help w/transformer id/markings ?

[robb]

i have a transformer that i am trying to understand what it
suppose to produce from the different wwires

the transformer only has these markings
92-326-416-91 115v 60hz
30/8/2 x 2.3v
VDE0551 UL

i have googled these numbers to no end

do these numbers give some clue as to nature of transformer ?
or enough info to find a suitable replacement ?

or enough to test it andhow would one test a transformer kjust
check volts at various pins

any help or links describing the meaning of numbers would be
greatly appreciated

thanks,
robb

 

[Jamie]

i have a transformer that i am trying to understand what it
suppose to produce from the different wwires

the transformer only has these markings
92-326-416-91 115v 60hz
30/8/2 x 2.3v
VDE0551 UL

i have googled these numbers to no end

do these numbers give some clue as to nature of transformer ?
or enough info to find a suitable replacement ?

or enough to test it andhow would one test a transformer kjust
check volts at various pins

any help or links describing the meaning of numbers would be
greatly appreciated

thanks,
robb

lets see.
115volts input at 60 hz.

30 volt out tape, 8 volt out tap, and 2 2.3 volt taps.
hows that for guessing ?

 

[robb]

lets see.
115volts input at 60 hz.

30 volt out tape, 8 volt out tap, and 2 2.3 volt taps.
hows that for guessing ?

Thanks Jamie.
but that I can find those values on various combinations of
taps/pins (along with other values) but they are not what i would
expect ?

that is the transformer has the 2 - 115v input pins and then 8
output connectors,
the 8 outputs *by continuity tests are grouped 3/3/2 and the
voltages are not a predictable pattern

i get something like this where (#) is an output connection and
___ covers continuity group

_________________ __________________ __________
(1) 2.73v (2) 2.73v (3) (4) 8.22v (5) 16.42v (6) (7)
28.8v (8)
\ / \
/
` 5.45v ' ` 8.22v
'

does this make sense >

thanks for help
robb

 

[Jamie]

Thanks Jamie.
but that I can find those values on various combinations of
taps/pins (along with other values) but they are not what i would
expect ?

that is the transformer has the 2 - 115v input pins and then 8
output connectors,
the 8 outputs *by continuity tests are grouped 3/3/2 and the
voltages are not a predictable pattern

i get something like this where (#) is an output connection and
___ covers continuity group

_________________ __________________ __________
(1) 2.73v (2) 2.73v (3) (4) 8.22v (5) 16.42v (6) (7)
28.8v (8)
\ / \
/
` 5.45v ' ` 8.22v
'

does this make sense >

thanks for help
robb

I think what you have is a CT (center tapped) 1,2,3. 2 being the tap for
common to drive a full wave 2 diode rectifier or, used 1 and 3 to drive
a full wave bridge for 5 volts. The next set is also a CT with 8 volts
from CT to CT or, 16 volts if you don't use the CT. and the last one
is just a 28 volt out or 30 as indicated on the xformer with no CT>

Not sure what type of logic this is driving how ever, I would guess
that it maybe supplying a 3.3 V regulator from the 1,2,3 points and
a maybe a five volt regulator from 3,4 and 5 points.

You can also config it so that when using a bridge rectifier, you can
get a + and - supply with respect to common via the CT>

 

[robb]

I think what you have is a CT (center tapped) 1,2,3. 2 being the tap for
common to drive a full wave 2 diode rectifier or, used 1 and 3 to drive
a full wave bridge for 5 volts. The next set is also a CT with 8 volts
from CT to CT or, 16 volts if you don't use the CT. and the last one
is just a 28 volt out or 30 as indicated on the xformer with no CT>

Not sure what type of logic this is driving how ever, I would guess
that it maybe supplying a 3.3 V regulator from the 1,2,3 points and
a maybe a five volt regulator from 3,4 and 5 points.

You can also config it so that when using a bridge rectifier, you can
get a + and - supply with respect to common via the CTt

thanks Jamie,
this transformer connects to two bridge rectifiers. 28 v goes to
rectifier to power a VFD
and the 8 or 16 v to a rectifier to power a dual full bridge
driver *L298* and then the 5v for ICs ?

i guess i was expecting more predictable voltages like 5/12 etc.
but was getting 5.27, 8.32 etc...
so iwas not sure if maybe there was a problem with the
transformer.

thanks for the help,
robb