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Product Overview
IE3 Low Voltage Motor refers to an IE3 three-phase asynchronous induction motor designed for supply voltages up to 1,000 V AC, the range used in nearly all industrial plant distribution. Common ratings are 380 V, 400 V and 415 V at 50 Hz, with 220 V, 440 V, 660 V and 690 V windings available for other markets. The stator winding creates a rotating field and the squirrel-cage rotor follows it with a small slip.
Low voltage design keeps starting equipment, cables, switchgear and terminal boxes simple and inexpensive compared with 3 kV, 6 kV or 10 kV motors. Terminal boxes carry six leads, so one motor can be star or delta connected, and dual-voltage windings such as 380 V delta and 660 V star let a single motor serve two supply levels.
Voltage is the first thing to confirm in an export order. IEC 60034-1 allows rated performance within plus or minus 5 percent voltage and plus or minus 2 percent frequency (Zone A), so a mismatch between nameplate and local supply shows up quickly as heat or weak torque.
Main points for buyers
- 1Confirm the efficiency class. Check the IE3 marking and ask for efficiency at 100, 75 and 50 percent load, not only the class label.
- 2Match the supply exactly. Compare nameplate voltage and frequency with the destination grid, and decide whether a dual-voltage winding is needed.
- 3Check the mechanical interface. Compare frame size, mounting (B3, B5 or B35), shaft diameter and flange with the driven equipment drawing.
- 4Lock down the electrical data. Confirm voltage, frequency and terminal connection before ordering, because special windings take longer than standard ones.
- 5Request the paperwork. Ask for CE and CCC documents, nameplate data and test reports so customs and your own customers have no questions.
When comparing quotations for IE3 Low Voltage Motor, look beyond the ex-works price. Rated power and frame size set the material content, while copper and silicon steel prices move the figure from month to month. Special voltage, 60 Hz windings, a higher protection class, brakes or encoders add cost, as do test reports and OEM packaging. Order quantity, container loading, sea freight, import duty and local VAT then decide the landed cost per unit, so ask each supplier to quote on the same Incoterm and the same rating.
Typical specification of the IE3 Low Voltage Motor. Values are standard offers; ratings, voltage and options can be adjusted to your order.
| Parameter | Standard Offer | Customization Options |
| Product type | Three-phase asynchronous induction motor, squirrel-cage rotor | ODM design from your working conditions |
| Model series | YE3 series | Private-label model name on the nameplate |
| Efficiency class | IE3 Premium Efficiency (IEC 60034-30-1) | Efficiency test report with the shipment on request |
| Number of poles | 2, 4, 6 or 8 | Pole count selected per order |
| Synchronous speed at 50 Hz | 3,000 to 750 rpm (2 to 8 poles) | Specify the pole count with the order |
| Rated speed at 50 Hz | 690 to 2,980 rpm depending on poles | Depends on power rating and supply frequency |
| Power range | 0.75 to 315 kW | Other ratings on request |
| Frame size | 80 to 315 | Special shaft or flange dimensions on request |
| Rated voltage | 380 V, 400 V or 415 V three-phase; dual-voltage windings available | 220 V to 690 V and other voltages on request |
| Supply tolerance | Plus or minus 5 percent voltage, plus or minus 2 percent frequency (IEC 60034-1 Zone A) | Wider tolerance on request after thermal check |
| Frequency | 50 Hz | 60 Hz winding and nameplate |
| Protection class | IP55 | IP56 or IP65 on request |
| Insulation and temperature rise | Class F insulation, Class B temperature rise | Class H insulation and thermistors on request |
| Duty type | S1 continuous | S2 to S8 on request after thermal check |
| Cooling method | IC411, totally enclosed fan-cooled | IC416 separate fan for VFD operation |
| Mounting | B3, B5 and B35 | V1 and other mounting forms |
| Housing material | Cast iron frame and end shields for most ratings | Aluminium frame on small ratings on request |
| Ambient and altitude | Minus 15 to plus 40 degrees C, up to 1,000 m | Higher altitude or temperature with derating |
| Options | Standard motor without options | Brake, encoder, space heater, explosion-proof, VFD-ready design |
| Certification and quality system | ISO9001, China CCC, EU CE | Inspection and test documents on request |
| Nameplate, color and packaging | Standard nameplate, standard color, export carton | OEM nameplate, RAL color, wooden case |
Final values for a given rating are confirmed on the datasheet issued with your quotation.
Application
The IE3 Low Voltage Motor is used wherever a reliable, efficient three-phase drive is needed. The sections below cover typical industries, buyer types, selection and day-to-day use.
Application Scenarios
| Industry | Typical Equipment | Why It Fits |
| Export machinery | Machines shipped to regions with different grid voltages | Winding is matched to the destination supply, so no transformer is needed |
| Pump and HVAC | Water pumps, fans, air-handling units | Standard 380 V to 415 V ratings fit most plant distribution |
| Mining and port equipment | Conveyors, winches, auxiliary drives | 660 V and 690 V windings suit larger sites with higher supply voltage |
| Textile and machine tools | Looms, spinning machines, machining centers | Simple starters and cabling keep installation cost low |
| Chemical processing | Agitators, process pumps, exhaust fans | Low voltage panels are easy to service and extend |
Target Customers
Suitable and Unsuitable Uses
- Standard plant distribution at 380 V, 400 V or 415 V
- Export machinery shipped to regions with different supply voltages
- Projects that need simple starters, cables and switchgear
- Very large ratings where medium-voltage supply is the norm
- Supplies above 1,000 V AC
- Sites with unstable voltage outside plus or minus 5 percent and no stabilizer
Selection Guidance
- 1Define the load. Set required shaft power, starting torque and duty cycle before looking at models.
- 2Choose the speed or type. Fix the supply voltage and frequency first, then choose the winding. For dual-voltage supplies, ask for a six-lead terminal box and confirm the star or delta connection on the nameplate.
- 3Set the environment. Note ambient temperature, altitude, dust, moisture and whether IP55 or higher is needed.
- 4Fix the interface. Confirm voltage, frequency, mounting type, shaft size and the documents your market requires.
Usage Notes
- Compare supply voltage and frequency with the nameplate before connecting, and stay within plus or minus 5 percent voltage.
- Check that the star or delta connection matches the nameplate and the supply.
- Measure insulation resistance before the first start, and again after long storage or damp conditions.
- Align the coupling or set belt tension correctly, since misalignment is a leading cause of early bearing failure.
- Keep the fan cover clear and leave space for airflow around the frame.
- Do not change the terminal link arrangement unless the nameplate shows a dual-voltage winding.
- Fit overload and thermal protection, and respect the permitted number of starts per hour.
