Distribution Transformers
Standard Technical Specs
TYPE TEST :
Type tests are special tests which are oponal and are carried out at addional applicable fees, to be born by the customer. These tests are organized at independent test labs such as CPRI & ERDA. They include 1. Lightening Impulse test. 2 . Short Circuit test 3. Temperature rise test.
Standard Distribution Transformer Specifications
| Installation | Indoor or Outdoor as per customer requirement. |
|---|---|
| No of Phase | 3 Phase. |
| Frequency | 50 Hz |
| Voltage Ratio |
11/0.415 kV 22/0.415 kV 33/0.415 kV |
| Insulation Class | Class ‘A’ / Class ‘B’ |
| Vector Group | Dyn11 or as desired by customer |
| Winding Material | Copper |
| Tappings (Off Load Type) |
Generally +5% to -10% in steps of 2.5% on HT winding. However, it can be offered as per customer requirement. |
| Termination | As per customer requirement. |
| Cooling | ONAN (Oil Natural Air Natural) |
| Cooling Arrangement | Corrugated tank or with Pressed Steel Radiators as per customer requirement. |
| Colour | As a standard, we offer paint shade as Seimens Grey (RAL 7032), however colour paint shade can be changed as per requirement of customer. |
STANDARD FITTINGS :
- Rang & Diagram Plate .
- Drain cum boom filter valve.
- Earthing Terminals.
- Cooling radiators.
- Lifting Lugs.
- Uni / Bi – direconal rollers.
- Thermometer pocket.
- Explosion vent with the diaphragm.
- Oil level indicator.
- Oil conservator with drain plug.
- Air release hole with plug.
- Top filter valve.
OPTIONAL FITTINGS AT EXTRA COST :
- Bucholz relay with alarm & trip contact.
- Marshaling box.
- Oil Temperature indicator with alarm & trip contact.
- On Load Tap Changer OLTC.
- Winding temperature indicator with alarm & trip contact.
- RTCC ( Remote Tap Changer control ) Cubicle.
- Magnetic oil level gauge with alarm & trip contact.
- AVR ( Automatic Voltage regulator).
- Pressure release valve with alarm & trip contact.
- Cable box on HT & LT Side.
Note :
- The transformers are designed to follow the losses as specified in the trailing table as per IS 1180. All transformers are designed and manufactured in accordance to the same.
- Hermetically sealed transformers with Nitrogen filling are also manufactured & supplied.
- Drawings & details can be submitted against finalization of order.