TRANSFORMER CT
TRANSFORMER CT
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. Current transformers reduce high voltage currents to a much lower value and provide a convenient way of safely monitoring the actual electrical current flowing in an AC transmission line using a standard ammeter. The principal of operation of a basic current transformer is slightly different from that of an ordinary voltage transformer.
Technical Specification
Technical Specification
Technical Specification | Bushing CTs |
CTs | |
Reference Standard | IEC, IS or ANSI |
System Voltage (Um) | Up to 765 kV |
Insulation Level | 1.1/3 kVp |
Rated Primary Current (Ipn) | Up to 5000 A |
Rated Secondary Current (Isn) | 1A, 1.5A, 2A or 5A |
Rated Short Time Current (Ith) | 50 kA |
Rated Peak Current (Idyn) | 2.5 x Ith |
Burden | As per client requirement |
Metering Accuracy Class | 0.2s, 0.2, 0.5s, 0.5, 1.0, 3.0 or 5.0 |
Protection Accuracy Class | 5P, 10P, 15P or CLASS X |
Insulation Class | B or higher |
Frequency | 50 or 60 Hz |