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Used computing in USA

  • Trusted Seller
    Acme Transformer – 75 kVA

    Acme Transformer – 75 kVA 3-Phase General Purpose Transforme

    • Manufacturer: Acme
    • Phase type: Three-phase

    “““"Call for photos and specs number: 786/277/7843 Service, cleaned and tested. Large inventory of compressors, dryers, chillers, filters, conveyors and forklifts.” MD MACHINERY CENTER HIGH QUALITY, GOOD PRICING,...

    $1,580 USD
    Miami, FL
  • Trusted Seller
    K-Tec WKE-95 Current Transformer Kit

    K-Tec WKE-95 Current Transformer Kit WKE Series New Surplus

    • Manufacturer: K-Tec

    K-Tec WKE-95 Current Transformer Kit WKE Series New Surplus CE Marked Included Components Part No: 314181 (Qty 1) Part No: GFR101-2 (Qty 1) Part No: 40121-071-02 (Qty 1) Part No: M-8764 (Qty 1) Part No: 1492-EAJ3...

    $852 USD
    Albuquerque, NM
  • Emerson Sola MCR 63-23-175-8, Constant

    Emerson Sola MCR 63-23-175-8, Constant Voltage Transformer, 750VA,

    • Manufacturer: Emerson

    Emerson Sola MCR 63-23-175-8, Constant Voltage Transformer, 750VA, MCR Mini / Micro Computer Regulator Constant Voltage Transformer 750 VA MCR Hardwire Regulator Hard Wired Series Power Protection Asset In Stock...

    Watertown, CT
  • Trusted Seller
    BEMAG 225 kVA Dry Type

    BEMAG 225 kVA Dry Type Isolation Transformer UC3225P480K13

    • Manufacturer: BEMAG

    OVERVIEW BEMAG Dry Type Isolation Transformer - Model UC3225P480K13, Standard BSN130411-05A-1, 225 kVA capacity, manufactured in Canada. Professional-grade three-phase isolation transformer featuring 480V primar...

    Ohio, USA
  • NANA CURRENT TRANSFORMER 100A-4V NNC-20CAW

    NANA CURRENT TRANSFORMER 100A-4V NNC-20CAW

    • Manufacturer: Fanuc

    HELLO AND THANK YOU FOR YOUR INTEREST IN THIS PRODUCT. THIS PART CAME FROM AN AGIE AGIECUT 100 D CNC EDM T HAT WE DISMANTLED.

    $60 USD
    Los Angeles, CA
  • Marcus M0250D Transformer

    Marcus M0250D Transformer

    • Manufacturer: Marcus

    Van Aliso Enterprises Inc is in the business of representing quality used/New Goods. We are a company that is dedicated to representing what we sell accurately and keeping our customers happy with the purchases t...

    $150 USD
    Santa Paula, CA

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.