Medium voltage dry-type transformers are tested to ensure compliance with quality and performance standards:
No-Load Losses: Measured at rated voltage.
Load Losses: Assessed under full load conditions.
Percent Impedance: Verified at rated current.
Excitation Current Test: Conducted at 100% voltage.
Ratio Tests: Performed across all tap settings.
Polarity and Phase Relation Tests: Confirmed for correct orientation.
Induced Potential Tests: Ensures insulation strength.
Impulse Tests: Includes full wave and reduced wave scenarios.
| Specification | Details |
|---|---|
| KVA Ratings | 500, 750, 1000, 1500, 2000, 2500, 5000+ |
| No. of Phases | Single-Phase or Three-Phase |
| Frequency | 50 Hz – 60 Hz |
| Primary Voltage | 2.4 kV – 35 kV |
| Secondary Voltage | 480 V, 600 V, or other medium voltage ranges |
| Tapping Range | ±2 × 2.5% or ±5% |
| Winding Material | Copper, Aluminum |
| Cooling Type | AN (Air Natural), AF (Air Forced) |
| Mounting | Floor-Mounted |
Sound Level: Compliant with NEMA TR1 Noise Standards.
IEEE Compliance: Meets IEEE C57.12.01 Standards for dry-type transformers.
UL Certification: UL Listed for safe and compliant use.
Efficiency: DOE 2016 Efficiency Standards or higher.
Temperature Rise Options: 80°C, 115°C, 150°C.
Enclosure Type: Ventilated or Sealed, NEMA 1 (Indoor) or NEMA 3R (Outdoor).
Overcurrent Protection: Available with thermal-magnetic breakers or fuses.
Surge Protection: MOV Surge Arresters can be integrated.
Core Material: High-grade silicon steel for minimized core losses.
Winding Insulation: Class F or Class H insulation systems for thermal durability.
Enclosure Material: Steel or aluminum with optional corrosion-resistant coatings.
Quality System: ISO 9001 Certified manufacturing processes.
Routine Tests: Conducted per ANSI® and IEEE® standards for reliability.
Warranty: Comprehensive coverage for workmanship and performance.
