Rectifier Power Supply
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This page explains how Main Transformer is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
The primary voltage transformation component in a rectifier power supply system that steps down or steps up AC voltage to the required level before rectification.
Technical details and manufacturing context for Main Transformer
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Power | 100–2500 kVA | Matches rectifier output and duty cycleIEC 60076 |
| Primary Voltage | 6–35 kV | Grid input voltageIEC 60076 |
| Secondary Voltage | 0.4–3 kV | Matched to rectifier inputIEC 60076 |
| Impedance Voltage | 4–10 % | Affects fault current and voltage regulationIEC 60076 |
| No-Load Loss | 0.2–5 kW | Continuous cost factorIEC 60076 |
| Load Loss | 1–20 kW | Depends on load currentIEC 60076 |
| Insulation Class | F–H | Thermal endurance of insulationIEC 60085 |
| Cooling Method | ONAN–OFAF | Determines cooling capacityIEC 60076 |
| Temperature Rise | 60–80 K | Above ambient at rated loadIEC 60076 |
| Efficiency | 98–99.5 % | At 100% loadIEC 60076 |
| Insulation Level | LI 60–170 kV | Lightning impulse withstandIEC 60076 |
| Weight | 500–8000 kg | Handling and foundation |
| Dimensions (L×W×H) | 1000×800×1200–2500×1500×2000 mm | Space constraints |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Atmospheric to 1.5 bar absolute (sealed units), altitude up to 1000m |
| other spec: | Frequency: 50/60 Hz ±5%, humidity: ≤95% non-condensing, insulation class: F or H standard |
| temperature: | -40°C to +120°C (ambient), 130°C max winding temperature rise |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
Manufacturer profiles associated with Main Transformer.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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It adjusts the incoming AC voltage to the level required by the rectifier circuitry, enabling efficient conversion to DC power. It also provides isolation and influences regulation and efficiency.
Key parameters include rated power, primary and secondary voltages, impedance voltage, losses, insulation class, cooling method, temperature rise, efficiency, insulation level, weight, and dimensions. These must match the rectifier's requirements and be confirmed with the manufacturer.
IEC 60076 covers power transformers, including rated power, voltages, impedance, losses, and cooling. IEC 60085 defines insulation classes. Compliance with these standards should be verified with the supplier.
Cooling methods such as ONAN and OFAF determine the transformer's ability to dissipate heat. The choice affects the temperature rise and the maximum load capacity. Proper cooling is essential for maintaining insulation life and performance.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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