YKK 4005-4 TH Three-phase Asynchronous 6 Kv Motor 400kW 50Hz

Xi’an Simo Motor Co., Ltd. is one of the leading manufacturers and suppliers of YKK 4005-4 TH Three-phase Asynchronous 6 Kv Motor 400kW 50Hz 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 SIMO YKK4005-4 TH is a large-frame, squirrel-cage three-phase asynchronous motor built for continuous heavy-duty service in process plants and heavy industry. Rated 400 kW at 50 Hz with four poles and a full-load speed of 1485 r/min, it combines high starting torque with stable speed regulation, making it a dependable prime mover for compressors, pumps, fans and other high-inertia driven machines. The motor is designed, manufactured and tested by Xi'an Simo Motor Co., Ltd. in accordance with JB/T12730 and carries the CE mark.

Electrically, the machine is wound for a 6000 V three-phase supply in Y (star) connection and draws 48.1 A at full load. Efficiency reaches 93.0% at IE3 energy class and the power factor is held at 0.86, so the motor converts energy economically and keeps reactive demand low. Winding insulation is Class 155, which provides a wide thermal margin for sustained operation at rated load. As a true 6 kv motor, it often removes the need for a step-down transformer ahead of the drive, reducing capital cost and feed-circuit losses at the same time.

Heat is removed by an IC611 cooling arrangement: an integrated air-water cooler circulates cooling air through the machine and rejects the heat to the water circuit, so the winding stays within its thermal class even under continuous load. The caution plate requires circulating cooling water to be admitted through the cooler before the motor is started. The enclosure is rated IP55, protecting the internals from dust and water jets in dusty, humid or coastal plant rooms, while the layout keeps inspection and bearing maintenance straightforward.

Mechanically, the motor is foot-mounted to IM B3 with a NU224ECM cylindrical roller bearing at the drive end to accept radial coupling loads and a 6224/C3 deep-groove ball bearing at the non-drive end for axial location. Total weight is 2760 kg. The rigid frame resists vibration when the rotor is coupled to heavy driven equipment, and the shaft centreline must be carefully aligned with the driven machine through the coupling. Duty is rated S1 for uninterrupted running, and operation with the winding earthed is not permitted - a point worth noting during commissioning.

Starting conditions deserve attention on site. When reduced-voltage starting is used with a heavy load, the available starting torque falls with the square of the applied voltage, so starting time lengthens and the winding may overheat; direct-on-line starting, a soft starter or a variable-frequency drive should therefore be chosen against the actual load curve. Rotation direction should be checked against the indication plate before the first run.

Efficiency pays back over a long service life. At 93.0% on continuous S1 duty, a 400 kW machine of this class dissipates far less heat than older lower-efficiency equivalents, and the electricity saved usually exceeds the price premium within the first years of operation. Together with the medium-voltage feed, operators also benefit from lower cable currents, smaller switchgear and simpler protection coordination.

Environmentally, the unit is rated for ambient temperatures from -15 °C to 40 °C and site altitudes up to 1000 m, covering most inland and coastal industrial sites without derating. Space heaters, winding temperature detectors, higher-altitude or wider-temperature versions, and alternative mounting arrangements are available on request.

Typical applications include air and gas compressors, centrifugal pumps, induced and forced draught fans, blowers, mixers and grinding mills in cement, mining, metallurgy, water treatment and power generation - duties where a robust 6 kv motor with predictable efficiency and long service intervals is preferred over lower-voltage alternatives.

Every unit is routine-tested before dispatch. For quotations, outline drawings, test certificates or spare-parts support, contact Xi'an Simo Motor Co., Ltd. at 400 029 1177; each 6 kv motor can be configured with the required cooling, protection and mounting options prior to shipment.

Main Technical Parameters

Production Details

Frame

• Box structure frame, easy for maintaining and installation

• Flexible dimensions

• Customizable outlook

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Stator

• 99.9% pure copper winding ensures 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

• Pprecisely machined shafts with good capacity of  toughness

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Testing

• All motors must pass the testing before painting and packaging

• We regularly test existing and new products to ensure quality.

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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

YKK  Motor is the widely used in many general industries, such as blowers, pumps, crushers, cutting machines, and many other heavy machines. For more application details, contact us.

Cement

Power Station

Water conservation

Steel

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