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Posted by Mark Main on April 22, 2006, 6:34 pm
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My Rivett 1020S has a 220/440V 13.4/6.7A 60Hz 5HP 1690RPM motor that is
wired for 480V right now. It's been recommended from this group that
it will be best if I rewire the motor for 240V and so that's what I'm
working on, but I still need some help.
The problem is that not all of the wires to the motor are numbered.
Here's what I know:
The only wires that are numbered are the wires from my power panel
(numbered 1, 2 & 3). These leads connect to the motor wires 1, 2 & 3
respectively for both the high and low volt configurations.
In addition to these 3 power lead connections, my motor is configured
for the high volt configuration, and so it has the following wire
pairs: 4+7, 5+8, and 6+9 (unfortunately these wires are not numbered; I
only know this by the diagram on the motor).
There are also two white wires coming from the motor, one is connected
to wire #2 and the other #3.
I want to wire this for the low volt configuration which is: 1+7, 2+8,
3+9, and 4+5+6.
HERE IS MY CHALLENGE: I only know that 4+7 are paired together, 5+8,
and 6+9, but I don't know their numbers... I only know 1, 2 & 3. Is
there a way using a multi meter or other method to identify what the
wire numbers are?
It's going to be VERY difficult to identify the wires otherwise because
the motor is huge and not easily removed.
Thanks in advance for your help.
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Posted by Mark Main on April 22, 2006, 8:21 pm
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I labeled the wire pairs A, B and C then disconnected all of the wires
and then ran a continuity check on the wires. I got a continuity beep
when I connected the multimeter to one of my two "A" wires on my motor
and the "1" wire on the motor and so I labeled that A wire as "A1"; one
of my two B wires beeped on the 2 wire and so I labeled that B wire as
"B2"; and as expected, one of my C wires beeped on the 3 and so I
labeled that C wire as "C3". This gave me my original 1,2,3 wires,
plus A, A1, B, B1, C, C1.
Does this mean the following:
4=A
5=B
6=C
7=A1
8=B2
9=C3
Or does it mean
4=A1
5=B2
6=C3
7=A
8=B
9=C
Thanks for the help.
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Posted by DoN. Nichols on April 23, 2006, 1:09 am
Please log in for more thread options > I labeled the wire pairs A, B and C then disconnected all of the wires
> and then ran a continuity check on the wires. I got a continuity beep
> when I connected the multimeter to one of my two "A" wires on my motor
> and the "1" wire on the motor and so I labeled that A wire as "A1"; one
> of my two B wires beeped on the 2 wire and so I labeled that B wire as
> "B2"; and as expected, one of my C wires beeped on the 3 and so I
> labeled that C wire as "C3". This gave me my original 1,2,3 wires,
> plus A, A1, B, B1, C, C1.
>
> Does this mean the following:
>
> 4=A
> 5=B
> 6=C
> 7=A1
> 8=B2
> 9=C3
No! You should get a beep between A, B, and C, which will mean
that they are 7, 8, and 9. The one which beeps connected to 1 will be 4
(A1), etc as below.
> Or does it mean
>
> 4=A1
> 5=B2
> 6=C3
> 7=A
> 8=B
> 9=C
Yes -- this is the right way.
Let me draw it for you (using "W"s as windings. Be sure to use
a fixed pitch font so this is not distorted by treating spaces as
shorter than 'W's and '-'s.
(L1)-(1)---WWWWWWWW---(4)-(7)---WWWWWWWW---(X)
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(L2)-(2)---WWWWWWWW---(5)-(8)---WWWWWWWW---(X)
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(L3)-(3)---WWWWWWWW---(6)-(9)---WWWWWWWW---(X)
All three 'X's are connected together buried inside the motor, just as
you will connect 4, 5, and 6 together in the wiring box.
When you are done, it will look like this (the "- | -" are where
wires pass without connecting):
(L1)-(1)---WWWWWWWW---(4)--+ <--- splice and insulate 4, 5, and 6
| |
(7)---WWWWWWWW---(X)- | -+
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(L2)-(2)---WWWWWWWW---(5)--+ |
| | |
(8)---WWWWWWWW---(X)- | -+
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(L3)-(3)---WWWWWWWW---(6)--+ |
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(9)---WWWWWWWW---(X)-----+
Enjoy,
DoN.
--
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
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Posted by Karl Townsend on April 22, 2006, 9:01 pm
Please log in for more thread options FWIW, I had the exact same problem with my Mazak lathe. After getting all
the help I could here, I still had four possible ways to try. I ended up
hooking the motor up to a small motor contactor. The connection that didn't
blow the overloads immediately turned out to be the one that worked.
Someone here may cringe, but the only other option was to take the motor out
and bring it in to a motor shop.
karl
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Posted by John on April 22, 2006, 10:15 pm
Please log in for more thread options Mark Main wrote:
>
> My Rivett 1020S has a 220/440V 13.4/6.7A 60Hz 5HP 1690RPM motor that is
> wired for 480V right now. It's been recommended from this group that
> it will be best if I rewire the motor for 240V and so that's what I'm
> working on, but I still need some help.
>
> The problem is that not all of the wires to the motor are numbered.
> Here's what I know:
>
> The only wires that are numbered are the wires from my power panel
> (numbered 1, 2 & 3). These leads connect to the motor wires 1, 2 & 3
> respectively for both the high and low volt configurations.
>
> In addition to these 3 power lead connections, my motor is configured
> for the high volt configuration, and so it has the following wire
> pairs: 4+7, 5+8, and 6+9 (unfortunately these wires are not numbered; I
> only know this by the diagram on the motor).
>
> There are also two white wires coming from the motor, one is connected
> to wire #2 and the other #3.
>
> I want to wire this for the low volt configuration which is: 1+7, 2+8,
> 3+9, and 4+5+6.
>
> HERE IS MY CHALLENGE: I only know that 4+7 are paired together, 5+8,
> and 6+9, but I don't know their numbers... I only know 1, 2 & 3. Is
> there a way using a multi meter or other method to identify what the
> wire numbers are?
>
> It's going to be VERY difficult to identify the wires otherwise because
> the motor is huge and not easily removed.
>
> Thanks in advance for your help.
first, disconnect the power wires paired wires and keep them marked..
4,7 5,8 and 6.9
4 5 and 6 are the other ends of the 1,2 and 3 wires, so tie the wires
together that have continuity to 1 2 and 3. and at the same time you can
tell the 7 8 and 9 wires by the continuity checks from 1, 2 and 3.
and that you know that 1 contunity to 4 which is tied to seven...... and
so forth. 2 cont. to 5 which was tied to 8. ......... also 7, 8 and 9
wires other ends are tied together and buried in the motor so you will
get contunity between 7,8 and 9.
Hope this helps......
John
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> and then ran a continuity check on the wires. I got a continuity beep
> when I connected the multimeter to one of my two "A" wires on my motor
> and the "1" wire on the motor and so I labeled that A wire as "A1"; one
> of my two B wires beeped on the 2 wire and so I labeled that B wire as
> "B2"; and as expected, one of my C wires beeped on the 3 and so I
> labeled that C wire as "C3". This gave me my original 1,2,3 wires,
> plus A, A1, B, B1, C, C1.
>
> Does this mean the following:
>
> 4=A
> 5=B
> 6=C
> 7=A1
> 8=B2
> 9=C3