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Product Overview
IE4 Three Phase Induction Motor refers to a three-phase motor in which the stator winding, fed by a three-phase supply, produces a rotating magnetic field and the squirrel-cage rotor follows it with a small slip. No brushes or slip rings are involved, which is why this design is the standard industrial drive. The IE4 label means it meets the Super Premium Efficiency class of IEC 60034-30-1.
Poles from 2 to 8 cover speeds from about 690 to 2,980 rpm at 50 Hz, and the totally enclosed fan-cooled frame (IP55) with Class F insulation suits continuous duty. IE4 goes a step further with better-grade core steel, more copper in the slot, tighter air-gap control and reduced fan and friction losses, so waste heat is again roughly 15 to 20 percent lower than IE3.
For a buyer, the practical difference from an IE3 motor is lower running cost in exchange for a higher purchase price and a narrower power range. Because the induction principle is unchanged, mounting dimensions follow IEC frame standards and the motor fits existing equipment.
Main points for buyers
- 1Confirm the efficiency class. Check the IE4 marking and ask for efficiency at 100, 75 and 50 percent load, not only the class label.
- 2Match rated speed, not only pole count. A small slip difference changes fan and pump power noticeably.
- 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 IE4 Three Phase Induction 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 IE4 Three Phase Induction 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 | YE4 series | Private-label model name on the nameplate |
| Efficiency class | IE4 Super 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 160 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 | 220 V to 690 V and other voltages on request |
| 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 IE4 Three Phase Induction 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 |
| Pump and HVAC | Water pumps, booster sets, air-handling fans | Long running hours make efficiency gains visible on the energy bill |
| Compressors and blowers | Screw compressors, roots blowers, vacuum pumps | Steady load and high duty cycle suit premium-efficiency motors |
| Conveying and material handling | Belt conveyors, feeders, screw conveyors | Standard IEC frame sizes fit common gearboxes and reducers |
| Chemical processing | Agitators, process pumps, exhaust fans | Enclosed construction and Class F insulation for long continuous running |
| Export machinery and OEM equipment | Packaged machines shipped to regulated markets | Meeting the efficiency level avoids redesign and customs questions |
Target Customers
Suitable and Unsuitable Uses
- Pumps, fans and compressors that run most of the year
- Plants with high electricity tariffs or energy-saving targets
- New equipment where lifetime energy cost counts more than purchase price
- Equipment used a few hundred hours a year, where payback is long
- Projects where only the lowest purchase price counts
- Special explosion-proof or brake designs without confirming availability first
Selection Guidance
- 1Define the load. Set required shaft power, starting torque and duty cycle before looking at models.
- 2Choose the speed or type. Start from running hours: IE4 pays back fastest on loads that run for thousands of hours a year. Then confirm pole count, frame and mounting against the driven equipment.
- 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.
- Re-check the driven machine speed after replacing an older motor, since lower slip gives slightly higher shaft speed.
- Fit overload and thermal protection, and respect the permitted number of starts per hour.
