200kVA Three-Phase Oil-Immersed Transformer for Urban & Rural Power Distribution

The HENTG POWER 100kVA 10kV/0.4kV Three-Phase Oil-Immersed Transformer is a premium, energy-efficient distribution solution engineered for reliability and durability in demanding global power applications. Designed to step down medium voltage from 10kV to a stable 400V/230V output, this transformer is built to meet and exceed international standards including IEC 60076 and IEEE C57. Its ONAN (Oil Natural Air Natural) cooling system ensures efficient heat dissipation, making it an ideal choice for industrial facilities, commercial complexes, renewable energy farms, mining operations, and rural electrification projects, particularly in challenging environments like Africa. Combining advanced low-loss technology with robust construction, it delivers safe, stable, and cost-effective power distribution.

• Superior Energy Efficiency & Low Loss Design: Engineered with high-grade, grain-oriented silicon steel core and low-resistance copper windings, this transformer achieves exceptionally low no-load and load losses. This design surpasses standard benchmarks, reducing total energy consumption by up to 30% over its lifespan, translating to significant operational cost savings and supporting sustainable energy goals.
• Robust & Sealed Construction for Harsh Environments: Specifically designed for durability, the transformer features a fully sealed, corrugated steel tank with a multi-layer anti-corrosion epoxy coating. This construction effectively resists dust, moisture, and salt spray, making it exceptionally reliable for outdoor installation in arid, coastal, or dusty regions like many parts of Africa, ensuring a long service life with minimal maintenance.
• High Safety & Operational Reliability: Integrated with multiple protection features including a pressure relief valve, temperature indicator, and Buchholz gas relay, the transformer provides comprehensive safety monitoring. The use of high-quality, flame-retardant insulating oil enhances internal insulation and fire safety, ensuring secure operation for personnel and equipment.
• Flexible Customization & Global Compliance: We offer extensive customization options, including different winding materials (copper/aluminum), connection groups (Dyn11, Yyn0), voltage taps, and protection grades (up to IP23). Every unit is manufactured to comply with major international standards (IEC, IEEE, GB), ensuring seamless integration into diverse global power grids and project specifications.
• Proven Quality & Expert Support: Backed by over 15 years of manufacturing expertise and a 100,000 m² production facility, HENTG POWER guarantees product quality. We provide end-to-end project support, from technical consultation and customization to after-sales service, ensuring a smooth experience for EPC contractors and distributors.

Pain Point: In regions with pervasive sand and dust, conventional transformers are highly susceptible to oil leakage. Fine dust particles infiltrate and degrade gasket seals, while daily thermal cycling and vibration can loosen bolted connections. This leads to environmental contamination, frequent and costly maintenance, unscheduled downtime, and potential safety hazards.

Our Engineered Solution: Our transformer incorporates a Dust-Proof and Leakage-Resistant Sealing System specifically designed for such environments.

• Enhanced Sealing Gaskets: We utilize high-grade nitrile rubber gaskets with superior temperature and aging resistance, specially formulated to withstand abrasive dust without hardening or cracking.
• Reinforced Flange Design: Critical flange joints feature a multi-bolt, staggered fastening pattern that ensures even pressure distribution on the gasket, creating a more reliable seal that resists loosening from vibration.
• Sealed Welding & Construction: The corrugated tank is constructed with continuous welding techniques and undergoes rigorous pressure testing to eliminate weak points. All bushings and accessories are mounted using sealed fittings.
• Protective Coating: The entire tank exterior, including weld seams and flanges, receives a robust, multi-layer epoxy powder coating that acts as a barrier against corrosion and dust abrasion, preserving the integrity of the sealed structure.

Q: What is the typical delivery lead time for an order of 10 units to a port in West Africa?

A: For standard 100kVA configurations, the production and shipping lead time is approximately 25-30 days to major African ports like Lagos or Tema. Customized specifications may require 35-40 days. We handle full export documentation including CI, PL, BL, and Certificates of Origin/Conformity.

Q: Can this transformer be customized for specific grid codes or voltage requirements in different African countries?

A: Absolutely. We routinely customize parameters like primary voltage (e.g., 11kV, 13.8kV), vector group, tap settings, and bushings to meet local utility standards in countries across Africa. Our engineering team provides consultation to ensure compliance.

Q: How does the transformer perform in high ambient temperatures (above 45°C) common in Africa?

A: The ONAN cooling system and design account for high temperatures. We can provide units with a higher temperature rise rating (e.g., 65K) or Class B insulation upon request. The corrugated tank also provides excellent natural heat dissipation.

Q: Do you offer installation supervision, commissioning, or after-sales technical support?

A: Yes, we provide comprehensive project support. This can include detailed installation manuals, online commissioning guidance, and on-site technician dispatch (subject to agreement). We also offer a standard 2-year warranty and 24/7 remote technical support.

Q: Are your products certified for use in Africa? Do they have CE marking?

A: Our transformers are manufactured to IEC standards, which are widely accepted across Africa. They carry CE certification, and we can also provide test reports from accredited labs. For specific country certifications, please consult with our team.

Q: What makes your transformer suitable for dusty and sandy environments compared to standard models?

A: Beyond the sealed tank, we use gasket materials resistant to dust abrasion, apply protective coatings on all external metalwork, and can offer raised bushings to prevent sand accumulation. Each unit for such environments undergoes extended sealing integrity tests.