S.A.Haleem
- Mar 6, 2018
- 9
- Joined
- Mar 6, 2018
- Messages
- 9
I think the 'Y (why) don't use BR-R for step up voltage' was the question........
There's no reason why you can't use BR-R to step up the voltage. Transformers are 'bi-directional' but you MUST be cautious of the absolute ratings to prevent overloading.
hi KabelsalatYou miss voltage reading for BRN-BLU, can't know the wiring without that.
Also the drawing have two terminals both labeled "BLU", both at primary and secondary side, which make little sense for me. Are those connected?
What have the transformer being used for in the past? Dor bell?
The transformer is a 'typical' example of primary over-winding.
Given the wide range of global AC mains standards - anywhere from 110V to 250V (possibly wider) - the manufacturers have additional taps added to the main winding which allows the user to select the correct (or nearest possible) primary input voltage.
You have a FIXED primary mains supply (quoted as 230VAC) therefore if you use a different primary voltage tap you get the equivalent increase or decrease in output voltages.
With 230V applied you show that you get 15VAC out.
Your diagram states 12V and 18V for the other inputs and these represent a 20% variation lower/higher which, when applied to the primary, mean the other taps are meant for 190V and 275V inputs respectively.
The BRN and R taps will be 'in between' taps and only have a nominal difference of 20V between them so CANNOT BE USED together to apply the mains input.
I suggest your transformer has a primary something like:
BLK -0V (neutral)
R - 210V
BN - 220V
GN - 230V
BU - 240V
Y - 250V
How many amps would this transformer supply when build for the use of a charger.
Excuse me, I'm new to this world also I'm not a native speaker so my English isn't the best, I was wondering if you can tell/ teach me how can I use this Transformer. I need it for a 28 VDC application with a LM317T for a Variable supply voltage source, but i don't even know how the transformer works which winding is the ono that should be connected to the network, is it the secondary or the primary? My transformer is a "080-48126-00 0651 Class B Viking B-2 E210832". thank youhi Kelly's eye
Your observation may be correct, regarding BLK to Y, it could be tapping for varied AC inputs, but BRN & R on the primary side are actually secondary ones. My measurements of resistance as below:-
1.(primary side) BRN-R - 1.2 ohms (it cannot be a primary)
2. (primary side) BLK-G - 8 ohms
3. (primary side) BLK-Y - 7.3 ohms
4. (primary side) BLK-BLU - 6.8 ohms
5. (secondary side) BRN-BLU - 0.8 ohms
6. (secondary side) BRN-RED - 0.8 ohms
I hope this will clear you doubts...
Ok, first at all thanks for answering my doubt.Then here is the photo of the transformer and some measurements that i take of the transformer, this are the measures:Please don't hijack old threads - a new thread would be just as applicable.
Post a picture of your transformer. If you have a test meter you can often measure the primary and secondary resistance - the primary being higher (assuming it's a low voltage secondary transformer that you have).