Opticat current transformer

MOCT-P Optical Current Transformer System  ABB

Application :

• The Magneto-Optic Current Transformer for Protection (MOCT-P) is a passive optical current transducer which uses light to accurately measure current on high voltage systems.
• The MOCT-P system is suitable for outdoor application and has a continuous current rating up to 3150 A with an accuracy limit factor of 40 x.
• It meets the protection class accuracy 5TPE, according to IEC 60044-8. The electronic unit 2100-PI uses ABB’s patented dual-direction approach to make the output signal insensitive to shock and vibration.
• The optical design enables accurate reproduction of fully offset fault currents with decaying d.c. component without saturation or other source of distortion.

Benefits of the MOCT-P Optical Current Transducer System :

• The MOCT-P system can satisfy current sensing needs for protective relaying in a wide variety of applications. Following is a list of key benefits:
  
  

       • No requirement for oil or gas insulation system,

        environmentally safe.

• Shunt-like reproduction of fully offset fault current with decaying d.c. component with high accuracy and no saturation or other sources of distortion.
  
  

       • Improved safety with no mechanism for failure or open secondary

          

• Significantly smaller size and lighter weight than oil- or Sf₆  insulated equipment.

      

• Total isolation from surges for microprocessor-based meters and relays.       

       • No magnetic core ferroresonace or saturation limits.