OUTDOOR
OUTDOOR
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 | OUTDOOR CT-PT Unit | |
CTs | PTs | |
Reference Standard | IEC, IS or ANSI | IEC, IS or ANSI |
System Voltage (Um) | Up to 36 kV | Up to 36 kV |
Insulation Level | 70/170 kVp | 70/170 kVp |
Rated Primary Current (Ipn) | Up to 5000 A | – |
Rated Primary Voltage | – | Up to 33000/√3 V |
Rated Secondary Current (Isn) | 5A or 1A | – |
Rated Secondary Voltage | – | 110/√3 V |
Rated Short Time Current (Ith) | 13.1 kA | – |
Rated Peak Current (Idyn) | 2.5 x Ith | – |
Burden | As per client requirement | As per client requirement |
Metering Accuracy Class | 0.2s, 0.2, 0.5s, 0.5, 1.0 or 3.0 | 0.2, 0.5, 1.0 or 3.0 |
Protection Accuracy Class | 5P, 10P, 15P or CLASS X | 3P or 6P |
Voltage Factor | – | 1.2 continuous and 1.9 for 8 hours |
Insulation Class | B or higher | B or higher |
Frequency | 50 or 60 Hz | 50 or 60 Hz |