Basic Information

Product Description

Rib Cooled Motors, Type AXR

The latest generation of multipurpose rib cooled motors offers high power density, easy configurability, and built-in serviceability. They incorporate experience gained over years of manufacturing electric motors.

These motors set a benchmark for the industry, offering more watts per kilogram than has ever been achieved before with rib cooled motors. High power density means that for a given output, you can often use a motor one frame size smaller than with conventional products. This helps to save space and enables more compact installations.

• Compliance: AXR motors comply with main industry standards such as API 541 and Shell DEP, as well as customer specifications.
• Construction: AXR motors have a rugged cast iron frame.
• Standard Configuration: They are rib cooled motors with IC411 cooling and IP55 protection as standard.
• Optional Configuration: The motors are also available with IC416 cooling and optional IP66 protection. Their IP66 protection has been verified by a leading independent testing organization.
• Range: AXR motors cover the output range up to 1,800 kW, and they are available in shaft heights from 315 to 500 mm. The motors can be mounted horizontally and vertically. For AXR motors, this catalog shows the technical data at 50 Hz and 60 Hz, and for synchronous speeds from 500 to 3600 rpm.

Mounting Arrangements

Standard mounting arrangements for AXR motors include:

• Code I: IM B3 (Code II: IM 1001)
  Standard floor mounting, feet facing downwards (horizontal foot mounted).
• Code I: IM V1 (Code II: IM 4011)
  Flange and free shaft end facing downwards (vertical solid shaft, flange mounted).
• Code I: IM B35 (Code II: IM 2001)
  Foot-and-flange-mounted horizontal with the flange part of the end-shield, one cylindrical shaft extension, and feet facing downwards.

Enclosure and Cooling

Standard Combinations: IC411 / IP55 & IC416 / IP55

IC411 / IP55
AXR motors have an external shaft-mounted fan that uses the surrounding air for cooling. The motors are protected against dust and water jets.

IC416 / IP55
AXR motors are available with IC416 cooling. An additional motor drives the cooling fan to produce the cooling required for low-speed applications, especially in cases where the motor is fed via a variable speed drive.

Protection Ratings

Protection Rating IP55

• Protection against dust: As in other dust-protected motors, some dust can enter but not in sufficient quantities to interfere with the motor's operation.
• Protection against water jets: Water projected by a nozzle against the motor from any direction has no harmful effect.
• Protection Rating IP66
  AXR motors are available with protection ratings up to IP66.
• Protection against dust: The enclosure is completely dust-tight.
• Protection against water jets: Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction has no harmful effect.

Cooling Method (IC411)

• Frame Surface Cooled: The primary coolant is circulated in a closed circuit in the motor and gives its heat through the external surface of the motor (in addition to the heat transfer via the stator core and other heat-conducting parts) to the final coolant, which is the surrounding medium. The surface may be plain or ribbed, with or without an outer shell to improve heat transfer.
• Self Circulation: The coolant is moved dependent on the rotational speed of the main motor either by action of the rotor alone or by means of a component designed for this purpose and mounted directly on the rotor of the main motor, or by a fan or pump unit mechanically driven by the rotor or the main motor.

Packaging

• Standard seaworthy package for export.
• Plywood package or wooden fumigation package.
• Suitable for long-distance transportation by sea or land.

Warranty Period

• Standard Warranty: 12 months after commissioning, or 18 months after delivery, whichever comes first.
• Extended Warranty: If you would like to extend the warranty period, it is allowed; please contact us for more details.