Current Transformers

• Efficient Toroidal Coil Corporation
• Pune

Current Transformers

Efficient Toroidal Coil Corporation, manufacturer of linear motion potentiometers, servo potentiometers, and toroidal transformers, has launched high precision ETC brand Current Transformers (CT) for metering and protection applications. Like any other transformer the current transformer has a primary winding a magnetic core, and a secondary winding. The alternating current flowing in the primary produces a magnetic field in the core, which then induces a current in the secondary winding circuit. A primary objective of the current transformer design is to ensure that the primary and secondary circuits are effectively coupled, so that the secondary current bears an accurate relationship to the primary current. The accuracy of a CT is directly related to number of factor like burden, rating factor; load; external electromagnetic field; temperature; physical configuration and the selected tap, for multiple ratios CT. Typical burden ratings for ETC CTs are from 0.2 VA to 60 VA.