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Views: 0 Author: Site Editor Publish Time: 2026-09-09 Origin: Site
Recently, a large oil-immersed power transformer manufactured by Pearl Electric completed all factory inspections and was officially loaded for shipment, destined for an overseas customer project site via ocean freight.
This unit is a large main transformer custom-engineered for overseas high-end grid markets, designed and manufactured in strict compliance with IEC/IEEE/ANSI international standards. Key performance indicators — including insulation structure, thermal rise control, and short-circuit withstand capability — meet advanced international levels. Prior to shipment, the transformer underwent a full suite of routine and type tests to ensure reliable operation following long-distance sea transport and on-site installation.
For ocean-going logistics, Pearl Electric applied specialized protective packaging to both the transformer body and accessories. Critical components such as high-voltage bushings and cooling systems received moisture-proof and anti-vibration treatment, while accompanying accessories were packed in dedicated wooden crates, ensuring product integrity throughout intercontinental transport.
In recent years, Pearl Electric has continuously deepened its presence in overseas high-end power equipment markets. Its large transformer products have been widely deployed in grid upgrading and renewable energy integration projects across multiple countries and regions. Backed by a comprehensive quality management system and full-chain delivery capability, Pearl Electric remains committed to providing reliable products and services for global power infrastructure development.
Pearl Electric offers a comprehensive range of large oil-immersed power transformers engineered for utility, industrial, and renewable energy applications. We can customize all units to meet specific project requirements.
Parameter | Specification |
|---|---|
Rated Capacity | 5 – 200 MVA (customized) |
Rated HV | 34.5, 66, 69, 110, 115, 132, 138, 220, 230 kV (customized) |
Rated LV | 13.2, 13.8, 34.5, 69 kV, etc. (customized) |
Reference Standards | IEC 60076 / IEEE / ANSI |
Rated Frequency | 50 Hz / 60 Hz |
Cooling Method | ONAN / ONAF |
Winding Material | Copper / Aluminum |
Core Material | High-permeability grain-oriented cold-rolled silicon steel |
Tap Changer | Off-circuit / On-load; ±2×2.5% or customized |
Impedance Voltage | 4 – 8% or customized |
Insulation Oil | Mineral oil / Vegetable oil / Silicone oil |
Temperature Rise | 65 K (winding) / 60 K (oil) or customized |
Vector Group | Dyn11, YNd11, or customized |
All large oil-immersed transformers are designed and tested to IEC 60076, IEEE, and ANSI standards, ensuring compatibility with global grid codes and project specifications.
High-permeability grain-oriented silicon steel cores and optimized winding designs minimize no-load and load losses, contributing to lower operating costs and reduced carbon footprint over the product lifecycle.
Advanced structural design and rigorous short-circuit testing ensure the transformer can withstand external fault currents without mechanical deformation or insulation damage.
Each unit is tailored to customer requirements, including voltage ratios, impedance, cooling type, tap changer configuration, and special oil options (vegetable or silicone oil for environmentally sensitive applications).
Every transformer undergoes a complete range of routine tests (ratio, resistance, no-load, load, impedance, dielectric) and optional type tests before shipment, with full test reports provided to customers.
Export-grade packaging includes moisture-proof sealing, anti-vibration cushioning, and dedicated wooden crates for accessories, specifically designed to protect equipment during long-haul ocean transport.
Pearl Electric Co., Ltd. is a national high-tech enterprise headquartered in Nansha District, Guangzhou, China. The company specializes in the research, development, manufacturing, and sale of power transmission and distribution equipment, including oil-immersed power transformers up to 220 kV, dry-type transformers up to 35 kV, pad-mounted transformers, prefabricated substations, and reactors.
As the first enterprise in China to obtain a civil nuclear safety equipment design and manufacturing license, Pearl Electric is a recognized leader in nuclear-grade dry-type transformers, with over 90% coverage in domestic nuclear power projects. The company is also a pioneer in renewable energy transformers, with more than 120,000 units deployed in wind and solar projects nationwide.
Pearl Electric's products are exported to utility, industrial, and renewable energy customers across multiple continents. The company holds a range of international certifications, including CE, UL, and TÜV, and maintains a comprehensive quality management system to ensure consistent product excellence. With a commitment to innovation, reliability, and customer satisfaction, Pearl Electric continues to expand its global footprint as a trusted partner in power infrastructure.
