Technical
Data Specification
Manufacturer : UNINDO
Design Standart : SPLN/IEC '76/NFC Under Licence Alstom
Transformer Type : Oil immersed, Hermetically Sealed tottaly Oil filled
Nominal Rating : 500 KVA
Number of phase : 3
Nominal frequency : 50 Hz
Nominal primary voltage : 20 KV
Nominal secondary voltage : 400 V
Vector group according to IEC '76 : Dyn5
Voltage insulation primary windings : 24 KV
Impulse Voltage : 125 KV
Applied voltage test : 50 KV
Temperature insulation class : A
Ambient temperature : 40 °C
Temperature rise : - Windings : 65 °C
- Oil : 60 °C
Type of Cooling : ONAN
Type of oil : Mineral oil according to IEC 296 Class 1
Esso Univolt - 80
Description of primary tapping : ±2,5 %, ±5 %
Impedance voltage : 4 %
Noise level : 56 dB
Iron losses : 1,100 Watt
Cooper losses : 5,500 Watt
Efficiency :
Load |
4/4 |
3/4 |
2/4 |
¼ |
pf.
0,8 |
98,38 |
98,62 |
98,78 |
98,58 |
pf.
1,0 |
98,70 |
98,89 |
98,86 |
98,86 |
Voltage drop at nominal load : - pf. 0,8 : 3,22 %
- pf. 1,0 : 1,17 %
Weight - Total : 1.550 kg
- Oil : 350 kg
Painting Colour : Light Grey RAL 7032
Accessories : Name Plate, rating plate, off load tap changer, filling plug,
Earthing terminal, lifting lugs, Draining Valve,
Bidirectional rollers, H.V. Porcelains bushing.
Optional Accessories : DMCR Protection transformer.
Elastimold Bushing
50 mm2