Product Introduction
Overview
• A 230–500 kV power transformer is designed for bulk power transmission with high efficiency, thermal endurance, and dielectric reliability. Optimized core geometry and precision winding control reduce losses and manage short-circuit stresses. Robust insulation systems, advanced cooling design, and comprehensive testing support stable operation, extended service life, and predictable performance under demanding grid conditions.
Application
• Designed for extra-high-voltage transmission networks, 230–500 kV power transformers support bulk power transfer between generation sources, transmission corridors, and major substations. They enable long-distance energy delivery, grid interconnection, and voltage stabilization under high load variability. Robust electrical, thermal, and mechanical design helps utilities maintain system reliability, manage fault conditions, and ensure secure operation of large-scale power systems.
Advantages
• 230–500 kV power transformers offer low losses, robust short-circuit strength, and high insulation margins, supporting stable operation under fluctuating loads and network faults. Advanced cooling, optimized core design, and precise winding control extend service life and reduce maintenance interventions, helping utilities manage lifecycle costs while maintaining grid reliability, voltage stability, and overall transmission efficiency under diverse operating and environmental conditions.
Feature
• 230–500 kV power transformers feature step-lap low-loss cores, precision disk or helical windings, and reinforced clamping structures to withstand short-circuit forces. Multi-level insulation systems, on-load tap changers, and optimized oil or forced-directed cooling support voltage regulation, thermal stability, and reduced losses. Integrated monitoring options enable condition assessment and data-driven maintenance planning for reliable transmission performance under diverse grid operating scenarios.
Environmental Conditions
• Type: outdoor
• Ambient temperature: max. Temperature: +50℃; min. temperature: -55℃
• Altitude: ≤1000m (temperature rise shall be corrected when 1000m)
• Relative humidity: ≤90% (25℃)
• Installation place: without corrosive gas and apparent fouling.
Fittings
| Standard fittings | Optional Fittings |
|---|---|
| Primary bushings (OIP / RIP) | RTCC panel |
| Secondary bushings | Automatic voltage regulator (AVR) |
| Buchholz relay | Terminal connectors |
| Off circuit / On-load tap changer | Online dissolved gas analyzer (DGA) |
| Pressure relief device / explosion vent | Provision of Nitrogen injection fire protection system (NIFPS) |
| Thermometer | Aircell in Oil conservator |
| Silica gel breather | Aircell rupturing relay |
| Drain / Filter valves | Impact recorder |
| Oil level gauge | Smart breather |
| Rating & diagram plate | Sudden Pressure Relay |
| Lifting lugs | Oil filter unit for OLTC |
| Skid base / roller arrangement | Thermocycle Filter |
| Winding temperature indicator with alarm and trip contacts | Surge Arrester / Snubber circuit for supply terminals |
| Oil temperature indicator with alarm and trip contacts | |
| Magnetic Level Gauge |
