Resin Cast Type LT Current Transformers
This specification covers Resin Cast type LT Current Transformers confirming to IS 16227 with class 0.5S / 0.5/ 1.0 accuracy, for use in conjunction with -/5A energy meters. CTs will be design for indoor use to install in metering box / panel.
| Manufacturer name & address | Secure Meters Limited |
|---|---|
| Class of Accuracy | 0.5s |
| Type of CT | Resin Cast Ring type |
| Rated Voltage & frequency | 415 Volts (Line), 50Hz ± 5% |
| Maximum system voltage | 660V |
| Current transformer ratio (Rated Primary Current) | 100A, 125A, 150A, 200A, 300A, 400A, 500A, 600A, 800A, 1000A, 1200A, 1500A, 1600A, 2000A |
| Rated secondary current | 5A |
| Supply Frequency | 50Hz ± 5% |
| Room Temperature | 27°C |
| Supply System Variation | As per Standard |
| Highest System Voltage | 600V |
| ISF | <=5 |
| Rated output Burden | As per enclosed drawing |
| Rated continuous thermal current temperature rise over ambient | 1.2 times rated primary current within maximum temp rise limit of 50°C |
| One minute withstand of power frequency voltage between primary & secondary | 3 KV |
| Insulation level voltage | 3 KV |
| Material of Core | Low loss core |
| Short time current rating | 5KA for 1 second |
| Material of Conductor | Super enameled copper wire |
| Material of Insulation | Class of Insulation "E" for indoor application |
| Secondary Termination | Stud type terminal |
| Polarity marking | Indelibly marked / coded for primary & secondary |
| Outline drawing / leaflet | Enclosed |