Wound Primary Protective Current Transformers


  • Ratio Range : 50/5 or 1A to 200/5 or 1A
  • Standard Accuracy Class : 5P, 10P, 15P, Special – PS and XPS

KWP Series are a range of Protective Current Transformers. These CTs are used to activate the protective relay in case of a fault current and isolate a part of or the full system from the main supply. Apart from the standard ranges, we can design and manufacture for your specific requirements. Please feel free to get in touch with us if you need something that’s not listed here.

  • Can be manufactured to IS-16227, IEC-61869 or C-57.
  • Wide range of transformer ratios available.
  • Standard accuracy class and Special accuracy class for balanced schemes are available.
  • Available as PVC tape insulated, Varnished fiber glass tape insulated or Resin cast.
  • System Voltage: 0.66KV/0.72KV
  • Rated Secondary Current: 5A or 1A
  • Dielectric withstand Voltage: 3KV for 1 minute
  • Operating Frequency: 50Hz/60Hz
  • Overload withstand current: 1.2 x rated current continuously
  • Class of Insulation A – For Tape Wound B – For Resin Cas
  • Standard Ambient Conditions -5°C to +45°C
  • Altitude: Up to 1000mtrs above mean sea level
  • Primary Current: 1A to 200A
  • Secondary Current: 1A, 5A or as per customer requirement
  • Accuracy Limit factor (ALF): 5, 10, 15, 20 & 30
  • Output (Burden): 1 VA to 30 VA