1 |
Design Standard |
IEC 60076 |
2 |
Type |
Three Phase Wound Core/Stack Core |
3 |
Installation |
Outdoor, Tropical, High Rainfall & Humidity |
4 |
Winding Material |
High Conductivity Copper |
5 |
Core Type and Material |
CRGO Silicon Steel |
6 |
Nominal Voltage |
HT = 11000 V t0 33000 V & LT = 415 V |
7 |
Rated Frequency |
50 Hz |
8 |
BIL (Basic Insulation Level) |
HT Winding = 75 KV, LT Winding = 2.5 KV |
9 |
Power Frequency Withstand Voltage |
HT Winding = 28 KV, LT Winding = 2.5 KV |
10 |
Vector Group |
DYn 11 |
11 |
Cooling Method |
ONAN |
12 |
Maximum Temperature Rise at Full Load & at Rated tap position:
|
- Shall not exceed 65° C (Resistance Method)
- Shall not exceed 60° C (Thermometer Method)
|
13 |
Tap Changer |
Off Load type; +1 x 2.5%, 0, -3 x 2.5% of rated voltage |
14 |
Bushing:
- Type & Material
- Connectors
- Quantity
- Mounting Position
|
- Outdoor type, Porcelain as per IEC 60137
- Bolted ring type
- HT = 3, LT = 4
- HT – On the tank cover, LT – On the side of the tank
|
15 |
Tank:
- Design
- Ground Provision
- Lifting Facilities
- Conservator
- Breather
- Painting
|
- Bolted type complete with cover and gasket
- with bolted ring type connector
- Provided with Facilities for lifting the core and coil
- Provided
- Silica Gel Breather
- Light Gray, ANSI Color # 70
|
16 |
Insulating Oil |
New, Unused, Mineral oil as per IEC 60296 & BS 148 |
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