220kV Oil Immersed Power Transformer | High Voltage Substation Main Transformer Manufacturer IEC Standard

Hanzhong Xinsanhuan Transformer Co., Ltd. offers 220kV oil-immersed transformers with outstanding comprehensive advantages. Manufactured in dust-free, constant-temperature, enclosed workshops, these products strictly adhere to domestic standards (GB1094, GB/T6451) and international standards (IEC60076, EN, ANSI). They feature low-loss cores made from high-permeability grain-oriented silicon steel—reducing no-load loss by 22% and achieving National Grade I energy efficiency—and reinforced windings that pass 110% rated short-circuit current type tests, ensuring high impact resistance. The units exhibit partial discharge levels ≤50pC and utilize a triple-sealed welded tank design that extends insulating oil lifespan by 40%. Operating noise is ≤62dB, and the ODAF high-efficiency cooling system supports stable long-term operation at 105% load. Designed for harsh outdoor environments—including temperature extremes (-40°C to +45°C) and high-pollution mountainous areas—the transformers feature a wide-range voltage regulation structure (±8 taps) and a six-level safety protection system for rapid fault response. They also include interfaces for intelligent monitoring and boast a design service life of up to 30 years. As a specialized local manufacturer of high-voltage equipment, the company holds full qualifications, maintains stable production capacity, and ensures efficient delivery. It also provides a dedicated after-sales team for the Southern Shaanxi region, offering a 2-hour emergency response and 24-hour on-site maintenance, alongside one-stop services covering custom manufacturing, installation and commissioning, and ongoing operation and maintenance. These transformers are suitable for a wide range of applications, including power grid hubs, new energy step-up stations, and large-scale industrial and mining facilities.