275kV, 150kV, 20kV, 83.3MVA Power Transformer
Standard
IEC 60076, IEC 60214, IEC 60071, IEC 60529, IEEE C57, ANSI, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO/IEC 17025
Warranty
24 months after commissioning
Lead Time
12 months
TESTING
Routine Tests
- Visual and dimensional inspection
- Winding resistance measurement
- Transformer Turns Ratio (TTR) test
- Vector group and polarity verification
- No-load loss and excitation current measurement
- Load loss and short-circuit impedance measurement
- Applied AC withstand voltage test
- Induced AC overvoltage withstand test
- Insulation resistance measurement
- Dielectric oil breakdown voltage test
- Moisture content analysis
- OLTC operational and functional testing
- Leak and pressure tests
- Bushing electrical testing
- Current Transformer (CT) verification
- Mechanical inspection and final documentation review
Type and Special Tests (as specified)
- Lightning Impulse Withstand Test (LI)
- Temperature Rise Test
- Partial Discharge Measurement
- Sound Level Measurement
- Short-Circuit Withstand Verification
- Zero-Sequence Impedance Test
- Dissolved Gas Analysis (DGA)
Customer Witness Factory Acceptance Test (FAT)
Product Features
- Three-winding transformer engineered for 275 kV transmission and sub-transmission networks.
- Rated 3 MVA for continuous operation with high overload capability.
- Premium grain-oriented silicon steel core for reduced no-load losses and low operating noise.
- High-conductivity copper windings with superior mechanical strength against short-circuit forces.
- Advanced insulation system providing excellent dielectric performance and extended service life.
- Efficient ONAN/ONAF cooling system for dependable thermal performance.
- Precision On-Load Tap Changer (OLTC) ensuring stable voltage regulation under varying load conditions.
- Low partial discharge design to maximize insulation reliability.
- Heavy-duty welded steel tank with corrosion-resistant coating for tropical, coastal, and industrial environments.
- Conservator system with rubber bladder or diaphragm to preserve insulating oil quality.
- High-performance radiators with optional automatic cooling fan control.
- Intelligent online monitoring options available, including:
- Dissolved Gas Analysis (DGA)
- Fiber-optic winding temperature monitoring
- Top oil temperature indicator
- Moisture-in-oil monitoring
- Bushing condition monitoring
- Online OLTC monitoring
- Designed for a service life exceeding 40 years with proper maintenance.
- Fully customizable to meet utility, renewable energy, industrial, and infrastructure project requirements.