Products

Product Features

The 330kV oil-immersed three-phase double-winding unexcited voltage regulating power transformer is engineered for high-voltage transmission systems requiring stable, efficient, and reliable power conversion. It adopts a high-grade grain-oriented silicon steel core and optimized winding structure to ensure low no-load loss, reduced noise, and improved overall energy efficiency. The oil-immersed cooling system provides excellent heat dissipation, enabling safe and stable operation under heavy load conditions. With a robust insulation design and advanced manufacturing technology, the transformer delivers superior dielectric strength, strong short-circuit withstand capability, and low partial discharge performance. It is widely used in power substations, regional grid interconnections, and large-scale infrastructure projects where reliability is critical. Designed for long service life and minimal maintenance, it supports continuous operation in demanding environments. The product can also be customized according to specific technical standards, environmental requirements, and utility specifications, making it a dependable solution for modern high-voltage power networks.

Technical Specifications

330kV oil-immersed three-phase double-winding unexcited voltage regulating power transformer.

Applications

Customization Service

Certifications

Packing and Delivery

Product Design and Manufacturing Quality

Yawei Transformer applies strict quality control throughout the entire manufacturing process, including:

• Core cutting and assembly
• Winding production
• Vacuum oil filling
• Insulation system testing
• Temperature rise testing
• Partial discharge testing
• Factory acceptance testing (FAT)

Installation and Maintenance

1.Daily/Weekly Inspections
Visual check for oil leaks at gaskets, valves and welds. Verify oil & winding temperatures stay within normal limits. Listen for abnormal hum or buzz signalling loose core laminations or overload.
2.Monthly/Quarterly Checks
Check silica‑gel breather; regenerate/replace gel if pink (saturated). Confirm conservator oil level, top‑up with matching‑grade oil as needed. Clean bushings to avoid flashovers from dirt contamination.
3.Annual Maintenance
Run DGA test on insulating oil for early internal fault detection (arcing, overheating). Verify protective relays and alarm circuits work properly. Retighten external electrical connections; check tank paint and anti‑corrosion condition.
4.Long‑term Overhaul
Carry out major overhaul every 10‑15 years subject to service conditions and oil analysis. Works include oil draining, inspection of inner core and coil clamping parts, gasket replacement, and insulating‑oil reconditioning or full renewal.