| Bushing type | Nominal voltage(kV) | Rated current(A) |
| Low voltage | 1/3 | 250 |
| 630 | ||
| 1250 | ||
| 2000 | ||
| 3150 | ||
| 4500 | ||
| 6300 | ||
| Middle voltage | 12/24/36 | 250 |
| 630 | ||
| High voltage | 12 | 1250 |
| 2000 | ||
| 3150 | ||
| 4500 | ||
| 24 | 1250 | |
| 2000 | ||
| 3150 | ||
| 4500 | ||
| 36 | 1250 | |
| 2000 | ||
| 3150 | ||
| 4500 | ||
| 52 | 250 | |
| 630 | ||
| 1250 | ||
| 2000 | ||
| 3150 | ||
| 4500 | ||
| 1250 | ||
| 2000 | ||
| 3150 |
Product Description
Functional Positioning for Power Systems Engineering
The High Voltage Porcelain Bushing by NJREC is engineered primarily for use by transformer designers, electrical engineers, and procurement specialists seeking a reliable power transformer bushing solution. It is suited for deployment in medium- to high-voltage transformers where stable electrical insulation and current conduction capacity are critical. As a trusted transformer bushing manufacturer, NJREC delivers components designed to meet stringent operational and safety requirements, facilitating seamless integration into new builds and retrofit projects. This product appeals to users needing customizable terminal configurations and a range of environmental resistance options, ensuring compatibility with diverse transformer designs across industrial and utility sectors.
Technical Specifications and Compliance Details
This bushing features nominal voltage support from 1 kV to 52 kV and current ratings up to 12500 A, offering significant operational capacity for high-demand electrical networks. Constructed with premium porcelain insulation, it provides superior dielectric strength and environmental resilience against humidity and pollution. Compliance with IEC 60137, historical DIN transformer bushing, and current EN standards validates its engineering integrity and adherence to international quality benchmarks. Multiple termination types—including screwed conductor stems and flag terminals—are available at the air end, with matching oil-end finishes. The variety of surface finishes such as tin plating and galvanising ensures compatibility with corrosive and harsh installation environments.
Application Contexts in Power Transmission and Distribution
NJREC's porcelain bushing finds extensive use in insulating medium to high voltage levels in power and distribution transformers, critical in substations and industrial power plants. Its robust design is effective for retrofitting applications where replacements must meet or exceed existing performance standards. The product’s adaptability allows it to function reliably in coastal, industrial, and rural environments, managing electrical stress while maintaining insulation integrity. The product supports engineering efforts in customizing creepage distances and termination options to match specific transformer designs, facilitating operational efficiency and safer electrical system management across grid infrastructure.
Product Advantages
Design and Structural Excellence for System Integration
The bushing’s design incorporates modular termination options that align with varied transformer connection standards, including transformer bushingDIN and ANSI configurations. This adaptability enhances compatibility with both legacy and contemporary transformer systems. Porcelain insulation material is carefully engineered to optimize dielectric performance while resisting environmental degradation. Metallic components finished with tin plating, galvanising, or copper plating augment corrosion resistance, extending service life. The broad voltage and current rating range offers scalable integration possibilities for multiple transformer classes, backing the product’s versatility as a premium solution from established transformer bushing suppliers.
Enhanced Operational Performance and Reliability
Performance-wise, the product maintains dielectric stability under thermal and mechanical stresses typical in power transformer operations, ensuring uninterrupted current flow and insulation integrity. Its construction simplifies installation and maintenance procedures, reducing downtime and operational costs. The inclusion of multiple creepage distances supports tailored solutions for various pollution and humidity conditions, directly impacting system longevity and safety compliance. End users gain assurance from NJREC’s documented adherence to IEC and EN standards, which underpin system reliability, durability, and reduced risk of electrical faults in critical high voltage equipment.
Use Scenarios
High Voltage Insulation in Power Utility Networks
In power utility substations, where high voltage transformers are integral to grid distribution, the porcelain bushing functions as a vital insulating and conducting interface. The product’s compliance with IEC 60137 and EN bushing standards ensures regulatory conformity and operational safety. It addresses the challenges of electrical stress and environmental exposure within outdoor installations, including weather and pollution effects. The bushing seamlessly integrates with transformer windings and oil-filled compartments, facilitating secure electrical passage with minimal leakage paths. This robust insulation contributes to stable power delivery, essential for maintaining grid reliability.
Retrofitting Industrial and Distribution Transformers
In industrial settings or maintenance of distribution transformers, this solution assists in upgrading or replacing existing bushings while maintaining design continuity. The availability of both DIN bushing and ANSI compatible termination options streamlines retrofit processes, ensuring engineering compatibility with diverse transformer brands and models. The porcelain insulating body withstands environmental contaminants common in industrial atmospheres, including dust and humidity. By fitting into existing transformer insulation systems with precision, this bushing enhances operational safety and prolongs equipment service life, supporting effective asset management and reduced operational risk in industrial power infrastructure.
What voltage and current ratings do your transformer bushings support?
Our transformer bushing products are rated for nominal voltages from 1 kV up to 52 kV, with current capacities reaching 12500 A depending on the model. This range allows us to support various power and distribution transformer requirements reliably.
Can NJREC customize the termination types and surface finishes of porcelain bushings?
Yes, we offer flexibility in termination styles including screwed conductor stems and flag terminals at the air end, with matching or machined hole terminations at the oil end. Surface finishes such as tin plating, galvanising, and copper plating can be tailored to meet specific environmental and installation needs.
How do you ensure compliance with international standards for high voltage bushings?
We manufacture our porcelain bushings following the IEC 60137 standard, combined with historical DIN and current EN specifications. This guarantees each high voltage bushing meets strict electrical insulation, mechanical strength, and safety benchmarks required in diverse transformer applications.
Are your porcelain bushings suitable for retrofit installations in existing transformers?
Absolutely, our transformer bushing products are designed for both new installations and retrofit projects. With various creepage distances, termination options, and surface finishes, we provide tailored solutions that address environmental challenges and improve transformer lifespan during upgrades or replacements.
