The Current Transformer ( C.T. ), is a type of “instrument transformer” that is designed to produce an alternating current in its secondary winding which is proportional to the current being measured in its primary.

Generally current transformers and ammeters are used together as a matched pair in which the design of the current transformer is such as to provide a maximum secondary current corresponding to a full-scale deflection on the ammeter. In most current transformers an approximate inverse turns ratio exists between the two currents in the primary and secondary windings. This is why calibration of the CT is generally for a specific type of ammeter

Service Features

• Current Ratio: 200/5Amps
• Rated Voltage: The Current Transformer will have to be suitable for continuous working at system voltage up to 660Volts and frequency 50Hz.
• Burden: 5VA at 0.8 pf (lag).
• Class of Accuracy: 0.5.
• Inner Diameter: 45mm, suitable for mounting through 40x10mm² flat bar.
• Instrument Security Factor: < 5
• current rating: 5KA for 1 second