanghai, China
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            Simple Transformer POWER Tape Machine

              WDP-01 POWER TAPE core machine Scope of application: Suitable for TAPE high-frequency transformers winding, low-frequency transformers winding, inductors winding and other coils winding. Hot Tags: simple transfor...

              Zhongshan, China
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            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.