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Old 12-08-2009, 12:18 PM   #31
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At what voltage is a 24v transformer considered too weak?


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Originally Posted by SULTINI View Post
Philp
Your statement problem solved - at least for now.
Is a true statement once a valve sticks it will do it again and it will at the time you least expect it 20o outside, holidays, weekends, middle of night.
So the point being replace it ASAP because it will let you down again.
Be prepared.

Better listen to Sultini, he is so right. If that valve sticks open it will do it again.

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Old 12-08-2009, 03:04 PM   #32
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At what voltage is a 24v transformer considered too weak?


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Originally Posted by beenthere View Post
10.

Apply the math. And you'll see it doesn't work out like you thing.
"A 24v 40 VA 'frmr with 26v open circuit voltage, at 21v, is delivering ~4A. "

40/24 = 1.67 A full load current

24/1.67 = 14.4 ohms full load resistance value

26/(Rint + 14.4) = 1.67A Assuming the 'frmr internal impedance is mostly resistive

26/1.67 = (Rint + 14.4) = 15.6 ohms

Rint = 1.17 ohms

4A x 1.17 = 4.7 v

26-4.7 = 21.3v

?
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Old 12-08-2009, 05:34 PM   #33
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At what voltage is a 24v transformer considered too weak?


It's not a resistive load. It's inductive.
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Old 12-08-2009, 05:49 PM   #34
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At what voltage is a 24v transformer considered too weak?


As clover stated, a solenoid is an inductive load.

Ohm's laws, only apply to resistive loads. And are for DC.
And we are talking AC, not DC.

While it can be used on AC loads. It is not 100% accurate.
So it won't work out in many cases, And this topic, is one of those cases.
There are formulas for it though.
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Old 12-08-2009, 06:00 PM   #35
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At what voltage is a 24v transformer considered too weak?


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Originally Posted by beenthere View Post
As clover stated, a solenoid is an inductive load.

Ohm's laws, only apply to resistive loads. And are for DC.
And we are talking AC, not DC.

While it can be used on AC loads. It is not 100% accurate.
So it won't work out in many cases, And this topic, is one of those cases.
There are formulas for it though.
Ay, yi, yi. . .
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Old 12-08-2009, 06:07 PM   #36
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At what voltage is a 24v transformer considered too weak?


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Ay, yi, yi. . .
Come and spend 10 or 20 year on the dark side. And then you will understand.
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Old 12-08-2009, 06:26 PM   #37
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At what voltage is a 24v transformer considered too weak?


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Come and spend 10 or 20 year on the dark side. And then you will understand.
Is growing up in NJ enough of a Dark Side for you?

And may the Farce be with you!

Last edited by Yoyizit; 12-08-2009 at 06:30 PM.
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Old 12-08-2009, 06:50 PM   #38
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At what voltage is a 24v transformer considered too weak?


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Is growing up in NJ enough of a Dark Side for you?

And may the Farce be with you!

Nah, jerseys just talk funny.
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Old 12-09-2009, 12:05 PM   #39
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At what voltage is a 24v transformer considered too weak?


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Nah, jerseys just talk funny.
Pronunciation guide to NJ:
Jersey = Joisey
dog= dawg
coffee = cawfee
father = fada
mother = mudda
What do you = whaddya'

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