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CURRENT TRANSFORMERS FOR TRANSMISSION LINES
Current transformer with rated voltage from 115 kV to 400 kV, according to CFE standard VE100-13. Basic insulation level from 550 kV to 1425 kV. SANDIAN brand.
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| Characteristics | CT 115 kV | CT 138 kV | CT 161 kV | CT 230 kV | CT 400 kV | |
|---|---|---|---|---|---|---|
| Rated voltage (kV) | 115 | 138 | 161 | 230 | 400 | |
| Max. Design voltage (kV) | 123 | 145 | 170 | 245 | 420 | |
| Power frequency Withstand voltage (kV effective) | Internal | 230 | 275 | 325 | 460 | 630 |
| External | 230 | 275 | 325 | 460 | 630 | |
| Lightning impulse withstand voltage (kV cresta) | Internal | 550 | 650 | 750 | 1050 | 1425 |
| External | 550 | 650 | 750 | 1050 | 1425 | |
| Frequency (Hz) | 60 | 60 | 60 | 60 | 60 | |
| Winding 1: measurement class / burden measurement (VA) | 0.2S / 30 | 0.2S / 30 | 0.2S /30 | 0.2S / 30 | 0.2S / 30 | |
| Winding 2-3-4: protection class / burden protection (VA) | 10P20 / 100 | 10P20 / 100 | 10P20 / 100 | 10P20 / 100 | 10P20 / 100 | |
| FA (A) | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | |
| Thermal short-circuit current | 40 | 40 | 40 ó 50 | 40 ó 63 | 40, 50 ó 63 | |
| Voltage ratio (A) Type 1 | 300/400/500X600/800/1000X1200/1600/2000:5 | 300/400/500X600/800/1000X1200/1600/2000:5 | 600/800/1000X1200/1600/2000:5 | 600/800/1000X1200/1600/2000:5 | 800/1000X1600/2000:5 | |
| Voltage ratio (A) Type 2 | ´---- | ´---- | 1500/1600X3000/2300:5 | 1500/1600X3000/3200 | 1500/1600X3000/3200 | |
| Creepage distance (mm) | 31 | 25 | 31 | 31 | 31 | |
| Insulation | Corrosive sulfur and PCB-free oil | Corrosive sulfur and PCB-free oil | Corrosive sulfur and PCB-free oil | Corrosive sulfur and PCB-free oil | Corrosive sulfur and PCB-free oil |
