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Used MBS Current Transformer (Ct)

  • MBS WSK 30 Current Transformer

    MBS WSK 30 Current Transformer (BIN735)

    • Manufacturer: MBS

    MBS WSK 30 Current Transformer 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 g...

    $32 USD
    Duncan, SC
  • Trusted Seller
    MBS, CTB 31.35, 250/5A, 5VA,

    MBS, CTB 31.35, 250/5A, 5VA, 50/60Hz, Current Transformer

    • Manufacturer: MBS

    “Good condition, may show signs of storage.” Dimensions: Bus bar 1 in mm: 30x10 Bus bar 2 in mm: 2x20x5 Round conductor in mm: 26 Width in mm: 61 Height in mm: 81 Depth in mm: 53 Technical Data: Therm. nominal co...

    $35 USD
    Latham, MO
  • MBS ASK 41.4 / 300

    MBS ASK 41.4 / 300 Plug-on current transformer 5A 50 60Hz No. 00/CU23513

    • Manufacturer: MBS

    MBS ASK 41.4 / 300 plug-on current transformer 5A 50 - 60Hz No. 00/CU23513, used, good condition, 100% functional, scope of delivery according to photos

    $7 USD
    Remscheid, Germany
  • MBS ASK 31.3 Plug-on current

    MBS ASK 31.3 Plug-on current transformer Primary current in A 100 /

    • Manufacturer: MBS

    MBS ASK 31.3 Plug-on current transformer Primary current in A: 100 / Secondary current in A: 1 / Apparent power (VA): 2.5 / Accuracy class: 1 , used, minor signs of wear, 100% functional, scope of delivery as per...

    $7 USD
    Remscheid, Germany

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.