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Thread: Start capasitor problems
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23rd February 2013, 06:04 PM #1
Intermediate Member
- Join Date
- Jul 2012
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- Newcastle
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- 29
Start capasitor problems
Hi
Does anyone other than me go through start caps on 3 hp imported 240 volt single phase motors. My saw has blown 2,and today my dusty blew 2 150uf caps. The only spare i had was a 300uf. I put it in anyway and it looks like it is holding. Will this damage the motor?
Kev
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23rd February 2013, 06:41 PM #2
Retro Phrenologist
- Join Date
- Oct 2009
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- Springfield NSW
- Age
- 70
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Much more important than the uF rating is the peak votage rating. It should be at least 400V.
You won't damage the motor but you might get sparks and flames if the voltage rating is low.____________________________________________________________
there are only 10 types of people in the world. Those that understand binary arithmetic and those that don't.
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23rd February 2013, 08:10 PM #3
Intermediate Member
- Join Date
- Jul 2012
- Location
- Newcastle
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- 29
Thanks Avery. Caps are 400volt as supplied to me by the retail outlet that sold me my saw with instructions on changing them(relax admin just changing a capistor ) I am more intrested in why they fail. I checked the voltage at the powerpoint (240 to 250 volt) and does not drop when the dusty is started. Checked with my electo who wired the workshop 6 months ago and it's wired to 20 amp specs.
Kev
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