21-04-2012, 08:21 PM
Hi,
Many thanks Alan. It was a pleasure to show you and Steve round and if you are ever nearby again please drop in for a visit.
Here are a few more pictures of the 3 phase which might be of interest although the capacitors might put novices off from trying.
I imported a selection of high voltage capacitors from the USA and found it cheaper than buying here in the UK even with the cost of the shipping. I already had a good stock of 8uF motor run caps and many of these were used. The capacitor connections are "Series-Parallel" and it was fascinating to be able to change the voltage on the third phase at will.
Imported capacitors.
Doug put a guy here in the UK in touch with me as we are on 240V and I had already sorted my transformer out so was able to offer advice. This guy really did go to town by investing in lots of instruments and setting up a large test panel with switches enabling him to switch in and out the capacitors. His messages suddenly ended and I hope he is still OK.
The other guys capacitor box.
I rigged up a temporary wooden enclosure to house the phase balancing caps on my big Startrite bandsaw but later made a proper job by fitting a proper metal enclosure; I ensured everything had a good earth connection.
My phase balancing capacitors and the transformer hooked up on test.
I also pulled out a few more pictures of transformer winding and the first one shows a block of pitch with a transformer hidden somewhere inside; I did not like stripping this transformer at all but did eventually re-wind it. The fault was an open circuit primary winding that had burnt out in fact it had burnt through a lot of layers and the black dot seen in the picture became bigger as the layers were removed.
There's a transformer in here somewhere and the black dot indicating the burnt section.
The final picture shows my manual AVO Douglas winder in action winding a small transformer. Once I had wound my first transformer everything simply dropped into place and others became very easy allowing me to quickly progress into designing and winding to my own specification as shown by the 3 phase transformer. If I can understand the process and pick it up just from a few pages out of a book then it can't be hard.
Kind regards, Col.
Winding a small transformer.
Many thanks Alan. It was a pleasure to show you and Steve round and if you are ever nearby again please drop in for a visit.
Here are a few more pictures of the 3 phase which might be of interest although the capacitors might put novices off from trying.
I imported a selection of high voltage capacitors from the USA and found it cheaper than buying here in the UK even with the cost of the shipping. I already had a good stock of 8uF motor run caps and many of these were used. The capacitor connections are "Series-Parallel" and it was fascinating to be able to change the voltage on the third phase at will.
Imported capacitors.
Doug put a guy here in the UK in touch with me as we are on 240V and I had already sorted my transformer out so was able to offer advice. This guy really did go to town by investing in lots of instruments and setting up a large test panel with switches enabling him to switch in and out the capacitors. His messages suddenly ended and I hope he is still OK.
The other guys capacitor box.
I rigged up a temporary wooden enclosure to house the phase balancing caps on my big Startrite bandsaw but later made a proper job by fitting a proper metal enclosure; I ensured everything had a good earth connection.
My phase balancing capacitors and the transformer hooked up on test.
I also pulled out a few more pictures of transformer winding and the first one shows a block of pitch with a transformer hidden somewhere inside; I did not like stripping this transformer at all but did eventually re-wind it. The fault was an open circuit primary winding that had burnt out in fact it had burnt through a lot of layers and the black dot seen in the picture became bigger as the layers were removed.
There's a transformer in here somewhere and the black dot indicating the burnt section.
The final picture shows my manual AVO Douglas winder in action winding a small transformer. Once I had wound my first transformer everything simply dropped into place and others became very easy allowing me to quickly progress into designing and winding to my own specification as shown by the 3 phase transformer. If I can understand the process and pick it up just from a few pages out of a book then it can't be hard.
Kind regards, Col.
Winding a small transformer.
Happiness is a wreck of a cabinet to restore.
