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Used Sin Marca Current Transformer (Ct)

  • Unbranded MAK62/30 Current Transformer 4D

    Unbranded MAK62/30 Current Transformer 4D

    • Manufacturer: Sin Marca

    Palmetto Automation Inc. of Duncan SC specializes in buying, selling, and repairing obsolete Used, Refurbished, and New industrial electronic equipment. Most of our used equipment goes through basic power bench t...

    $44 USD
    Duncan, SC
  • Trusted Seller
    Control transformer 40A model BPI

    Control transformer 40A model BPI 08520

    • Manufacturer: Sin Marca

    Control transformer 40A model BPI 08520 Technical characteristics Visible identification: Primary inputs: 400 V 408 V 416 V 424 V 433 V Physical characteristics EI laminated core Exposed winding with insulation O...

    Hermosillo, Mexico

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.