ow2knives
Cast Iron
- Joined
- Nov 16, 2002
- Location
- Arvada Colorado
I am balancing the phases on my 7.5hp rotary phase converter by adding capacitance to the B-C leg and the A-B leg using as a reference an article by Bob Swinney in the Dec 2001 Home SHop Machinist.
As supplied the unit came with 2 three terminal caps. They are both marked 24 - 24 - 24 microfarads. They are wired in parrallel between the B and C leg using only one side of each capacitor - giving a total of 48 mf between the B and C leg
According to Swinney I require a minimum of 30 mf per HP giving a total of 225 mf for a 7.5HP unit. I have a lot of capacitance to add.
It seems that one should be able to use the second capacitor in each of the cans? How should they be wired? Common sense suggests that if the B leg is connected to the center terminal then the C leg can be connected to both outer terminals giving a total of 48 mf per unit and 96 for both?
I would really appreciate it if someone would confirm my thinking here.
many thanks.
Owen Wood
As supplied the unit came with 2 three terminal caps. They are both marked 24 - 24 - 24 microfarads. They are wired in parrallel between the B and C leg using only one side of each capacitor - giving a total of 48 mf between the B and C leg
According to Swinney I require a minimum of 30 mf per HP giving a total of 225 mf for a 7.5HP unit. I have a lot of capacitance to add.
It seems that one should be able to use the second capacitor in each of the cans? How should they be wired? Common sense suggests that if the B leg is connected to the center terminal then the C leg can be connected to both outer terminals giving a total of 48 mf per unit and 96 for both?
I would really appreciate it if someone would confirm my thinking here.
many thanks.
Owen Wood