Optimal Solutions To Demanding Requirements

Unique current transformer designs for applications including instrument control & monitoring, switch mode power supply control and feedback for equipment protection. Materials are chosen to optimize performance and reduce cost.

Example Types of Current Sense Transformers:

  • Encapsulated – Potted
  • Current Transformers (CT’s)
  • Switch Mode & Switching
  • Current Monitoring
  • Encapsulated
  • High-Frequency Sense
  • Toroidal

Recent Work

  • Large Coil-Only Current Transformer
    Used to measure current for utility applications, this large coil consists of 3-ph windings of 0.060x0.160 & 0.075x0.280 rectangular MW18C wire wound on a custom paper coil form. Class H insulation. Hytex layer insulation and Mylar outerwrap. Custom Model 217076.
  • High Current Output Multi-Tap Step-Down Power Transformer
    This Multi-Tap Step-Down Power Transformer is 240V, 60Hz fundamental input with a total of 9 incremental taps yielding 2.0-4.0Vac @ 5kVA (1250-2500A). Low loss 29M6 Electrical Grade Steel core with 8AWG heavy copper windings (MW-36C) Class H (180C) insulation. 90lbs.
  • Current Source Transformer
    High Power 250:1 Turns Ratio Open Style, 4 Slot Chassis Mount, 1600A Output
  • Current Transformer (CT)
    1000:1 Turns Ratio Tape Wound Toroid, 220A Primary Current

Transformers That Perform

State-of-the-art materials, expert design capability and world-class manufacturing

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Current Sense Transformer Capabilities at Electronic Craftsmen

  • Burden load – may be provided by us or customer supplied
  • Accuracy as low as 0.1%
  • Power: From mW to 50kVA @ 60Hz or up to 200kVA @ 20kHz (typical)
  • Working Voltage up to 15kV (depending on frequency); multiple stages possible for higher outputs
  • Frequency: 25Hz to 500kHz (typical)
  • Temperature Class to 220C (155C / Class F typical)
  • Weight: 0.06 oz / 1g to 550 lbs / 250kg
  • Multiple taps as required
  • Dielectric Strength (hipot) to 30kVac or 20kVdc
  • Parts can be vacuum varnished or molded with a variety of hard or soft encapsulant materials with thermal conductivity.
  • Wire sizes from 1-45 AWG or Copper Foil to 0.050in thick (in multiple layers for higher current); Litz wire for higher frequency
  • Regulation to specification
  • Manufactured using all known state-of-the-art magnetic core materials, including but not limited to electrical grade steel laminations, ferrites & powdered iron, nickel-iron alloy, iron amorphous metal strip-wound cores, nanocrystalline cores and small toroids.
  • Antifungal and non-nutrient coatings available
  • Corrosion resistant coatings & platings available
  • Standard or custom terminations & leads
  • Mounting Configurations: pcb-mount (horizontal or vertical), custom or standard brackets or stacked configurations
  • Designed to meet CSA & UL (safety) or MIL PRF 27 (aerospace / military) requirements upon request
  • MIL PRF 27 Grade 5 & 6 encapsulation available