load calculation
- Thread starter steveng
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quogueelectric
Senior Member
- Location
- new york
100 va xformer can handle 100 volt/amps.
mivey
Senior Member
Yes, except you have a typo. You should have 100/120 = 0.83a primary.steveng said:need help on this calc,
100 va xfmr can handle what load on 24vac
100 va xfmr can handle what load on 12 vac
100/24=4.1a secondary
100/12=8.3a secondary
120/100=.83a primary
am i reading this correct?
gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
080623-0618 EST
steveng:
Your calculations are correct except that the third one should be written as
100/120 = 0.83
The primary current will be somewhat higher because of transformer losses.
.
steveng:
Your calculations are correct except that the third one should be written as
100/120 = 0.83
The primary current will be somewhat higher because of transformer losses.
.
keepitsimplestupid
Member
Actually, you have windings in parallel or series. Power is conserved.
Ppri = Psec; P = VI
VpriIpri=VsecIsec = 100
Ppri = Psec; P = VI
VpriIpri=VsecIsec = 100
gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
080624-2212 EST
steveng:
Use a slow-blow, but its value will depend upon the actual load and inrush current. I also might use a negative temperature coefficient thermistor to reduce inrush current.
I never understood the purpose of the comment on series and parallel and how it related to your question.
.
steveng:
Use a slow-blow, but its value will depend upon the actual load and inrush current. I also might use a negative temperature coefficient thermistor to reduce inrush current.
I never understood the purpose of the comment on series and parallel and how it related to your question.
.
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