Manual for Induction Motors and Generators
Trouble Shooting - 95
3BFP 000 050 R0101 REV E
8.1.3 Thermal performance
***Following chapter for cooling type: Open air or ducted air
8.1.3.1 Thermal performance, open air cooling system
NOTE: For high bearing temperatures, see Table 8.1.2 Lubrication system and bearings.
Trouble shooting
Thermal performance
open air cooling system
High winding temperature
High cooling air temperature
z
z Ambient temperature too high Add ventilation to decrease ambient temperature
z
z
Exiting air is pulled back in
Ensure sufficient clear distances surrounding the machine
zz Heat source nearby Place heat sources further away, check ventilation
zz Dirty machine interior Clean machine parts and air gaps
zz Faulty cooling arrangement Inspect cooling arrangement condition and correct assembly
zz Air intakes are blocked Clear air intakes of debris
z
z
Air filter is clogged
Clean or replace air filters
z
z
Damaged cooling fan(s)
Replace fan(s)
z
z
Cooling fan rotating in the wrong direction
Replace fan(s) or change rotating direction of external fan
z
Overload
Control system setting Check machine controls, eliminate overload
z
z
Overspeed
Check actual speed and ABB speed recommendations
z
Network unbalance Check that network balance fulfils requirements
zzFaulty instrumentation or measurement system Check measurements, sensors and wiring
z Winding fault Check windings
Faulty air flow
Experienced
malfunction
Possible cause Corrective action
High intake air temperature
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