33KV Voltage Transformer

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.