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Used single in Shanghai, China

  • Transformer (Transformer)

    Transformer (Transformer)

      ※ Product Overview Dry type Isolation transformer It has the advantages of moisture-proof and easy maintenance, and can penetrate deep into the load Center, can be used in the subway, high-rise buildings, airport...

      Shanghai, China
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      Static Transfer Switch SANUPS S11A S11A302B011

        No. of input phases/wires: Single-phase 2-wire | Rated input voltage[v]: 100 | Input voltage range: ±15% of rated voltage | Rated input frequency[hz]: 50/60 | No. of output phases/wires: Single-phase 2-wire | Ra...

        Shanghai, China
      • High Pressure Combined Transformer

        High Pressure Combined Transformer

        • Manufacturer: Combi

        Shanghai Metal Corporation is a leading High Pressure Combined Transformer manufacturer and supplier. JLS type three-phase oil-immersed outdoor high-voltage power metering box (hereinafter referred to as metering...

        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.