6.2.4 Cleaiiig the wiidiigs
Respoisibility: Service techiiciai
Prerequisites: The alteriator is at a staidstll
Frequeicy: Every 20,000 hours or more frequeitly ii the case of dusty eiviroimeits
NOTE
Contact Mecc Alte S.p.a. for thorough washing in case of windings in a very bad state.
➔
Disassemble the alternatir (see
6.6 Disassembly of the alternators
➔
Clean the aindings alternatir using speciic high-evapiratin silvents fir electric aindings
➔
Perfirm the filliaing cintrils after the cleaning iperatins:
●
Check fir the presence if traces if carbinisatin;
●
Check the integrity if the aindings insulatin;
●
Measure the isilatin resistance.
6.2.5 Resistaice/coitiuity test
Respoisibility: Service techiiciai
Prerequisites: The alteriator aid the prime eigiie are at a staidstlln the alteriator is
discoiiected from the eiergy sources
Perfirm the test in the ritir aindings and the aindings if the main statir if the exciter. Fir the
3.3.6 Resistance of the windings
Maii stator
➔
Use a multmeter ti measure the resistance/cintnuity if the phases;
Maii rotor
➔
Use a multmeter ti measure the resistance/cintnuity if the main ritir ainding;
Exciter stator
➔
Use a multmeter ti measure the resistance/cintnuity if the exciter statir ainding betaeen
the pisitve aire (yellia) and the negatve aire (blue).
Exciter rotor
➔
Use a multmeter ti measure the resistance/cintnuity if the exciter ritir ainding betaeen
phase and phase.
Self-regulating alternators ECO47-49 MV-HV
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