ABB
ABB/ BU Machines / HV Induction motors IEC catalogue / Engineered motors EN 12-2007
53
2
Enclosure and Cooling
Standard combinations used for AMA-motors are:
IC 01 / IP 24W
This weather-protected motor has a shaft-mounted
cooling fan located inside the housing. The design of the
motor reduces the ingress of rain, snow and airborne
particles into the electrical parts. On the air intake path
this is achieved by ensuring that the average velocity
does not exceed 3 m/s, allowing any heavier particles to
settle. The design of air intake path includes three acute
changes in excess of 90 degrees to further reduce the
flow rate to the optimum level. The motor is protected
against splashing water from any direction.
IC 611 / IP 55
In this design the fully enclosed motor has an air-
to-air heat exchanger mounted on the motor. Shaft
mounted fans are fitted both inside and outside of the
casing to supply the inside and outside cooling circuits
respectively. The motor is protected against dust and
splashing water from any direction.
IC 81W / IP 55
This fully enclosed motor is fitted with an air-to-water
heat exchanger. A shaft mounted fan is fitted inside the
casing to supply the internal cooling circuit. Motor is
protected against dust and splashing water from any
direction.
The terminal boxes have a protection of at least IP 55.