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Used automatic in Shanghai, China

  • Trusted Seller
    Semi Automatic Inserting Machine For

    Semi Automatic Inserting Machine For EI Sheet Transformer

    • Manufacturer: LIANGUI

    Semi-automatic inserting machine for EI sheet of low frequency transformer Product parameter: Input: 220VAC~240VAC 50~60Hz Output: 60VAC 24VDC Features: ① It saves manpower and reduces the labor intensity of the ...

    Shanghai, China
  • Multi Functional Current Transformer Tester

    Multi Functional Current Transformer Tester Polarity CTPT accuracy testing system

      CTPT characteristic comprehensive tester is a fully automatic PT and CT characteristic testing instrument. The tests that the instrument can complete include: CT volt ampere characteristic test, Pt volt ampere ch...

      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.