Thermal Performance, Air-To-Air Cooling System - ABB AMA Series Manual

Manual for Induction Motors and Generators
***Following chapter for cooling type: Air-to-air

8.1.3.2 Thermal performance, air-to-air cooling system

Experienced
malfunction
z
z
Low primary cooling
z
z
circuit performance
z
z
z
z
Low secondary cooling
z
z
circuit performance
z z
z
z
High intake air
z
z
temperature
z z
z
Overload
z
z
Overspeed
z
Network unbalance
z z
Faulty instrumentation or measurement system
z
Too many starts
z
Winding fault
96 - Trouble Shooting
Trouble shooting
Thermal performance
air-to-air cooling system
Possible cause
Damaged cooling fan(s)
Fan rotating in wrong direction Replace fan(s)
Dirty machine interior
Damaged external fan
Fan rotating in wrong direction Change shaft mounted fan or correct external blower motor operation
Leaking cooler
Ambient temperature too high Add ventilation to decrease ambient temperature
Exiting air is pulled back in
Heat source nearby
Control system setting
NOTE: For high bearing temperatures, see Table 8.1.2 Lubrication system and bearings.
Corrective action
Replace fan(s)
Clean machine parts and air gaps
Replace fan
Repair cooler
Ensure sufficient clear distances surrounding the cooler
Place heat sources further away, check ventilation
Check machine controls, eliminate overload
Check actual speed and ABB speed recommendations
Check that network balance fulfils requirements
Check measurements, sensors and wiring
Let the machine cool down before restarting
Check windings
3BFP 000 050 R0101 REV E