20 kV dry-type power transformers
Standard
IEC 60076, IEC 60076-11 (Dry-Type Power Transformers), IEEE, ANSI, ISO 9001
Warranty
18 months after commissioning
Lead Time
2.5 months
TESTING
Routine Testing
- Visual inspection and dimensional verification.
- Winding resistance measurement.
- Transformer turns ratio (TTR) verification.
- 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 overvoltage withstand test.
- Partial discharge measurement.
- Insulation resistance test.
- Temperature controller functional verification.
- Cooling fan operational test (when applicable).
- Mechanical assembly and terminal inspection.
- Final nameplate, documentation, and quality inspection.
Optional Type Tests
Available upon customer request or project specification:
- Temperature rise test.
- Lightning impulse withstand test (LI/BIL).
- Short-circuit withstand verification.
- Sound level measurement.
- Dielectric discharge analysis.
- Seismic qualification.
- Environmental performance testing.
- Customer witness testing.
PRODUCT FEATURES
- Available in three-phase configurations for 20 kV distribution systems.
- Power ratings available from approximately 100 kVA to 25 MVA (custom ratings available upon request).
- Vacuum Pressure Impregnated (VPI) or Cast Resin insulation systems.
- Oil-free design eliminates fire hazards and environmental contamination risks.
- Self-extinguishing insulation with excellent flame-retardant performance.
- High mechanical strength for superior short-circuit withstand capability.
- Low partial discharge levels for enhanced insulation reliability and longer service life.
- High-efficiency silicon steel core designed to minimize no-load losses and operating noise.
- Copper or aluminum windings available to meet project specifications.
- Class F (155°C) or Class H (180°C) insulation systems with temperature rise options to suit application requirements.
- Natural Air (AN) cooling with optional Forced Air (AF) cooling for increased capacity.
- Digital temperature monitoring system with PT100 sensors and intelligent temperature controller.
- Optional remote monitoring and SCADA integration.
- Low vibration and quiet operation suitable for hospitals, schools, office buildings, and data centers.
- Compact footprint for easy installation in confined electrical rooms.
- Moisture-resistant and pollution-resistant construction for harsh environments.
- Maintenance-friendly design with minimal servicing requirements.
- Optional IP20, IP23, IP31, IP44, or higher enclosure protection depending on installation requirements.