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Used Staco Current Transformer (Ct)

  • Trusted Seller
    Staco 3PN1010 Variable Autotransformer

    Staco 3PN1010 Variable Autotransformer

    • Manufacturer: Staco

    The 3PN series are connected for output voltage increase with a clockwise rotation, and the dials are graduated from 0 to 100% of the voltage setting. This Matheson 3PN variable transformer operates from 120V lin...

    $165 USD
    Montréal-Est, Canada
  • Trusted Seller
    Staco 3PN1010B Variable Autotransformer

    Staco 3PN1010B Variable Autotransformer

    • Manufacturer: Staco
    • Model: 3PN1010B

    The 3PN series are connected for output voltage increase with a clockwise rotation, and the dials are graduated from 0 to 100% of the voltage setting. This Matheson 3PN variable transformer operates from 120V lin...

    $165 USD
    Montréal-Est, Canada
  • QTY. 1. INSTRUMENT TRANSFORMERS INC.

    QTY. 1. INSTRUMENT TRANSFORMERS INC.

      QTY. 1. INSTRUMENT TRANSFORMERS INC. CURRENT TRANSFORMER CAT. 21-101 RF 2.0 ACC CLASS 0.6 B0.1 C10 50-400 HZ 600V INS. CLASS 10 KV BIL.

      Texas City, TX

    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.