Hi All!
I hope this question is in the correct part of the forum. I think it qualifies as a project?
I was given a Sola Constant Voltage Transformer years ago. It is their Model 23-13-060 CVS-1. The input voltage is 95-130 60Hz & the output is (was) 118 vac. The unit is rated 0.5 amp
My trouble is that now the output is 127.4 volts with an input of 120.6 as measured with a RMS multimeter.
My guess is, since the secondary voltage is high, the capacitor(s) is the source of the problem. I was expecting to find two capacitors, but there's only one.
I removed the capacitor from the device & found 0.2mf as the reading. If I ground the shell, as it was when installed, the reading remains the same.
The only identification on the capacitor contains:
Sprague Clorinol Capacitor
1.75-660ac
9945 P48843 6826
It is oval shaped cylinder, similar to a motor run capacitor.
I don't know if this matters, but it measures 3-1/8 tall and the oval is 2-1/8 x 1-9/16
So, I have the voltage range, but not the capacitance.
Here's What I Tried-
A) Searching this forum. I managed to sidetrack myself for a few hours & have loads of educational fun.
B) Emmerson-Sola for information on capacitor size. They replied that they did not keep any data for that unit when they acquired Sola. Nor did some Sola sales outlets.
C) I also contacted Vishay-Sprague. They also indicated they did not keep any Sprague Chorinol information when Vishay bought Sprague.
D) Next attempt was to internet search any combination of numbers from the capacitor, as well as the word(s). No luck
E) Finally, I searched the patent numbers from the Sola unit. No luck- Drawings were available, but not capacitor details.
Do any of you have experience with this or a similar unit & suggestions for capacitor sizing?
I appreciate your help!
Paul
I hope this question is in the correct part of the forum. I think it qualifies as a project?
I was given a Sola Constant Voltage Transformer years ago. It is their Model 23-13-060 CVS-1. The input voltage is 95-130 60Hz & the output is (was) 118 vac. The unit is rated 0.5 amp
My trouble is that now the output is 127.4 volts with an input of 120.6 as measured with a RMS multimeter.
My guess is, since the secondary voltage is high, the capacitor(s) is the source of the problem. I was expecting to find two capacitors, but there's only one.
I removed the capacitor from the device & found 0.2mf as the reading. If I ground the shell, as it was when installed, the reading remains the same.
The only identification on the capacitor contains:
Sprague Clorinol Capacitor
1.75-660ac
9945 P48843 6826
It is oval shaped cylinder, similar to a motor run capacitor.
I don't know if this matters, but it measures 3-1/8 tall and the oval is 2-1/8 x 1-9/16
So, I have the voltage range, but not the capacitance.
Here's What I Tried-
A) Searching this forum. I managed to sidetrack myself for a few hours & have loads of educational fun.
B) Emmerson-Sola for information on capacitor size. They replied that they did not keep any data for that unit when they acquired Sola. Nor did some Sola sales outlets.
C) I also contacted Vishay-Sprague. They also indicated they did not keep any Sprague Chorinol information when Vishay bought Sprague.
D) Next attempt was to internet search any combination of numbers from the capacitor, as well as the word(s). No luck
E) Finally, I searched the patent numbers from the Sola unit. No luck- Drawings were available, but not capacitor details.
Do any of you have experience with this or a similar unit & suggestions for capacitor sizing?
I appreciate your help!
Paul