TECHNICAL SPECIFICATIONS
63 KVA three phase Oil Cooled Aluminium wound Distribution Transformer
– Quantity 1 No.
1
Reference standard
IS 2026
2
Type of Transformer
Oil Cooled
3
Normal continuous rating (KVA)
63 KVA
4
Voltage Ratio
11KV/433 V
5
Current ratio
3.306 A / 84 A
6
Rated frequency
50 Hz
7
Number of phases
3
8
Type of cooling
ONAN (Oil Natural Air Natural)
9
Vector group
Dyn 11
10
Connections (HV/LV)
Delta/Star (Neutral brought out on LV side
11
Winding material
Aluminium
12
Insulation of winding
Double paper covered or enamel class H
13
Current density for Al conductor
1.6 A/sq mm (5% tolerance allowed)
14
Star rating
3 star (minimum) as per BEE guideline
15
Percentage impedance
4.5%
16
Noise level at rated voltage and
frequency
50 db
17
Class of insulation
Class A
18
Lamination
CRGO (M-4 grade)
19
Permissible temperature rise over
ambient
(1)Of top oil measured by
thermometer
(2)Of winding measured by resistance
35 degree
20
Terminal arrangement (HV/LV)
Cable box/cable box
21
Type of installation
Out door
40 degree
22
Fittings and
accessories as per
relevant Indian
Standards
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Rating and diagram plate
Top filter valve
Bottom filter cum drain valve
Lifting lugs (2 Nos minimum) for whole transformer
Pulling legs 4 Nos
HV bushings 3 Nos
LV Bushings 4 Nos
Terminial connectors on HV/LV bushings
Earthing terminals 2 Nos
Thermometer pocket with cap 1 No
Air release plug on tank cover
Oil conservator tank with drain plug, filling holes and
cap
Oil level indicator
Drain-cum Filter valve with plug
Silica-gel breather
Air release plug, Explosion vent etc.
Suitable Base channel