Cast coil transformers undergo thorough testing for quality and reliability:
No-Load Losses: Measured at rated voltage.
Load Losses: Assessed under rated current 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: Ensured for proper orientation.
Induced Potential Tests: Checks insulation and durability.
Impulse Tests: Full wave and reduced wave testing conducted.
| Specification | Details |
|---|---|
| KVA Ratings | 100, 500, 1000, 1500, 2000, 3000, and higher |
| No. of Phases | Single-Phase or Three-Phase |
| Frequency | 50 Hz – 60 Hz |
| Primary Voltage | 2.4 kV – 35 kV |
| Secondary Voltage | 208 V – 600 V or other application-specific ranges |
| Tapping Range | ±2 × 2.5% |
| Winding Material | Copper, Aluminum |
| Cooling Type | AN (Air Natural), AF (Air Forced) |
| Insulation Material | Epoxy Resin Encapsulation |
| Mounting | Floor-Mounted |
Sound Level: Designed to meet NEMA Noise Standards.
IEEE Compliance: Meets IEEE C57.12.01 Standards for encapsulated dry-type transformers.
UL Certification: UL Listed for indoor and outdoor use.
Efficiency: DOE 2016 Standard Compliant.
Temperature Rise Options: 80°C, 115°C, 150°C.
Enclosure Type: Ventilated or Sealed, NEMA Type 1 (Indoor) or Type 3R (Outdoor).
Overcurrent Protection: Thermal-magnetic breaker or fuses.
Surge Protection: MOV Surge Arresters available on request.
Core Material: High-grade silicon steel optimized for efficiency.
Insulation: Cast epoxy resin with superior thermal and mechanical properties.
Enclosure Material: Steel or aluminum, with optional corrosion-resistant coatings.
