Hebei Anmei Electrical Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of transformer neutral bushing in China, also supports customized service. If you're going to buy high quality transformer neutral bushing made in China, welcome to get quotation from our factory.
The Transformer Neutral Bushing is a specialized electrical component that serves as the critical interface between a power transformer's neutral point and the external grounding system. The evolution of transformer bushing technology spans over a century, with early developments documented as far back as 1919 when General Electric introduced standardized interchangeable bushing designs for power transformers. Today's Transformer Neutral Bushing represents the culmination of decades of engineering innovation, drawing from advanced materials science and rigorous international standards. Manufactured by industry leaders and precision engineering firms, these bushings are crafted from high-grade materials including cycloaliphatic epoxy resins, high-purity porcelain, or advanced silicone rubber compounds-each selected for their exceptional dielectric strength and environmental resilience. Power utilities, industrial facilities, and renewable energy developers worldwide rely on Transformer Neutral Bushings to ensure the safe, stable operation of their electrical infrastructure, from small distribution transformers to extra-high-voltage transmission systems exceeding 800 kV.
| Parameter | Range / Specification |
|---|---|
| Rated Voltage | 1.2 kV to 800 kV |
| Rated Current | Up to 6000 A |
| Insulation Technology | OIP (Oil-Impregnated Paper), RIP (Resin-Impregnated Paper), RIS (Resin-Impregnated Synthetic), or Solid Epoxy |
| Insulation Materials | High-grade Kraft paper, crepe paper, or synthetic mesh with aluminum foil grading electrodes |
| Outer Insulator Options | Porcelain, cycloaliphatic epoxy, or silicone rubber composite |
| Ambient Temperature Range | –50°C to +75°C |
| Flammability Rating | UL 94 V0 |
| Lightning Impulse Withstand (BIL) | Up to 2250 kV |
| Power Frequency Withstand压 | Up to 740 kV (wet) |
| Partial Discharge Limit | ≤10 pC at 1.5× line-to-ground voltage (factory new ) |
| Creepage Distance | Customizable per pollution level requirements |
Key Features
Superior Insulation Performance: Our Transformer Neutral Bushings utilize advanced condenser-graded insulation technologies-including OIP, RIP, and RIS designs-that deliver exceptional dielectric strength and impulse performance. The finely graded condenser cores, manufactured with premium Kraft paper and thin aluminum foil electrodes under high compression, ensure void-free, partial-discharge-free operation throughout the service life. This results in power factor limits as low as 0.35% for modern RIP and RIS designs, with partial discharge levels indistinguishable from background noise.
Robust Environmental Resistance:
Engineered to withstand extreme environmental conditions, our bushings feature hydrophobic silicone rubber or glazed porcelain outer insulators that resist pollution, moisture ingress, UV degradation, and temperature extremes from –50°C to +75°C. Composite material options provide lightweight construction with superior corrosion resistance and mechanical strength, making them particularly suitable for coastal, desert, and high-altitude installations.
Enhanced Safety and Reliability:
With partial discharge levels guaranteed below 10 pC at 1.5× line-to-ground voltage and power factor limits meeting or exceeding all major international standards, our bushings offer industry-leading electrical performance. The solid epoxy and RIS technologies eliminate the storage angle requirements of traditional OIP bushings, providing greater installation flexibility and reduced maintenance overhead. All products undergo 100% routine testing before shipment, including partial discharge measurement, power factor testing, and voltage withstand tests.
Seismic Compliance:
Selected models are designed to meet high seismic requirements per IEEE 693, ensuring reliable operation in seismically active regions. The robust mechanical construction, combined with flexible mounting flange options, provides excellent resistance to dynamic loads and ground accelerations.
Our Transformer Neutral Bushings are ideal for:
Liquid-Filled Power Transformers: Providing reliable neutral grounding for generator step-up units, autotransformers, and distribution transformers across all voltage classes.
Shunt Reactors: Ensuring stable operation and effective grounding, reducing overvoltage risks during switching operations.
Highly Polluted and Humid Environments: Featuring extended creepage distances, hydrophobic outer surfaces, and enhanced sealing systems to maintain performance under adverse conditions.
Outdoor and High-Stress Installations: With UV-resistant, weatherproof, and anti-aging construction designed for long-term outdoor exposure with minimal maintenance.
01
Custom Engineering Support
We offer fully customizable bushing solutions tailored to your specific technical specifications, voltage ratings, and dimensional requirements. Our engineering team works closely with your design staff to ensure seamless integration.
02
Global Standards Compliance
Our products are fully type-tested to applicable IEC and IEEE standards, ensuring seamless integration into any global power system. We provide complete type test reports and routine test certificates with every shipment
03
Technical Consultation
Our experienced engineering team provides professional guidance on insulation level selection (neutral bushings typically require lower withstand voltages than line terminals, with corresponding levels for 500 kV systems), current rating specifications (standard duty at 1.2× rated transformer current, 2× for K-rated transformers), and long-term storage and maintenance requirements.
04
Reliable Delivery
Leveraging our global manufacturing and supply network, we ensure fast, reliable delivery times and comprehensive after-sales support. Our inventory management system allows for rapid response to urgent project requirements.
We don't just sell Transformer Neutral Bushings-we deliver reliability, backed by decades of engineering expertise and uncompromising quality control. Every product is fully type-tested to IEC and IEEE standards, and every order is supported by our global technical team from specification to commissioning. Choose us, and choose a partner who treats your project's success as our own.
Contact us today. Let's build something lasting together.
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