Run capacitor advantages?

[Ballvalve]

Mainly for the well guys, do you always install capacitor RUN [CSCR] control boxes, or do you find the cheaper capacitor start boxes adequate on lower HP motors? Also can I add a run capacitor to a standard start cap only box? Or would I need a different relay. Thanks.

 

[Boycedrilling]

I would refer you to page 15 of the Franklin AIM manual

https://franklinwater.com/more/serv...-motors/page-15/#Auxiliary-Running-Capacitors

 

[Sponsor]

 

[Fitter30]

Like any electrical device you can't deviate from the manufacturer recommendations. Can't add or subtract within 10% of its ratings and wouldn't even do that on a permanent fix.

 

[Ballvalve]

Like any electrical device you can't deviate from the manufacturer recommendations. Can't add or subtract within 10% of its ratings and wouldn't even do that on a permanent fix.

So that raises the question about Franklins 1 Hp CSCR QD [Quick disconnect] control box and the next step up the larger, non QD box rated 1 to 1.5 hp. The QD box has a 23 uf run capacitor and the "deluxe" large box uses a 10 uf start cap. How would the 1 hp motor accept both a 23 or a 10 uf run capacitor?

 

[Ballvalve]

I would refer you to page 15 of the Franklin AIM manual

https://franklinwater.com/more/serv...-motors/page-15/#Auxiliary-Running-Capacitors

Thanks for that link, I have been in the AIM manual many times but missed that.

 

[WorthFlorida]

So that raises the question about Franklins 1 Hp CSCR QD [Quick disconnect] control box and the next step up the larger, non QD box rated 1 to 1.5 hp. The QD box has a 23 uf run capacitor and the "deluxe" large box uses a 10 uf start cap. How would the 1 hp motor accept both a 23 or a 10 uf run capacitor?

Not too sure of your question but many motors have both start and run caps.
https://franklinaid.com/2006/05/07/control-boxes-more-than-meets-the-eye/

However, a motor has completely different electrical properties at start-up than when it is up-to-speed and running. Because of this, as the motor approaches running speed, the start capacitor and the start winding must be disconnected, and the motor operated on the run winding alone. The timing of this is critical: Take the start winding and start capacitor out of the circuit too soon, and you sacrifice starting torque. Leave them connected for too long, and the current, or amperage, in the motor and in the capacitor will be too high for too long. So, the job of the QD Relay is to remove, or disconnect, the start capacitor and start winding as the motor reaches running speed.

 

[Reach4]

The AIM manual numbers sound like a good numbers. But if you were trying various capacitors, the capacitor that minimized the L1 or L2 current while pumping would be more nearly optimum.