Product Highlights

Customizable Color: The paint color can be adjusted to match specific project requirements. High Efficiency Design: Adopts low-loss silicon steel sheets and premium insulation materials to cut energy consumption and boost output capacity. Robust Construction: Steel plate welded frame and end cover deliver high rigidity, low weight and stable long-term operation. Advanced Insulation: Stator winding applies Class F insulation and VPI treatment, featuring outstanding moisture resistance and impulse voltage withstand capability. Flexible Mounting: Standard IMB3 horizontal foot-mounted design; the terminal box orientation can be adjusted as requested. Wide Power Coverage: Rated power up to 25,000kW, with optional voltages ranging from 6kV to 13.8kV. Global Compliance: Conforms to ISO9001, CCC, CE, GB755 and IEC34-1 standards. Dependable Bearings: Fitted with SKF bearings. Rolling bearing version supports online oil filling and draining without shutdown.

Product Attributes

Product Description

Y, YKS, YQF, YKK, YR, YRKS, YRQF and YRKK series high voltage three-phase induction motors are developed and introduced by our company since the 1980s, with more than 30 years of iteration history. Supported by continuous upgrades of insulation materials, adoption of low-loss silicon steel sheets, upgraded insulation grades and optimized electromagnetic design, these motors achieve reduced losses and higher power density. Drawing on our 60-year experience in high voltage induction motor design and manufacturing, we have completed the latest round of optimization to satisfy domestic and industrial market demands. Verified by type tests, the new series reaches or approaches world-class standards in both technical and economic performance. Mass production has been realized, and products are exported to more than 20 countries and regions including Europe, America, Africa, Hong Kong and Macao, as well as widely supplied across mainland China, earning consistent positive feedback from end users.

Manufactured with premium raw materials and mature production processes, this motor series stands out for high efficiency, energy saving, low vibration, stable operation and easy installation & maintenance.

Its power ratings, electrical characteristics, mounting dimensions and tolerances comply with GB755 Rotating Electrical Machines – Ratings and Performance, IEC34-1 Rotating Electrical Machines – Ratings and Performance and relevant machinery industry standards.

Five enclosure protection grades are available per GB4942.1 and IEC34-5: IP23, IP44, IP54, IP55 and IP56. IP23 motors can be modified into IP44 (pipe ventilation type) or IPW24 (weather protected type). Custom protection grades can be supplied upon request.

Three cooling configurations are offered following GB/T1993 and IEC34-6: IC01, IC611 and IC81W. Alternative cooling modes are available for special orders.

The standard construction and mounting form is IMB3 (horizontal foot-mounted), complying with GB997 and IEC 34-7 for rotating machine construction and mounting code.

Based on rotor type, protection grade and cooling method, the full range is divided into eight sub-series as shown below:

All dimension variants of 10kV motors listed in the technical datasheet can be adapted for 3kV, 10.5kV and 11kV versions.

Application

This motor series is designed to drive various equipment such as compressors, fans, water pumps, conveyors and other mechanical units. It serves as the prime mover for mines, machinery plants, petrochemical facilities, power stations and other industrial and mining sites.

For heavy inertia loads including blowers, coal mills, rolling mills, crushers and belt conveyors, customers shall submit complete technical data and sign a technical agreement with us before order placement. This customizes the motor design and guarantees reliable operation.

Normal Operating Conditions

• Altitude ≤1000m above sea level
• Maximum ambient temperature ≤40℃; minimum ambient temperature: -15℃ for rolling bearing motors, 5℃ for sliding bearing motors. YKS and YRKS minimum ambient temperature is 5℃
• For YKS and YRKS: cooling water inlet temperature ranges from 5℃ to 33℃ maximum
• Monthly average maximum relative humidity ≤90% in humid months, meanwhile monthly average minimum temperature ≤25℃
• Power frequency: 50Hz ±1%
• Operating voltage deviation within ±5% of rated voltage
• Duty: S1 continuous operation

Construction Description

Y and YR are the base series with IP23 protection and IC01 cooling. Derivative models cover different protection and cooling schemes, including YKS (air-water cooling), YQF (weather protected), YKK (air-air cooling), YRKS, YRQF and YRKK.

The motor adopts the widely accepted box-type structure. Frame and end cover are fabricated by steel plate welding, featuring high rigidity and light weight. After removing the protective cover or cooler, internal inspection and access are convenient for installation and routine maintenance.

The stator adopts external press-fit structure. Stator windings use Class F insulation and anti-corona materials. Winding terminals are fixed with specialized reliable binding technology. The whole stator undergoes VPI vacuum pressure impregnation with solventless Class F varnish, delivering stable insulation performance, excellent moisture resistance and impulse withstand capacity.

Most squirrel cage rotors are cast aluminum type with proven low failure rate for stable service. Copper bar squirrel cage rotors adopt advanced reliable welding and slot fixation technology. Wound rotors use Class F insulation and also receive VPI treatment.

Two bearing types are available: rolling bearing and sliding bearing, selected according to motor power and speed. Base bearing protection grade is IP44; bearing protection will be upgraded together with higher motor enclosure grade.

Rolling bearing version is equipped with online oil filling and draining fittings, allowing grease replenishment and discharge without equipment shutdown.

The main terminal box is sealed at IP54. It is fitted on the right side viewed from the drive end, and can be rearranged to the left side on request. Cable entry direction can be adjusted to top, bottom, left or right. Independent grounding terminal is integrated inside the box.

Starting Guidance for Y, YKS, YQF, YKK Induction Motors

Finite element simulation is applied to calculate temperature and stress distribution of squirrel cage rotors, preventing premature damage caused by overload during startup. Please comply with the following requirements:

• The total inertia of driven machinery (converted to motor speed) shall not exceed the allowable load inertia listed in technical sheets
• Terminal voltage shall remain no less than 85% of rated voltage during starting
• The load torque characteristic matches typical fan or pump curve

Under above conditions, the motor allows two successive cold starts or one hot start, with natural coast-down interval between starts. Additional restart is permitted only after one hour cooling.

Contact our engineering team for custom design if driven inertia exceeds datasheet limits, frequent startup is required or heavy-load starting is needed.

Certifications

Yks Series 4p IC81W 4000kw Hv Electric Motor (Frame 630) 6.6kv

Packaging & Shipping

Yks Series 4p IC81W 4000kw Hv Electric Motor (Frame 630) 6.6kv Power range: 0.55KW ~20,000KW Voltage range: 380V to 13.8KV Shaft height: 80mm-1120mm

Our Advantages

• Broad power coverage to match diverse demands
• Superior starting performance
• Suitable for multiple industries and global supply projects
• High reliability to cut downtime and operating costs
• Flexible custom design support
• Witness FAT test available on-site or remotely online

Quality Control

In-process Inspection

All measuring instruments are calibrated annually.

Test Items

Every motor undergoes full inspection before shipment and comes with an official test report upon passing.

• Routine test: Winding DC resistance, winding insulation resistance, high voltage withstand test, no-load current, no-load power, no-load loss, three-phase current unbalance, locked rotor current, locked rotor torque, maximum torque, rotation direction, vibration (horizontal, vertical, axial), noise
• Type test: Full load input power, full load current, stator loss, rotor loss, iron loss, mechanical loss, stray loss, slip ratio, stator temperature rise, bearing temperature, hot insulation resistance, overload test, full load power factor, efficiency

Yks Series 4p IC81W 4000kw Hv Electric Motor (Frame 630) 6.6kv Yks Series 4p IC81W 4000kw Hv Electric Motor (Frame 630) 6.6kv Yks Series 4p IC81W 4000kw Hv Electric Motor (Frame 630) 6.6kv

After Sales Service

Warranty Terms

Standard warranty: 12 months from commissioning date or 18 months after delivery, whichever comes first. Extended warranty solution is available upon inquiry.