Current Transformer (CT) includes Outdoor and Indoor type. Indoor CTs are epoxy resin casting insulation, which is widely used for measuring current, electric energy and relaying protection in the electrical system with the rated voltage up to 12kV, 24 kV, 40.5 kV rated frequency 50Hz or 60Hz.
Rated insulation level: 12/42/75kV.
Rated secondary current: 5A or 1A.
Power frequency withstand voltage: 12kV.
Rated frequency: 50/60Hz.
Ambient temperature: -5°C ~+40°C.
Altitude: ≤1000m.
Standard: IEC 60044-1.
| Rated current ratio (A) | Accuracy classes
combination |
Rated output (VA)
COSФ=0.8 |
FS | ALF | 1s short-time thermal current (kA) | Rated dynamic current (kA) | ||
| Measuring | Protection | |||||||
| 0.2(s) | 0.5 | 10P | ||||||
| 10-200/5 | 0.2(s)/0.2(s)
0.2(s)/0.5 0.2(s)/10P 0.5/10P 0.2s/0.5/10P 0.2/0.5/10P |
10
15 |
15 | 15 | 5
(10) |
10
15 20 |
150I1n | 375I1n |
| 300/5 | 31.5 | 80 | ||||||
| 400/5 | 31.5 | 80 | ||||||
| 500/5 | 40 | 100 | ||||||
| 600/5 | 50 | 125 | ||||||
| 800/5 | 20 | 63 | 125 | |||||
| 1000/5 | 80 | 160 | ||||||
| 1200-1500/5 | 80 | 160 | ||||||
| 1500-2000/5 | 100 | 160 | ||||||
| 2000-3150/5 | 130 | 160 | ||||||
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