| 1. GENERAL | ||
| Transformer Type | Three-phase, dry-type transformer, suitable for indoor installation | |
| Applicable Standards |
IEC 60076 – Power Transformers IEC 60076-11 – Dry-Type Transformers IEC 60076-5 – Short-Circuit Withstand IEC 60076-10 – Sound Level |
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| 2. ELECTRICAL RATINGS | ||
| Rated Power | kVA | ___ |
| Primary Voltage | kV | ___ |
| Secondary Voltage | V | ___ |
| Frequency | Hz | 50 |
| Connection Vector Group | Dyn11 (typical) / Yyn0 / As specified | |
| Cooling Method | AN (Air Natural) / ANAF (Air Natural Air Forced) | |
| Insulation Class | Class F or Class H | |
| Temperature Rise | °C |
≤ 100°C for Class F ≤ 125°C for Class H |
| 3. PERFORMANCE | ||
| Efficiency | As per IEC 60076-20 or local MEPS | |
| Impedance Voltage | % | ___ (typical 4 – 6%) |
| Noise Level | As per IEC 60076-10 | |
| Partial Discharge | pC | < 10 |
| Short-Circuit Withstand | Complies with IEC 60076-5 | |
| Cooling Fans (ANAF) | Automatic, temperature-controlled | |
| 4. CONSTRUCTION | ||
| Core | High-grade, grain-oriented CRGO silicon steel | |
| Step-lap joint for reduced losses | ||
| Anti-corrosion coating | ||
| Windings – Option A (Cast Resin) | LV and HV windings fully encapsulated in epoxy resin | |
| High mechanical strength for short-circuit withstand | ||
| Conductors: Copper (standard) or Aluminium (if specified) | ||
| Windings – Option B (VPI Type) | Copper windings vacuum pressure impregnated with epoxy varnish | |
| Class F or H insulation | ||
| Conductors: Copper (standard) or Aluminium (if specified) | ||
| Enclosure | IP21 / IP31 / IP41 / IP54 | |
| Ventilated steel enclosure with access doors | ||
| Color: RAL 7032 or RAL 7035 | ||
| Base channels for forklift movement | ||
| 5. STANDARD ACCESSORIES | ||
| Temperature Sensors | PT100 for LV and HV windings | |
| Temperature Controller |
Digital type with alarm relay, trip relay, fan control (if equipped) |
|
| Terminal Boxes | LV and HV terminal connection box | |
| Earthing | Earthing bar | |
| Nameplate | Stainless steel | |
| Optional Accessories |
Surge arresters Wheels Anti-vibration pads K-factor for nonlinear load applications |
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| 6. PROTECTION & SAFETY | ||
| Overtemperature Protection | Alarm and trip | |
| Overcurrent Protection | Upstream circuit breaker | |
| Touch Safety | IP-rated | |
| Mechanical Safety | Enclosure with mechanical interlocks (if required) | |