Product Highlights

Customizable Color: Color can be adjusted to satisfy individual customer requirements. Wide Power Range: Rated power reaches up to 25000kW to fit diverse industrial scenarios. Multiple Voltage Options: Compatible with 6kV, 6.6kV, 10kV, 11kV, 13.2kV and 13.8kV. Flexible Cooling Methods: Supports IC01, IC611 and IC81W cooling configurations with custom options. High Efficiency Design: Adopts low-loss silicon steel sheets and optimized electromagnetic design for energy conservation. Reliable Bearing System: Fitted with SKF bearings and non-stop oil filling and draining assemblies. Comprehensive Certifications: Complies with ISO9001, CCC and CE standards for global market access. Robust Insulation: F-class insulation with VPI treatment, delivering outstanding moisture resistance and impulse withstand capability.

Product Attributes

Product Description

Y, YKS, YQF, YKK, YR, YRKS, YRQF and YRKK series high voltage three-phase induction motors are products introduced and developed by our company since the 1980s, with more than 30 years of iteration history. Benefiting from continuous upgrades of insulation materials, application of low-loss silicon steel sheets, improved protection grades and optimized design schemes, the motors achieve reduced losses and higher power density. Drawing on over 60 years of experience in high voltage three-phase induction motor design and manufacturing, we have completed the latest round of optimization to meet domestic and industrial market demands.

Test results verify that this new product series reaches or approaches the world’s advanced level 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, winning consistent positive feedback from end users.

Manufactured with premium raw materials and mature production processes, this series features high efficiency, energy saving, low vibration, stable operation and convenient installation and maintenance.

Its power ratings, electrical characteristics, mounting dimensions and tolerances conform to GB755 Rotating Electrical Machines — Rating and Performance, IEC 60034-1 Rotating Electrical Machines — Rating and Performance and relevant machinery industry standards.

Five enclosure protection grades are available: IP23, IP44, IP54, IP55 and IP56, complying with GB4942.1 and IEC 60034-5. IP23 motors can be converted to IP44 (pipe ventilation type) or IPW24 (weather protected type). Custom protection grades can be provided upon request.

Three standard cooling methods are available per GB/T1993 and IEC 60034-6: IC01, IC611 and IC81W. Alternative cooling schemes can be customized according to customer requirements.

The standard construction and mounting form is IMB3 (horizontal foot-mounted), in line with GB997 and IEC 60034-7.

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

All technical data and overall installation dimensions of 10kV motors in this catalogue can be adapted for 3kV, 10.5kV and 11kV variants of the same frame size.

Application

This motor series is designed to drive a wide range of machinery including compressors, fans, water pumps, feeders and conveying equipment. It serves as the prime mover for mining, machinery, petrochemical, power plant and other industrial and mining facilities.

When ordering motors for equipment with large rotary inertia such as blowers, coal mills, rolling mills, crushers and belt conveyors, customers need to provide complete technical data and sign a technical agreement with us for targeted design to guarantee stable motor operation.

Standard Operating Conditions

• Altitude no more than 1000m above sea level
• Maximum ambient temperature ≤40℃; minimum ambient temperature: -15℃ for rolling bearing motors, 5℃ for sliding bearing motors and YKS/YRKS motors
• For YKS and YRKS air-water cooled motors: cooling water inlet temperature 5℃ ~ 33℃
• Monthly average maximum relative humidity ≤90% in humid months, with monthly average minimum temperature ≤25℃
• Power supply frequency: 50Hz±1%
• Operating voltage deviation within ±5% of rated voltage
• Duty: S1 continuous operation

Construction Description

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

The motor adopts the widely used box-type structure. Frame and end shields are steel plate welded with high rigidity and light weight. After removing the protective cover or cooler, internal inspection is accessible for easy installation and maintenance. The stator adopts external pressing structure. Stator windings use F-class insulation and anti-corona materials. Winding terminals are secured by special reliable binding techniques. The whole stator undergoes VPI vacuum pressure impregnation with solventless F-class varnish, ensuring superior insulation, moisture resistance and impulse withstand performance.

Most squirrel cage rotors are cast aluminum type with proven reliability and zero rotor bar breakage risk. Copper bar squirrel cage rotors adopt advanced, reliable welding and slot fixing processes. Wound rotors are fitted with F-class insulation and also treated by VPI impregnation.

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

Rolling bearing versions are equipped with non-stop oil filling and draining connections, allowing lubricant replenishment and discharge without shutdown.

The main terminal box is sealed with IP54 protection. It is normally mounted on the right side (viewed from the drive end), and can be switched to the left side on request. Cable entry direction can be adjusted to top, bottom, left or right. A separate grounding terminal is integrated inside the box.

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

Advanced computer simulation is applied to calculate temperature and stress distribution on squirrel cage rotors, preventing premature motor damage caused by overload during startup. Customers shall comply with the following requirements:

• The total inertia of driven equipment (converted to motor speed) shall not exceed the allowable load inertia value listed in technical datasheets
• The terminal voltage during startup shall not drop below 85% of rated voltage
• The load torque characteristic matches typical fan and pump load curves

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

If the load inertia exceeds the specified limit, frequent startup is required, or heavy-load startup is needed, please contact our engineering team for custom design confirmation to secure reliable startup performance.

Certifications

ISO9001, CCC, CE

Packaging & Shipping

Standard seaworthy export packing. Power range: 0.55kW ~ 20000kW Voltage range: 380V to 13.8kV Shaft height: 80mm-1120mm

Our Advantages

Wide power coverage Superior starting performance Suitable for all industrial sectors and global applications High reliability to cut downtime and operating costs Flexible customizable design Witness FAT (Factory Acceptance Test) available on-site or remotely online

Quality Control

In-process Inspection

All measuring instruments and gauges are calibrated annually.

Test Items

Every motor undergoes full testing before shipment and comes with an official test report after passing.

• Routine test: Winding DC resistance, insulation resistance to earth, 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, full-load slip, stator temperature rise, bearing temperature, hot insulation resistance, overload test, power factor, efficiency

After Sales Service

Warranty Terms

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