FOR GENERATOR STEP-UP TRANSFORMERS
Insulation : Oil-impregnated paper/ Oil filled – Hermetically Sealed/Oil Communicating
Application : Transformer – Outdoor
Type : Oil to Air
Rated Voltage : 24 kV 52 kV**
Rated Current : upto 25000 A
Standard : IEC 60137:2017/IEEE C.57.19.00/01
Conductor : Aluminum / Copper
** Special / Higher voltage ratings also available upon request
Through customer-focused innovation, our avant-garde High Current Bushings have been engineered to provide a fine performance in Generation station transformer applications across India and globally. Available in voltage classes from 24 kV to 52 kV with current ratings from 4000 A to 25000 A, our bushings are resilient to endure aggressive applications.
The range is fully type tested at ILAC-accredited test laboratories, and possess a high level of customization potential based on the customer s needs for dimensions and interchangeability. Drawings for specific models are available upon request
- Rated Voltage: 24 kV ~ 52 kV*
- Rated Current: 4000 A ~ 25000 A
- Standard – IEC-60137:2017 OR IEEE C.57.19.00/01
- Types: Oil filled/Communicating/OIP Condenser
- Conductor: Aluminium/Copper
- Insulation: Oil-impregnated paper/ Oil filled Hermetically sealed/ Oil Communicating
- Application: Transformer Outdoor
- Type: Oil to Air
- Rated Voltage 24 kV- 52 kV
- Rated Current up to 20000 A
- Standard: IEC 60137: 2017/ IEEE C57.19.00/01
All our standard models are type tested at ILAC/NABL Accredited laboratories as per IEC-60137/IEEE C57.19.00/01. For any fresh type test requests, we request you to approach us on an individual basis and we can work out a techno-commercial solution suitable for you.
- Exact interchangeability with global reputed makes
- Robust solid rod construction with oil end termination integrally milled on conductor
- No joint on the conductor below the top cap level
- SS Helicoil inserts on oil end termination holes to enable direct bolting of transformer lead for Aluminium design bushings
- Manufacturing and field experience of more than 4000 Bushings upto 20kA
- Finely graded Capacitive insulation for optimum electrical field distribution
- Partial discharge free and low dissipation factor
- Excellent thermal performance
- High seismic and short circuit load withstand capacity
- Self-cleaning alternate shed profile according to IEC
- Viton material O-rings for oil sealing
- Provision of test tap for insulation health monitoring
- Highly customizable design in terms of mounting and terminal connection
- Provision for accommodating special CT pocket length requirements
- Suitable for Bus-duct operation
- Shortest lead time industry-wide
- High strength porcelain as per IEC 60815
- The Bushings comply with IEC 60137 standard s performance requirements for application in GSU power transformers, station transformer, unit auxiliary transformers & others
- The main component of Bushing for OIP Insulated Bushings is the Active part and is manufactured using insulating kraft paper wound around a solid conductor. OIP condenser core is standard from 36kV onwards but is available for a lower voltage upon request
- During paper winding, aluminium foils are embedded in the paper, co-axially at pre-calculated locations to optimise the radial and axial electrical field along the bushing
- After winding, the paper core is dried under vacuum at elevated temperatures and subsequently impregnated with high-quality vacuum dried and degassed Insulating mineral oil
- For Oil Insulated Bushings, the oil serves as major insulation
- The bushing is assembled in a controlled environment and filled under vacuum with vacuum dried and degassed Insulating Mineral oil
- After oil filling, each Bushing is subjected to oil overpressure test for verification of joint sealing
- The appropriate cushion is incorporated post pressure test on top of oil level to allow for expansion, and the space is purged with high purity Nitrogen before sealing
- All bushings are tested in accordance with IEC 60137
