Re-wiring Delco 37.5 KVA generator for single phase
Re-wiring Delco 37.5 KVA generator for single phase
(OP)
Hello.
I purchased a three phase generator at a discount but need to use it primarily for single phase use.
My questions are similar to this thread:
http://www.eng-tips.com/viewthread.cfm?qid=168708
which was discussed with some great tips.
In my search, I came across this document regarding generator windings:
http:// www.power- tronics.co m/Diagrams /Generator wiring.htm
I have some questions re. this table.
What would the numbers 1 through 12 represent exactly? That is, what are the 'pairs' of leads that represent a winding? What is the phasing of the windings? Ex - leads 1&2, 3&4, etc might be pairs and 1 and 3 might be the same phase. Well 'phase' is not the word I am looking for here - you know what I mean - same 'end' of the winding.
Are all windings 'equivalent'? That is, they give the same voltage, just differing by phase??
Maybe if someone could refer me to a sort of schematic of a generator with 12 leads, that would be helpful.
The only schematics I can find are things like this:
htt p://www.tp ub.com/con tent/et/14 093/css/14 093_54.htm
Which shows just six terminals for the three phases. What are the other three windings?
BTW, the generator is a Delco 37.5 KVA with a Detroit Diesel engine. I think it was manufactured in the 70's.
Thanks for reading,
DJ
I purchased a three phase generator at a discount but need to use it primarily for single phase use.
My questions are similar to this thread:
http://www.eng-tips.com/viewthread.cfm?qid=168708
which was discussed with some great tips.
In my search, I came across this document regarding generator windings:
http://
I have some questions re. this table.
What would the numbers 1 through 12 represent exactly? That is, what are the 'pairs' of leads that represent a winding? What is the phasing of the windings? Ex - leads 1&2, 3&4, etc might be pairs and 1 and 3 might be the same phase. Well 'phase' is not the word I am looking for here - you know what I mean - same 'end' of the winding.
Are all windings 'equivalent'? That is, they give the same voltage, just differing by phase??
Maybe if someone could refer me to a sort of schematic of a generator with 12 leads, that would be helpful.
The only schematics I can find are things like this:
htt
Which shows just six terminals for the three phases. What are the other three windings?
BTW, the generator is a Delco 37.5 KVA with a Detroit Diesel engine. I think it was manufactured in the 70's.
Thanks for reading,
DJ






RE: Re-wiring Delco 37.5 KVA generator for single phase
RE: Re-wiring Delco 37.5 KVA generator for single phase
Nos 1 to 12 represent various sections of ac winding as shown by nawao's attachment. Unless your generator had these sections brought out originally, you'll get only six leads normally.
A lps for both of you.
RE: Re-wiring Delco 37.5 KVA generator for single phase
A 12 lead generator has 6 windings, two per phase.
Each end of each winding has a number.
The numbers are:
"A" phase, 1-4, and 8-10
"B" phase, 2-5,and 9-11
"C" phase, 3-6, and 10-12
In a 10 lead generator leads 10, 11, and 12 are connected internally and brought out as #10.
The bar/diamond connection, or the Collins connection was discussed a few days ago on this site.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Re-wiring Delco 37.5 KVA generator for single phase
I haven't looked to see what leads are available (10 vs 12). Bought it but haven't picked it up yet.
Perhaps a silly question, but why are there two windings per phase rather than one? Are they 'equivalent'. Is it a mechanical issue?
I imagine that they are equivalent since they are paralleled or series connected.
Now I need to go back to the thread on 3->1 ph conversion and see if the 10 lead generator causes an issue with this.
Looks like it would, based on this chart as listed above:
http://
DJ