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 : 50 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 : 250 Watt

Cooper losses : 1,450 Watt

Efficiency :

Load	4/4	3/4	2/4	¼
pf. 0,8	97,43	97,77	98,02	97,91
pf. 1,0	97,87	98,25	98,41	98,20

Voltage drop at nominal load : - pf. 0,8 : 3,60 %

- pf. 1,0 : 1,82 %

Weight - Total : 400 kg

- Oil : 100 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 : Thermometer without contact