YR 355L1-8 Three-phase Asynchronous 220 Kw Electric Motor 380V

AIMIN ELECTRICS CO., LTD. is one of the leading manufacturers and suppliers of yr 355l1-8 three-phase asynchronous 220 kw electric motor 380v in China. With abundant experience, we are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk premium products made in China here and get quotation from our factory.

Brief Introduction

The AIMIN YR series represents a premium line of wound-rotor (slip-ring) three-phase asynchronous motors designed for the most demanding industrial drive applications. Built on decades of motor manufacturing expertise, each unit is engineered to deliver exceptional starting performance, reliable continuous operation, and long service life under harsh operating conditions. The flagship model in this series, a 220 kw electric motor (Type YR355L1-8), exemplifies the robust design and precise engineering that define the entire YR product range. With a rated voltage of 380V at 50Hz, Class 155 (F) insulation, and IP23 enclosure protection, these motors meet international quality standards and are manufactured in compliance with JB/T 5269 specifications, making them a trusted choice for heavy industries worldwide.

At the heart of the YR series is its wound-rotor configuration, which sets it apart from standard squirrel-cage motors. The rotor winding terminals are connected to external starting resistors through slip rings and carbon brushes, allowing precise control over the motor's starting characteristics. This design delivers significantly higher starting torque while simultaneously reducing inrush current-a critical advantage when driving high-inertia loads or operating on weak power networks. Users can adjust the external resistance in steps to tailor acceleration profiles, minimize mechanical stress on driven equipment, and achieve smoother starts. For applications requiring speed regulation, the wound-rotor topology also enables efficient variable-speed operation, providing flexibility that conventional induction motors cannot match. The rotor itself is constructed from high-quality electrical steel laminations with precision-balanced windings, ensuring minimal vibration and quiet operation even at full load.

The mechanical construction of the YR series reflects AIMIN's commitment to durability. The cast iron frame provides superior rigidity and vibration damping, while generously sized antifriction bearings support both radial and axial loads over extended service intervals. Internal cooling is achieved through a shaft-driven fan that directs airflow along optimized cooling paths, maintaining stable operating temperatures during continuous S1 duty. The terminal box is generously proportioned for easy cable connection, and the slip-ring compartment is designed for straightforward inspection and brush replacement, reducing maintenance downtime. Every motor undergoes rigorous factory testing-including no-load, locked-rotor, insulation resistance, and high-voltage withstand tests-before shipment, guaranteeing out-of-the-box reliability.

YR series motors find wide application across industries where heavy loads and challenging starting conditions prevail. They are commonly deployed to drive crushers, ball mills, rod mills, and grinding equipment in mining and mineral processing; hoists, winches, and conveyors in material handling; compressors, pumps, and fans in petrochemical and power generation; and rolling mills and extruders in metallurgical plants. The 220 kw electric motor variant, in particular, has proven itself as a versatile workhorse for sugar mills, cement plants, and steelworks throughout Southeast Asia and beyond, where grid stability and load diversity make wound-rotor technology the preferred solution.

Beyond standard specifications, AIMIN offers extensive customization to meet specific project requirements. Options include different voltage ratings (up to 10kV for high-voltage frames), alternative enclosure ratings up to IP55, tropicalized insulation for humid climates, space heaters for condensation prevention, and various mounting configurations (foot-mounted, flange-mounted, or combined). For export markets such as Thailand, Indonesia, and Vietnam, motors can be supplied with full English documentation, nameplates, and compliance certificates tailored to local electrical standards.

When you select a AIMIN YR series motor, you are choosing more than a product-you are investing in proven performance, dependable quality, and comprehensive after-sales support. Backed by AIMIN's nationwide and growing international service network, every 220 kw electric motor and every unit across the YR range comes with technical consultation, spare parts availability, and responsive field service. From initial selection through years of continuous operation, AIMIN stands beside its customers, delivering the power and reliability their operations depend on.

Main Technical Parameters

Production Details

Frame

• Box structure frame, easy for maintaining and installation

• Flexible for special installation dimensions

• Customizable outlook and dimensions

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Stator

• 99.9% pure copper winding for stator to ensure the output power and efficiency

• Excellent insulation system with 5 more processing flows

• All the windings are fitted in by handwork to ensure all slots are full and avoid any possible winding flaw.

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Rotor

• Aluminum casting rotor with high quality silicon steel rotor core to assure induction efficiency

• Copper bar rotor is available for YKK motor

• Well and precisely machined shafts with good capacity of strength and toughness

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Testing

• All motors must pass the piece testing before painting and packaging

• Type tests will be regularly performed for each series, more often for new developed series and variants.

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Package and delivery

• All motors will be packaged well before delivery

• Plastic cover inside, vacuum tin foil outer and then solid wood box

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Applications

Cement

Power Station

Water

Mining

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