Product Highlights

High Efficiency & Energy Saving: It adopts low-loss silicon steel sheets and optimized electromagnetic design to cut losses and boost power density. Customizable Voltage & Power: Rated power up to 25000kW; available voltages include 6kV, 6.6kV, 10kV, 11kV, 13.2kV and 13.8kV. Reliable Insulation & Cooling: F-class insulation with VPI vacuum pressure impregnation treatment; cooling options: IC01, IC611, IC81W. Global Standard Certification: ISO9001, CCC and CE certified; compliant with IEC 60034-1 and GB 755. Flexible Mounting & Protection: Protection grades from IP23 to IP56; standard mounting IMB3; custom color and rotation direction supported. Wide Proven Industrial Use: Suitable for compressors, fans, pumps and mining equipment, supplied to over 20 countries and regions. Heavy-Duty Bearing Assembly: Fitted with SKF bearings, equipped with on-line oil filling and draining device without shutdown. Strict Quality Assurance: 100% factory inspection including routine tests and type tests; backed by more than 70 years of manufacturing experience.

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Product Attributes

Product Description

Y, YKS, YQF, YKK, YR, YRKS, YRQF and YRKK series high voltage three-phase induction motors were introduced and independently developed by our factory back in the 1980s, with decades of iterative upgrade history. With continuous improvements in insulation materials, adoption of low-loss silicon steel sheets, upgrade of technical grades and optimized electromagnetic design, all loss components of the motor are reduced and power capacity is improved. Drawing on over 60 years of experience in high voltage induction motor design and manufacturing, we have carried out the latest round of optimization to match domestic and global industrial requirements. Test results show that the new series reaches or approaches the world advanced level in both technical performance and economic efficiency. These motors are mass-produced and exported to more than 20 countries and regions across Europe, America, Africa and other areas, as well as widely used all over China, winning consistent recognition from end users. Manufactured with premium raw materials and mature production processes, this series features high efficiency, low vibration, stable operation and easy installation & maintenance. Its power ratings, electrical characteristics, mounting dimensions and tolerances conform to GB 755, IEC 60034-1 and relevant machinery industry standards. According to GB 4942.1 and IEC 60034-5, enclosure protection grades cover IP23, IP44, IP54, IP55 and IP56. IP23 motors can be modified to IP44 (pipe ventilation type) or IPW24 (weather protected type). Other custom protection grades are available upon request. Cooling methods comply with GB/T 1993 and IEC 60034-6, including IC01, IC611 and IC81W. Extra cooling solutions can be customized for special demands. The standard construction and mounting arrangement is IMB3 (horizontal foot-mounted), complying with GB 997 and IEC 60034-7.

The series is divided into 8 sub-models based on rotor structure, protection grade and cooling method:

The technical data and installation dimensions of 10kV motors can be adapted for 3kV, 10.5kV and 11kV variants of the same frame size.

Application

This high voltage induction motor is designed to drive compressors, fans, water pumps, scrapers, conveyors and other general machinery, widely used as prime movers in mines, machinery plants, petrochemical facilities and power stations. For heavy inertia loads such as blowers, coal mills, rolling mills, crushers and belt conveyors, customers shall provide complete technical parameters and sign a technical agreement with us before order placement, to guarantee reliable motor operation.

Normal Operating Conditions

• Altitude: ≤1000m above sea level
• Maximum ambient temperature: ≤40°C; minimum ambient temperature: -15°C for rolling bearing motors, 5°C for sliding bearing motors; YKS / YRKS minimum ambient temperature: 5°C
• For YKS & YRKS: cooling water inlet temperature 5°C ~ 33°C
• Average monthly relative humidity ≤90% while average monthly lowest temperature ≤25°C in humid season
• Power 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 types include YKS (air-water cooled), YQF (weather protected), YKK (air-air cooled), YRKS, YRQF and YRKK. The motor adopts a modular box-type frame popular worldwide. Frame and end shields are steel plate welded for high rigidity and light weight. After removing the cooler or protective cover, internal inspection and maintenance can be performed conveniently. The stator adopts external core pressing structure. Stator windings use F-class insulation and corona-resistant materials, with reliable special binding for winding terminals. The whole stator undergoes VPI vacuum pressure impregnation with F-class solventless varnish for superior insulation, moisture resistance and dielectric strength. Most squirrel-cage rotors are cast aluminum type with proven anti-crack performance for stable running. Copper bar squirrel-cage rotors use advanced reliable brazing and slot fastening technology. Wound rotors are also F-class insulated and treated by VPI. Two bearing configurations 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 for higher enclosure requirements. Rolling bearing version is fitted with on-line oil filling and draining system, allowing lubrication service without shutdown. The main terminal box is sealed with IP54 protection. It is normally mounted on the right side (viewed from shaft extension), and can be switched to the left side as requested. Cable entry direction can be adjusted to top, bottom, left or right. Separate earthing terminal is equipped inside the box.

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

Finite element thermal and stress simulation is applied for squirrel cage rotors to avoid premature damage under starting overload. Customers shall comply with below requirements:

• The inertia of driven equipment (converted to motor speed) shall not exceed the allowable load J value listed in technical datasheet
• Terminal voltage during starting shall be no less than 85% of rated voltage
• Load torque characteristic matches typical fan or pump curve

Within above limits, the motor allows two successive cold starts or one hot start, with natural coast-down interval between attempts. Further restart is permitted after one hour cooling. Contact our engineering team for custom design if the load inertia exceeds the limit, frequent starting is required or heavy-load start is needed.

Certifications

ISO9001, CCC, CE Compliant with IEC 60034-1, GB 755

Packaging & Shipping

Model: IC81W Three Phase Asynchronous High Voltage Motor YKS710D 4P 7000KW 6KV Standard seaworthy export packing.

Power Range: 0.55kW ~ 20000kW Voltage Range: 380V ~ 13.8kV Shaft Height: 80mm ~ 1120mm

Our Advantages

Wide power and voltage coverage Excellent starting performance Suitable for full industrial sectors for global supply High reliability to cut downtime and operating cost Customized design available Witness FAT test on-site or online

Quality Control

All measuring instruments are calibrated annually.

Test Items

Every motor is fully tested before delivery and supplied with official test report. Routine Test Items

• Three-phase DC resistance of winding
• Winding insulation resistance to earth
• Winding high voltage withstand test
• No-load current
• No-load power and loss
• Three-phase no-load current unbalance
• Locked rotor current
• Locked rotor torque
• Maximum torque
• Rotation direction
• Vibration (horizontal, vertical, axial)
• Noise

Type Test Items

• Full load input power
• Full load current
• Stator winding loss
• Rotor winding loss
• Iron loss
• Mechanical loss
• Stray loss
• Full load slip
• Stator winding temperature rise
• Bearing temperature
• Hot insulation resistance
• Overload test
• Full load power factor
• Efficiency

After Sales Service

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