Product Highlights

Customizable Color: Color can be adjusted to match individual project requirements. Wide Power Coverage: Power options span from 0.55KW up to 25000KW to suit diverse industrial working conditions. Multiple Voltage Ratings: Compatible with 6kV, 6.6kV, 10kV, 11kV, 13.2kV and 13.8kV power supply systems. High-Efficiency Construction: Adopts low-loss silicon steel sheets and optimized electromagnetic design for outstanding energy savings. Superior Insulation System: F-class insulation combined with VPI vacuum pressure impregnation treatment delivers excellent moisture resistance and impulse voltage withstand capability. Flexible Mounting Option: IMB3 horizontal foot-mounted configuration complying with GB997 and IEC 34-7 standards. Global Qualified Certifications: Approved with ISO9001, CCC and CE to satisfy international market compliance requirements. Dependable Bearing Assembly: Fitted with SKF bearings and on-line oil filling & draining structure without equipment shutdown.

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Product Attributes

Product Description

Y, YKS, YQF, YKK, YR, YRKS, YRQF and YRKK series high voltage three-phase induction motors are optimized products developed and localized by our company since the 1980s, with more than 30 years of iterative upgrade history. Benefiting from continuous improvements in insulation materials, adoption of low-loss silicon steel sheets, upgraded insulation grades and electromagnetic optimization, these motors cut core and copper losses effectively while boosting power density. Drawing on over 60 years of high voltage induction motor R&D and manufacturing experience, we have reworked the whole series design to align with domestic and global industry demands. Type tests verify that the updated product range reaches or approaches world-class levels in both technical and economic performance. Mass production has been realized, with products exported to over 20 countries and regions including Europe, America, Africa, Hong Kong and Macao, as well as widely supplied across mainland China, winning consistent recognition from end users.

Manufactured with premium raw materials and precise fabrication processes, this motor series features high efficiency, low vibration, stable operation and easy installation & maintenance. Its power ratings, electrical characteristics, mounting dimensions and tolerances conform to GB755 (Rotating electrical machines – Ratings and performance), IEC 34-1 and relevant machinery industry standards.

Five enclosure protection classes are available: IP23, IP44, IP54, IP55 and IP56, complying with GB4942.1 and IEC34-5. IP23 units can be converted to IP44 (pipe ventilation) or IPW24 (weather-protected type). Custom protection classes are available upon request.

Three standard cooling modes are offered per GB/T1993 and IEC34-6: IC01, IC611 and IC81W. Alternative cooling solutions can be supplied for special requirements.

The standard construction and mounting arrangement is IMB3 (horizontal foot-mounted), following GB997 and IEC 34-7 mounting code rules.

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

All 10kV motor dimension data listed in this catalogue can be adapted for 3kV, 10.5kV and 11kV variants with matched frame sizes.

Application

This motor series drives general equipment such as compressors, fans, water pumps, feeders and conveyors, serving as prime movers for mines, machinery plants, petrochemical facilities and power stations. For heavy inertia loads including blowers, coal mills, rolling mills, crushers and belt conveyors, customers must submit complete technical data and sign a technical agreement with us for customized design to guarantee reliable operation.

Standard Operating Conditions

• Installation altitude ≤1000m above sea level
• Maximum ambient temperature ≤40℃; minimum ambient temperature: -15℃ for rolling bearing motors, 5℃ for sliding bearing motors; YKS & YRKS minimum ambient temperature 5℃
• For YKS / YRKS: cooling water inlet temperature 5℃ ~ 33℃
• Monthly average maximum relative humidity ≤90% with monthly average minimum temperature ≤25℃ in humid months
• Power frequency: 50Hz ±1%
• Supply voltage fluctuation 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 air-water cooled YKS, weather-protected YQF, air-air cooled YKK plus YRKS, YRQF and YRKK wound rotor versions.

The motor adopts a widely used box-type welded steel frame and end shield, featuring high rigidity and lightweight structure. After removing the cooler or protective cover, internal components are accessible for convenient inspection, installation and maintenance. The stator uses external pressing structure. Stator windings use F-class insulation and anti-corona materials with reliable special binding for terminal fixing. The whole stator undergoes VPI vacuum pressure impregnation with solventless F-class varnish, achieving robust insulation, moisture resistance and impulse withstand capability.

Most squirrel cage rotors adopt die-cast aluminum design for fracture-free and stable running. Copper bar squirrel cage rotors apply advanced slot welding and locking technology. Wound rotors also use F-class insulation and full 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 will be upgraded together with higher motor enclosure protection. Rolling bearing versions are equipped with on-line oil filling and draining ports, enabling lubrication maintenance without shutdown.

The main terminal box is sealed (IP54), normally fitted on the non-drive side (viewed from shaft extension), and can be relocated to the opposite side as requested. Cable entry direction can be adjusted to top, bottom, left or right, with independent grounding terminal inside the box.

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

Squirrel cage rotor thermal and pressure distribution is calculated via computer simulation to prevent premature failure under starting overload. Customers need to comply with the following requirements:

• The total inertia of driven equipment (converted to motor speed) shall not exceed the allowable load inertia listed in technical datasheet
• Terminal voltage shall remain no less than 85% of rated voltage during startup
• Load torque characteristic matches typical fan / pump resistance curve

When above conditions are satisfied, the motor allows two consecutive cold starts or one hot start, with natural coast-down interval between attempts. Additional restart attempts require a minimum waiting time of 1 hour. Contact our engineering team for custom design if load inertia exceeds the limit, frequent starting is required or heavy-load startup is needed.

Certifications

High Voltage Squirrel Cage Induction Motor YKS800-4TH 7800KW IC81W

Packaging & Shipping

High Voltage Squirrel Cage Induction Motor YKS800-4TH 7800KW IC81W Power range: 0.55KW ~20,000KW Voltage range: 380V to 13.8KV Shaft height: 80mm–1120mm

Our Advantages

Broad power spectrum for selection Excellent starting performance Suitable for all mainstream industrial sectors worldwide High reliability to cut downtime and operating cost Customizable design for special project demands Witnessed FAT (Factory Acceptance Test) available on-site or remotely

Quality Control

In-process Inspection

All measuring instruments are calibrated annually.

Test Items

Every motor must complete factory testing before delivery and comes with an official test report upon passing.

• Routine test: Winding DC resistance, insulation resistance, high voltage withstand, no-load current / power / loss, no-load current unbalance, locked rotor current & torque, maximum torque, rotation direction, vibration (horizontal / vertical / axial), noise
• Type test: Full-load input power & current, stator loss, rotor loss, iron loss, mechanical loss, stray loss, 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 date or 18 months after shipment, whichever comes first. Extended warranty solution is available upon inquiry.