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DRG Three-Phase Asynchronous Electric Motors
DRG three-phase asynchronous electric motors run on a 400 / 690 V three-phase supply across a 0.55 – 355 kW range, with a cast iron body. Available in IE3, IE4 and IE5 efficiency classes, with high torque and long life, they ship from stock for heavy industry, automation and production lines.
General Technical Specifications
| Feature | Value / Description |
|---|---|
| Power range | 0.55 – 355 kW |
| Efficiency class | IE3 / IE4 / IE5 |
| Voltage | 400 / 690 V |
| Frequency | 50 / 60 Hz |
| Speed options | 750 / 1000 / 1500 / 3000 rpm |
| Frame material | Cast iron (GG20) |
| Insulation | Class F (155 °C) |
| Protection | IP55 |
| Cooling | IC411 |
| Mounting types | B3, B5, B14, B35 |
| Duty type | S1 (continuous) |
| Noise | 58 – 75 dB(A) |
| Vibration | ≤ 1.8 mm/s (ISO 10816) |
| Certificates | CE – ISO – LVD – EMC – EAC |
Construction and Components
- Stator: 100% pure electrolytic copper winding, vacuum-impregnated insulation
- Rotor: squirrel-cage type
- Body: cast iron (GG20) – vibration-damping, high strength
- Fan: aerodynamic cooling fan, optimised blades
- Bearings: SKF / C&U / NSK – high-temperature, long life
- End covers: cast iron, centred on the shaft bearing for balance
All motors are produced to EN 60034, IEC 60072 and ISO 9001 standards.
Efficiency Classes and Energy Savings
DRG produces all three-phase series in IE3, IE4 and IE5 levels. In Turkey and Europe, IE3 is the minimum requirement above 0.75 kW; all motors comply with the Ecodesign regulation.
| Class | Definition | Efficiency gain | Energy saving |
|---|---|---|---|
| IE3 | Premium Efficiency | +8–10% vs IE2 | up to 10% |
| IE4 | Super Premium | +3–5% vs IE3 | up to 13% |
| IE5 | Ultra Premium | +8–9% vs IE3 | up to 20% |
Noise, Vibration and Thermal Performance
Noise levels (dB(A)):
| Power range | Speed | Noise level | Test standard |
|---|---|---|---|
| 0.55 – 7.5 kW | 1500 rpm | 58 – 62 dB(A) | EN 60034-9 |
| 11 – 55 kW | 1500 rpm | 63 – 67 dB(A) | EN 60034-9 |
| 75 – 200 kW | 1500 rpm | 68 – 72 dB(A) | EN 60034-9 |
| 250 – 355 kW | 1500 rpm | 72 – 75 dB(A) | EN 60034-9 |
Vibration levels (RMS velocity – mm/s):
| Test standard | Value | Description |
|---|---|---|
| ISO 10816 – Normal | ≤ 1.8 mm/s | Standard industrial operation |
| ISO 10816 – Low vibration | ≤ 1.2 mm/s | For precision systems |
Thermal design and cooling: max. winding temperature 110 °C, max. bearing temperature 80 °C, temperature rise < 75 K, optional PTC / PT100 sensor. Symmetric body channels keep thermal balance even in continuous duty.
Quality Tests (Post-Production)
- Winding resistance and insulation test (500 V Megger)
- Rotor balance test – G 2.5 standard
- Noise test – EN 60034-9
- Vibration analysis – ISO 10816
- Load test (under rated torque)
- Thermal camera temperature check
- Continuous run test (S1 duty – 2 hours)
- Current stability and torque measurement
Applications
- Crushing & screening plants
- Pump and fan systems
- Compressors
- Geared drive systems
- Conveyor belts
- Agitators and mixers
- Hydraulic presses
- Cooling towers
- Agricultural and construction equipment
Why DRG Three-Phase?
- High starting torque – stable operation even under heavy load
- Cast iron body – resistant to vibration, impact and high temperature
- Low noise and vibration – for quiet production environments
- High efficiency – IE3, IE4, IE5 class energy savings
- Long-life bearings and winding – over 40,000 hours
- From stock – all ratings from 0.55 to 355 kW
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 power, speed, frame and efficiency class that fit your application:
Quick quote on WhatsApp | +90 542 666 11 11 | Contact & Quote Form
For details on asynchronous motor operating principles and efficiency, see our asynchronous / AC motors content.