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DRG High-Efficiency Electric Motors
DRG high-efficiency electric motors are three-phase motors built to IE3, IE4 and IE5 efficiency classes (IEC 60034-30-1), delivering more power with less energy. They cover 0.55 – 355 kW with a cast iron body and 100% copper winding, available from stock.
General Technical Specifications
| Feature | Value / Description |
|---|---|
| Power range | 0.55 – 355 kW |
| Efficiency class | IE3 / IE4 / IE5 (IEC 60034-30-1) |
| Voltage | 230/400 V – 400/690 V |
| Frequency | 50 / 60 Hz |
| Frame material | Cast iron (GG20) |
| Shaft | C45 carbon steel |
| Winding | 100% pure electrolytic copper |
| Bearings | SKF / C&U / NSK |
| Insulation | Class F (155 °C) |
| Protection | IP55 |
| Duty type | S1 (continuous) |
| Colour | RAL 7032 / 6028 / 5012 |
Efficiency Engineering and Materials
- High-grade silicon steel laminations – reduce magnetic losses
- 100% pure electrolytic copper windings – minimise resistive losses
- Optimised air gap – increases magnetic flux density
- Vacuum impregnation – strengthens winding insulation
- Cast iron body (GG20), C45 shaft, cast iron end cover, RAL powder coat
IE Classes and Energy Savings
| Class | Definition | Efficiency gain | Highlights |
|---|---|---|---|
| IE3 | Premium Efficiency | +8–10% vs standard | Mandatory above 0.75 kW, quiet and long-lasting |
| IE4 | Super Premium | +3–5% vs IE3 | Low-loss rotor, 55–70 dB, ≤1.5 mm/s |
| IE5 | Ultra Premium | +3–4% vs IE4 (up to 15% extra savings) | IoT / inverter ready, Industry 4.0, ultra quiet |
IE3 is the minimum requirement above 0.75 kW in Turkey and Europe; all motors comply with the Ecodesign regulation.
Noise and Vibration Performance
Noise levels (dB(A)):
| Efficiency class | Noise range | Description |
|---|---|---|
| IE3 | 58 – 75 dB(A) | Standard Premium motor |
| IE4 | 55 – 70 dB(A) | Super Premium Efficiency |
| IE5 | 52 – 68 dB(A) | Ultra-quiet design |
Vibration levels (RMS velocity – mm/s):
| Motor class | Vibration value | Standard |
|---|---|---|
| IE3 | ≤ 1.8 mm/s | ISO 10816 N Class |
| IE4 | ≤ 1.5 mm/s | ISO 10816 R Class |
| IE5 | ≤ 1.0 mm/s | High Precision Balance |
Noise and vibration tests follow EN 60034-9 and ISO 10816; every motor passes a G 2.5 dynamic balance test before shipment.
Thermal Design and Durability
- Max. winding temperature: 110 °C
- Max. bearing temperature: 80 °C
- Temperature rise: < 75 K
- Finned body optimises heat transfer; suitable for 24/7 (S1) operation
Why DRG High-Efficiency Series?
- Complete solution in IE3 / IE4 / IE5 from a single supplier
- 100% copper winding + optimised magnetic circuit for low losses
- Low energy cost and fast payback
- Quiet, balanced and long-lasting operation
- 0.55–355 kW from stock
- 2-year warranty, nationwide service and spare parts
Delivery, Warranty and After-Sales
Standard ratings ship from stock, with short lead times for special windings and high power. All products carry a 2-year warranty, backed by nationwide service and spare-part support.
Request a Quote
Get a price for the efficiency class (IE3/IE4/IE5), power and speed that fit your application:
Quick quote on WhatsApp | +90 542 666 11 11 | Contact & Quote Form
For details on efficiency classes and energy savings, see our high-efficiency motors content.