230yy/460y volts
230yy/460y volts
(OP)
What is the y and yy?
tks, paul
tks, paul
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RE: 230yy/460y volts
Chances are there are nine leads brought out so one winding is permanently connected in star and the other can either be connected in series with it or can itself be connected in star and the two star windings paralleled.
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If we learn from our mistakes I'm getting a great education!
RE: 230yy/460y volts
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RE: 230yy/460y volts
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If we learn from our mistakes I'm getting a great education!
RE: 230yy/460y volts
RE: 230yy/460y volts
Looks like it is wired in YY right now.
RE: 230yy/460y volts
RE: 230yy/460y volts
To switch to 'Y' you would remove the shorting bar on the right vertical terminals and the black wires running from the bottom terminals to the left vertical terminals. Then, connect the corresponding vertical terminals with a shorting bar (or the black wires if you like) as per the wiring diagram.
RE: 230yy/460y volts
RE: 230yy/460y volts
Take the photo and rotate it 90° CCW so that it aligns with the diagram. As connected you have Y-Y with phase 1 connected to U1 and U5, phase 2 connected to V1 and V5, and phase 3 connected to W1 and W5. The shorting bar provides the wye point for the 1/2 windings, while the wye point of the 5/x windings is internal. For Y, you just have the windings in series as shown in the diagram.
RE: 230yy/460y volts
RE: 230yy/460y volts
Bill
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"Why not the best?"
Jimmy Carter
RE: 230yy/460y volts
RE: 230yy/460y volts
The diagram matches the picture but the picture is rotated.
The shorting links in the picture are between W2, U2 and V2 on the diagram. Remove the shorting links.
The black wires in the picture are between U1 and U5, W1 and W5, V1 and V5 on the diagram. Remove the jumpers.
Now install the shorting links between W2 and W5, U2 and U5, V2 and V5.
The motor will now be wired for 460 volt operation.
For either 230 volts or 460 volts the power is connected to W1, U1, and V1.
Terminal layout.
W5 W2
U5 U2
V5 V2
W1 V1 U1
W1=L3
V1=L2
U1=L1
Power is applied to W1, V1, and U1 for either 230 volts or 460 volts.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 230yy/460y volts