Oil Impregnated Paper (OIP)
Oil Impregnated Paper (OIP) is used for bushings that utilize plain craft paper, with the condenser core saturated with transformer-grade mineral oil. OIP bushings usually have upper air-side and lower oil-side porcelain insulators.
Hitachi Energy offers several different product lines of OIP condenser bushings for AC and DC transformers and reactors. Details of the designs vary with voltage and current ratings.
Why is Hitachi Energy your preferred partner?
Speak to our expert: Superior technical consulting starting with the pre-sales process.
Engineered for your needs: Customize your bushing with our online product configurator “COMPAS.” We offer the world’s most comprehensive range covering all technologies in AC and DC, up to the highest ratings.
Documentation at your fingertips: Instantly download our comprehensive documentation, e.g., outline drawings, 3D models, type test summaries, declarations, manuals, and catalogs.
Responsiveness drives productivity: Fast customer quotations and technical consulting.
Fast and reliable deliveries: Assured short delivery time enabled by our unique footprint with production sites on each continent.
Minimize unplanned transformer downtime: Minimize the risk of bushing failure with our TXpert™ bushing monitoring.
Fast response: Benefit from our 24/7 helpdesk. Rapid local on-site support through the world’s largest transformer service organization present in more than 30 countries. Connect remotely to our service experts to save cost and time.
Seamless upgrades & replacements: Matching solutions for all bushing brands executed by our certified global service personnel with vast field experience.
Optimize inventories: Reduce your bushing inventories by up to 35% using bushing diagnostic test data to prioritize only those bushings at risk.
Transparent and predictable cost: Tailored bushing and diagnostic services with transparent costs facilitating reliable budget planning and optimized maintenance spending.
Resin Impregnated Paper (RIP)
Hitachi Energy offers the most comprehensive and complete range of RIP bushings for AC and DC transformers, reactors, and AC switchgear and breakers in the market.
Resin Impregnated Paper (RIP) is used for dry bushings in which the main insulation consists of a core wound from crepe paper, which is then impregnated with a curable resin. The outer insulation is a composite insulator with silicone sheds or a porcelain insulator.
Our bushings are compliant with many international and regional product standards.
Why is Hitachi Energy your preferred partner?
Speak to our expert: Superior technical consulting starting with the pre-sales process.
Engineered for your needs: Customize your bushing with our online product configurator COMPAS. We offer the world’s most comprehensive range covering all technologies in AC and DC, up to the highest ratings.
Documentation at your fingertips: Instantly download our comprehensive documentation, e.g., outline drawings, 3D models, type test summaries, declarations, manuals, and catalogs
Responsiveness drives productivity: Fast customer quotations and technical consulting.
Fast and reliable deliveries: Assured short delivery time enabled by our unique footprint with production sites on each continent,
Minimize unplanned transformer downtime: Minimize the risk of bushing failure with our TXpert™ bushing monitoring.
Fast response: Benefit from our 24/7 helpdesk. Rapid local on-site support through the world’s largest transformer service organization present in more than 30 countries. Connect remotely to our service experts to save cost and time.
Seamless upgrades & replacements: Our certified global service personnel with vast field experience execute matching solutions for all bushing brands.
Optimize inventories: Reduce your bushing inventories by up to 35% using bushing diagnostic test data to prioritize only those at-risk bushings.
Transparent and predictable cost: Tailored bushing and diagnostic services with transparent costs facilitating reliable budget planning and optimized maintenance spending.
Resin Impregnated Synthetic (RIS) bushings
Resin Impregnated Synthetics (RIS) is the latest technology within our industry and is very similar to Resin Impregnated Paper (RIP) technology with one exception. Instead of using conventional paper as spacer between the capacitive layers, the bushing's core is wound with synthetic fabrics. Both RIP and RIS bushings use epoxy resin as the main insulation material. The outdoor insulation for oil-air transformer applications, is made from silicone rubber material, extruded or molded directly onto the RIS condenser core. RIS bushings do not absorb water (no hygroscopic material like paper is used) and are, therefore, easier to store. At the same time, they share the same excellent fire-resistant, explosion-proof characteristics, and other advantages of traditional dry or RIP bushings.
Our RIS bushings are available for AC transformers and reactors.
Why is Hitachi Energy your preferred partner?
Complete range and outstanding performance under the most demanding conditions
- Many years of proven reliability in all continents
State-of-the-art production facilities and 100 years of transformer components manufacturing experience
Flexible design allows for adaptation to different customer needs and transformer requirements
Completely dry bushing, i.e., no oil spills, no explosion risk
- No maintenance or constant monitoring is necessary
- Transport and storage is possible in all positions
- Partial discharge-free up to double service voltage
Non-condenser Core Bushings
Hitachi Energy offers a complete range of non-condenser core bushings for reliably connecting distribution and power transformers. Our bushings are suitable for outdoor and indoor applications and are available in several designs that enable a high customization freedom to fit almost all transformer requirements.
Hitachi Energy non-condenser core bushings for power transformers where the design is in conformance with IEC 60137:
- From 24 up to 52 kV and 6300 A
- Completely oil-, paper-, and porcelain-free dry bushings
- Suitable for extreme operating conditions down to -60°C
- Tested and certified for ester oils and other alternative transformer fluids
In addition, Hitachi Energy offers non-condenser core bushings for distribution transformers that are designed in conformance with regional standards (DIN, EN, BS):
- Porcelain bushings up to 3.6 kV and 6500 A
- Porcelain bushings up to 52 kV and 8000 A
- Epoxy resin bushings up to 36 kV and 2500 A
TXpert™ Bushing Monitoring
Real-time monitoring enabled by CoreTec™ 5, the TXpert™ Hub monitoring, and diagnostics device
TXpert™ Bushing monitoring solution provides real time bushing monitoring for power transformers according to the two main technologies: voltage reference and sum of current. It combines the CoreTec™ 5, TXpert™ Hub with our TXpert™ Ready bushing sensors to provide a turnkey solution for digital bushing monitoring and enable smarter decisions based on data-driven intelligence.
It can monitor 1, 3, or 6 bushing configurations and give you an early warning of incipient faults developing in a bushing. It is available for installation in new transformers and retrofit applications for most brands or types.
- Continuous monitoring of bushing health parameters
- Connectivity to CoreTec™ 5, the and the TXpert™ Hub
- All bushing types (oil-filled or dry) with a tap connector
- Bushing health readings:
- Dissipation factor (Tanδ)
- Capacitance
