Motor start and run capacitors...

[Externet]

What is the difference in their construction ? What makes them suitable for one and not the other use ?
Can a 10μF 'for run' be used as 'for start' ?

 

[KlausST]

Yes, ... if you have a suitable motor for the capacitor.

Usually it is the other way round: You buy a motor ... and the datasheet tells you which capacitor to use.

Klaus

 

[Externet]

OK. A motor that has a xμF 'for start' installed from factory; can it use a xμF 'for run' in its place ? What in its internal construction differs ?

 

[KlausST]

Hi,

I expect the motor datasheet to provide all necessary informations.

Klaus

 

[FvM]

Dedicated start capacitors are not necessarily suited for continuous operation, run capacitors are.

 

[Easy peasy]

start caps are very lossy - they get very hot if used for longer than a few seconds starting time