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Used wind in Shanghai, China

  • current transformer toroidal CNC wire

    current transformer toroidal CNC wire winding machine

    • Manufacturer: Trihope

    TR-300B Current Transformer CND Toroidal Wire Winding Machine 1. Main technical parameters

    $10,900 USD

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    Est. $214/mo

    Shanghai, China
  • current transformer toroidal cnc winding

    current transformer toroidal cnc winding machine

      current transformer toroidal CNC wire winding machine is on the basis of introducing of foreign technology, and according to the domestic transformer industry new workmanship requirements, researching and develop...

      Shanghai, China
    • Transformer (Transformer)

      Transformer (Transformer)

        ※ Product Overview Dry Isolation Transformer , with moisture resistance, easy maintenance and other advantages, can deeply reach the load center, suitable for power transmission and distribution sites such as sub...

        Shanghai, China
      • S13 oil-filled transformer

        S13 oil-filled transformer

          S13 oil-filled transformer has the following advantages: Low loss: The oil-immersed transformer with three-dimensional winding core has no core seams, which reduces the magnetic resistance. The direction of magne...

          Shanghai, China
        • S11 oil-filled transformer

          S11 oil-filled transformer

            S11-M series oil-filled transformer has the advantages of low loss, low noise and high efficiency. It can saves energy and reduce the pollution. Compared with ordinary oil-immersed transformers, the fully sealed ...

            Shanghai, China

          Overview

          Current transformers (CTs) convert high alternating currents into a scaled secondary current for meters, relays and protection systems. Available as window, wound or bar types, CTs vary by ratio, accuracy class and saturation behavior. Proper selection focuses on rated primary current, burden, insulation, knee-point for protection use, and condition when buying used for substations, switchgear, or industrial panels.

          FAQ

          What should I check when buying a used CT?

          Verify the nameplate ratio and accuracy class, inspect for physical damage or oil leaks, request recent ratio and insulation test reports, and confirm the CT type (wound/window/bar) and its knee-point if used for protection.

          How should a CT be prepared and shipped safely?

          Drain and seal oil-filled CTs if required, protect bushings and cores, short and ground the secondary terminals, secure the unit to prevent shock, and use a carrier experienced with electrical equipment plus insurance.

          What routine maintenance and tests are essential for CTs?

          Perform visual inspections, insulation resistance tests, ratio and polarity checks, check for oil contamination on liquid-filled units, and schedule periodic accuracy and dielectric tests per manufacturer guidelines.