HIGH CURRENT BUSHINGs

ALUMINIUM / COPPER

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