Products

Product Features

1. Three-winding Transformer Design
The three-winding configuration allows the transformer to connect multiple voltage levels within a power network. It is suitable for applications requiring power exchange between high-voltage, medium-voltage, and low-voltage systems.

Typical applications include:

• 110kV substation systems
• Power plant auxiliary power supply
• Industrial power distribution networks
• Renewable energy collection systems
• Regional power grids

The three-winding design helps reduce the number of transformers required in complex electrical systems while improving overall system flexibility.

2. On-load Voltage Regulation Capability
Equipped with an on-load tap changer (OLTC), the transformer can adjust the output voltage without interrupting power transmission.
The on-load voltage regulation system helps:

• Maintain stable output voltage
• Improve power quality
• Reduce voltage fluctuations caused by load changes
• Enhance grid operation reliability

This feature is especially important for substations and power networks with continuously changing loads.

3. Advanced Oil-immersed Cooling System
The transformer uses high-quality insulating oil for electrical insulation and heat dissipation.
The oil circulation system effectively transfers heat generated by:

• Core losses
• Winding losses
• Load operation

Common cooling methods include:

The optimized cooling design ensures safe operation under heavy load conditions.

Technical Specifications

110kV oil-immersed three-phase three-winding on-load 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.