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IE3 Industrial Induction Motor

-- Steady & Reliable Manufacturer --

Brief Product Description

Efficiency ClassIE3 Premium Efficiency
Pole Count and Speed2, 4, 6 or 8 poles, about 690 to 2,980 rpm depending on poles
Power Range0.75 to 355 kW
Frame Size80 to 355
Voltage and Frequency380 V, 400 V, 415 V, 50 Hz (60 Hz on request)
Protection and InsulationIP55, Insulation Class F
CustomizationOEM, ODM, special voltage, 60 Hz, brake, VFD
Samples and MOQSamples available, small trial orders accepted

IE3 Industrial Induction Motor from Zhejiang Kuayue Motor is a three-phase asynchronous induction motor designed to the IE3 Premium Efficiency class of IEC 60034-30-1. The induction design has no brushes or slip rings, so it is the proven, low-maintenance choice for continuous industrial duty. Against an IE2 motor of the same rating, it wastes roughly 15 to 20 percent less energy as heat, which is why distributors and OEMs treat it as the standard export specification.

Typical buyers include machinery OEMs, maintenance buyers, distributors and plant owners who value simplicity and spare-part availability. They usually purchase against a drawing or an existing equipment specification, so the motor has to match shaft, frame and mounting exactly, not only the kilowatt rating. Many of them also resell under their own brand, so consistent quality across batches and clear technical documents matter as much as the unit price.

When comparing offers, the parameters that matter most are efficiency class and test data, rated speed, power range (0.75 to 355 kW), frame size, voltage and frequency, protection class (IP55) and insulation class (F). For IE3, also confirm efficiency values at partial load, since regulators and end customers increasingly ask for them.

As a factory with 34 years of motor experience, a 29 mu production base and more than 30 staff, we handle OEM private-label production, ODM engineering for special voltage, frequency, mounting, brake or VFD needs, and sample motors for new projects. Mass production starts after sample performance is verified, small trial orders are accepted, and mixed ratings can be loaded into one container for export to Europe, America, Southeast Asia and the Middle East.

Product Overview

IE3Efficiency class
3,000 to 750 rpmSynchronous speed at 50 Hz
0.75 to 355 kWPower range
80 to 355Frame size

IE3 Industrial Induction Motor refers to an IE3 motor built on the squirrel-cage induction principle. Three-phase current in the stator creates a rotating field and induces current in the rotor bars, so torque is produced without brushes, slip rings or any rotor supply.

That simplicity is why induction motors dominate industry: few wearing parts, tolerance to dust and moisture in an IP55 enclosure, and bearings as the main maintenance item. Class F insulation and cast aluminium rotor bars support S1 continuous duty. IE3 efficiency comes from lower iron and copper losses than IE2 motors, which typically means around 15 to 20 percent less wasted energy and a cooler-running winding.

Starting is direct on line for most ratings, with a locked-rotor current of several times rated current; larger motors or weak supplies call for star-delta starters, soft starters or frequency drives.

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 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 IE3 Industrial 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.

Specification

Typical specification of the IE3 Industrial Induction Motor. Values are standard offers; ratings, voltage and options can be adjusted to your order.

ParameterStandard OfferCustomization Options
Product typeThree-phase asynchronous induction motor, squirrel-cage rotorODM design from your working conditions
Model seriesYE3 seriesPrivate-label model name on the nameplate
Efficiency classIE3 Premium Efficiency (IEC 60034-30-1)Efficiency test report with the shipment on request
Number of poles2, 4, 6 or 8Pole count selected per order
Synchronous speed at 50 Hz3,000 to 750 rpm (2 to 8 poles)Specify the pole count with the order
Rated speed at 50 Hz690 to 2,980 rpm depending on polesDepends on power rating and supply frequency
Power range0.75 to 355 kWOther ratings on request
Frame size80 to 355Special shaft or flange dimensions on request
Rated voltage380 V, 400 V or 415 V, three-phase220 V to 690 V and other voltages on request
Frequency50 Hz60 Hz winding and nameplate
Protection classIP55IP56 or IP65 on request
Insulation and temperature riseClass F insulation, Class B temperature riseClass H insulation and thermistors on request
Duty typeS1 continuousS2 to S8 on request after thermal check
Cooling methodIC411, totally enclosed fan-cooledIC416 separate fan for VFD operation
MountingB3, B5 and B35V1 and other mounting forms
Housing materialCast iron frame and end shields for most ratingsAluminium frame on small ratings on request
Ambient and altitudeMinus 15 to plus 40 degrees C, up to 1,000 mHigher altitude or temperature with derating
OptionsStandard motor without optionsBrake, encoder, space heater, explosion-proof, VFD-ready design
Certification and quality systemISO9001, China CCC, EU CEInspection and test documents on request
Nameplate, color and packagingStandard nameplate, standard color, export cartonOEM nameplate, RAL color, wooden case

Final values for a given rating are confirmed on the datasheet issued with your quotation.

Application

The IE3 Industrial 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
IndustryTypical EquipmentWhy It Fits
Conveying and material handlingBelt conveyors, feeders, screw conveyorsStandard IEC frame sizes fit common gearboxes and reducers
Mining and quarryingCrushers, screens, ventilation fansContinuous S1 duty and an IP55 enclosure handle dust and shock
Machine toolsGrinders, presses, hydraulic pump drivesCompact frames and steady torque for production machinery
TextileSpinning, weaving and dyeing machineryStable speed and low vibration support consistent output
Lifting and port machineryAuxiliary drives, winches, bulk handlingRobust housings and common mounting forms ease replacement
Target Customers
Machinery OEMsNeed a standard efficient motor that fits gearboxes, pumps and conveyors without redesign.
Maintenance and energy managersNeed replacement motors that cut energy cost on equipment that runs most of the year.
Distributors and wholesalersNeed popular ratings, consistent quality and clear documents for several markets.
EPC contractors and plant ownersNeed documented efficiency and certificates for tender files and energy audits.
Suitable and Unsuitable Uses
Suitable Uses
  • General industrial drives with moderate to long running hours
  • Machinery shipped to markets that require IE3
  • Replacement of IE1 or IE2 motors with a matching frame
Not Recommended
  • Very short-duty or rarely used equipment where purchase price decides
  • Explosive atmospheres unless an explosion-proof version is specified
  • Loads with special torque needs that have not been checked with our engineers
Selection Guidance
  • 1Define the load. Set required shaft power, starting torque and duty cycle before looking at models.
  • 2Choose the speed or type. Choose the pole count from the driven speed, then confirm frame and mounting. For frequent starts, check the thermal duty with us before ordering.
  • 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.
  • Grease bearings at the interval in the manual, and keep to the permitted number of starts per hour.
  • Fit overload and thermal protection, and respect the permitted number of starts per hour.

Advantages

Mass-volume ordersStandardized line operation across the YE3 series range keeps production steady and shortens lead time on repeat orders. Standard IE3 Industrial Induction Motor ratings are planned in batches, so a container of mixed ratings can usually be loaded from one production window. For importers and distributors, that means more predictable delivery dates and less stock-out risk.
OEM private labelWe manufacture finished motors to the nameplate and packaging requirements you supply, with your brand and rating data printed as agreed. Artwork is confirmed before production, so the first shipment of IE3 Industrial Induction Motor arrives ready for your channel without relabeling.
ODM developmentOur engineers work from your working-condition requirements and carry the project through design, prototyping, trial run and mass production. Special voltage, frequency, mounting dimension, explosion-proof, brake or VFD specifications stay in one project, which avoids mismatched parts from several suppliers.
Fast prototyping serviceSample motors are available for new projects, and mass production starts only after sample performance is verified. Testing a IE3 Industrial Induction Motor sample on your own equipment first removes the risk of a wrong specification in a full container.
Certified quality systemProduction runs under an ISO9001 quality-management system, and the range holds China CCC compulsory certification and EU CE certification. With these documents ready, importers face fewer compliance questions at customs and from their own customers.
34 years of motor experienceOur 29 mu production base and more than 30 staff have supplied motors across more than 20 Chinese provinces, and exports reach Europe, America, Southeast Asia and the Middle East. That export history means correct packing, documents and after-sales handling, which lowers delivery and warranty risk.
ItemDetail
SamplingSample motors for new projects, approved before mass production
CustomizationVoltage, frequency, mounting, brake, explosion-proof, VFD-ready design
Nameplate and packagingSupplied by customer artwork or standard export packing
DocumentsISO9001 system, China CCC, EU CE, test reports on request

Frequently Asked Questions

  • Q: Why are induction motors preferred in industry?
  • A: They have no brushes or slip rings, so there are fewer wearing parts and little routine maintenance beyond bearings. They also tolerate dust, moisture and long duty cycles.
  • Q: What starting methods can I use?
  • A: Direct on line suits most small and medium ratings. Star-delta, soft starter or frequency drive are used for larger motors or weak supplies to limit inrush current.
  • Q: How often do the bearings need greasing?
  • A: It depends on frame size, speed and duty, and the interval is stated in the manual supplied with the motor. Use the grease type specified and avoid over-greasing.
  • Q: What is the difference between IE2, IE3 and IE4 efficiency classes?
  • A: IEC 60034-30-1 ranks motors from IE1 to IE4, and each step up cuts losses, typically by about 15 to 20 percent. IE3 is Premium Efficiency and IE4 is Super Premium Efficiency.
  • Q: What information do you need to prepare a quotation?
  • A: Please send rated power, pole count or speed, voltage and frequency, mounting type (B3, B5 or B35), protection class, quantity and destination port. Nameplate and packaging requirements help us finalize the price faster.
  • Q: Can you produce the IE3 Industrial Induction Motor under my own brand?
  • A: Yes. We build finished motors to the nameplate, color and packaging requirements you provide. Send the artwork and rating data for confirmation, and we approve a sample before production begins.
  • Q: Can I get a sample of the IE3 Industrial Induction Motor before placing a bulk order?
  • A: Yes. Sample motors are available for new projects, and mass production starts only after sample performance has been verified on your side. Sample lead time depends on rating and customization, so please confirm it with our sales team.
  • Q: What is the minimum order quantity?
  • A: Single units can be supplied for sampling. For production orders, quantities are planned by model and rating, and mixed ratings can be combined in one container. Share your target volume and we will confirm the best loading plan.
  • Q: Which certificates come with your motors?
  • A: Production runs under an ISO9001 quality-management system, and the motors hold China CCC compulsory certification and EU CE certification. Test reports and nameplate data can be provided with each shipment on request.

Contact us to learn more

Tell us about your project and our sales engineers will recommend the right IE3 Industrial Induction Motor model, with a datasheet and quotation to match. New customers can start with a sample, and OEM or ODM requirements are welcome from the first message.

Please include in your inquiry
  • Rated power and pole count or speed
  • Voltage and frequency
  • Mounting type and shaft size
  • Protection class and ambient conditions
  • Quantity and destination port
  • Nameplate and packaging requirements
What you receive
  • A datasheet and quotation for your rating
  • A sample plan for new projects
  • Customization advice from our engineers
  • Certificate and test document information

Send your inquiry through the form on this page. Zhejiang Kuayue Motor supplies three-phase asynchronous motors and industrial pumps worldwide, backed by 34 years of motor manufacturing experience.

Manufacturing
Kuayue Motor in‑house manufacturing process, production lines & strict testing lab. Complete motor production from raw material to finished goods. Support OEM & ODM custom industrial motors. We run a modern 29‑mu production base with full‑link in‑house motor manufacturing. Most procedures are completed inside our plant, including silicon‑steel stamping, core processing, coil winding, frame precision machining, final assembly and factory performance test, without heavy reliance on external subcontractors.
Zhejiang Kuayue Motor Co., Ltd.
  • Capability
    We are equipped with standardized assembly lines, processing machinery and a professional testing laboratory, supported by experienced operators and engineering team. Benefiting from our complete manufacturing system, we can deliver mass‑volume standard‑series motors as well as undertake OEM / ODM custom projects. We keep stable control over product quality, lead‑time and production cost, supplying reliable industrial motors for global customers.
  • Supply‑Chain
    We select long-term and stable core raw-material suppliers with supplier access audit and annual re-evaluation. For key materials including silicon-steel sheets, enameled wire, bearings and explosion-proof accessories, reputable brands are applied to reduce failure risk from the source.
Flexible Manufacturing & Customization
We support both mass standardized production and small‑batch custom development.

1. Mass‑volume orders: Standardized line operation for high‑efficiency production and shortened lead‑time.
2. OEM private label: We manufacture finished motors according to customer‑provided nameplate & packaging requirements.
3. ODM development: Our engineers cooperate with clients on working‑condition requirements, completing design, prototyping, trial run and mass production for motors with special voltage, frequency, mounting dimension, explosion‑proof, brake or VFD specifications.
4. Fast prototyping service: Sample motors available for new projects; mass production starts only after sample performance verification.
Zhejiang Kuayue Motor Co., Ltd.
Zhejiang Kuayue Motor Co., Ltd.
Quality Philosophy
Quality is not about screening defective units at final inspection, but built within every manufacturing step. Following ISO9001 quality‑management system, we place quality control in raw‑material, machining and assembly procedures to minimize defective products, delivering stable and reliable small‑medium industrial motors to global customers.
Production Workflow
  • 1. Raw‑material incoming inspection
    Silicon steel sheet, enameled copper wire, cast‑iron frame, bearings and insulation materials are inspected on material property, dimension & appearance. Non‑qualified raw materials will be rejected.
  • 2. Iron‑core processing
    High‑speed stamping for silicon‑steel sheets, stacking & forming for stator and rotor cores.
  • 3. Winding production
    Enameled wire coil winding, coil inserting and insulation treatment with strict insulation‑process control.
  • 4. Frame precision machining
    CNC machining for cast‑iron frames & end covers to guarantee mounting‑dimension accuracy and interchangeability.
  • 5. Rotor assembly
    Rotor die‑casting and dynamic‑balance correction to minimize motor running vibration.
  • 6. Final assembly
    Assemble stator, rotor, end‑covers, bearings, terminal box, fan and other components. Special procedures for explosion‑proof, brake and VFD‑type special motors.
  • 7. Full‑item factory test
    Complete performance tests including insulation, voltage withstand, no‑load, temperature‑rise, noise and vibration.
  • 8. Painting & warehousing
    Qualified motors receive protective painting, nameplate marking, packaging and warehousing for shipment.
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