33kV SINGLEPHASE POTENTIAL TRANSFORMERS
| 1. Name and address of Manufacturer | : | Twiclo Electrical Industries, Raipur |
| 2. Manufacturer’s type & Designation | : | Oil Filled, Vacuum Impregnated: VOD |
| 3. Nature of service | : | Outdoor * |
| 4. Type of Cooling | : | ON * |
| 5. System characteristics | : | |
| a. Rated system voltage | : | 33kV |
| b. Highest system voltage | : | 36 kV |
| c. Rated system frequency | : | 50 Hz |
| d. Nature of neutral earthing | : | Effective |
| 6. Rated voltage ratio | : | (33000/√3) / (110/√3)* |
| 7. Winding Connections | : | NA as single phase |
| 8. Rated Burden | : | As per spec VA * |
| 9. Class of Accuracy | : | As per spec * |
| 10. Polarity | : | Not applicable |
| 11. Rated voltage factor and time | : | 1.2 continuous; 1.5 / 30 sec * |
| 12. Limits of ratio and phase error | : | Within limits specified by IS |
| 13. Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary | : | Within limits specified by IS |
| 14. Secondary Core details | : | |
| a. Type | : | Outdoor, Glazed Porcelain to IS 5621. * |
| b. Electrical characteristics | : | To IS 5621 * |
| c. Total creepage distance | : | 900 mm minimum. * |
| 15. One-minute power frequency withstand test on primary winding | : | 70 kV induced; 3 kV applied. * |
| 16. One-minute power frequency withstand test on secondary winding | : | 3 kV. * |
| 17. High voltage impulse withstand test on primary windings | : | 170 kV. * |
| 18. Oil | ||
| a. Specification | : | To IS 335 * |
| b. Quantity for First Filling | : | Approx. 30 Litres. |
| 19. Total weight of P.T. with oil | : | Approx. 90 Kgs. |
| 20. Equipment conforms to specification | : | IS 3156 |
| 21. Outline dimensional drawing with mounting details | : | As per our drawing |
Note: Only items marked * are guaranteed. All others are indicative and subject to change.
