ABB
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ABB/ BU Machines / HV Induction motors IEC catalogue / Engineered motors EN 12-2007
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IC 411 / IP55 HXR motor
The HXR motor has an external shaft mounted fan
that use the surrounding air for cooling. The motor is
protected against dust and water jets. The principle of
this motor is shown in below:
Sectional drawing of IC 411 / IP55 motor.
Protection definition IP55
In a dust-protected motor, some dust can ingress the
motor but it does not enter in sufficient quantity to
interfere with the motor's operation.
The motor protected against water jets:
Water projected by a nozzle against the motor from any
direction shall have no harmful effect.
Method of Cooling (IC 411)
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 the 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.
IC 31 / IP 55
This version is fitted with an inlet and outlet pipe to use
remote cooling air. Essentially this is the AMA-motor
frame without any upper cover. The motor is protected
against dust and splashing water from any direction.