Re: Advice needed on wiring a motor
- From: pentagrid@xxxxxxxxx
- Date: Thu, 10 May 2007 09:51:47 -0700
On Tue, 08 May 2007 18:50:06 +0100, lemel_man
<binswood@xxxxxxxxxxx> wrote:
I have purchased a 3-phase motor from ebay. It is made by Hitachi and
designated as 0.26Kw 4-pole Type EFOUP, Form K.
There are two plates on the side, one containing the above data plus the
legend about the two voltages it can handle, namely 100 and 220.
The other plate shows 2 diagrams of the wiring for the two voltages. The
trouble is, there is no terminal block. Instead, there are 9 wires
coming out of the motor and enclosed in a plastic sheath - all black.
These 9 wires terminate in a plastic plug with 9 terminals, clearly
designed to plug into a socket, but I don't have a clue as to what the
socket looks like, and there are no markings on the plug at all.
The terminals on the plug are arranged in a 3x3 matrix, and three of
them have flats on them so it can be inserted into its socket in one way
only.
By using a continuity tester I determined which plug terminals are
connected to which.
The following link shows a copy of the wiring diagrams on the side
plate, and a schematic of the plug with the connections as determined by
the continuity meter.
http://i106.photobucket.com/albums/m266/lemel_man/Hitachi.gif
From this it would appear to be configured for the lower voltage, but I
need it for the higher voltage. The plug is the type where terminals are
pushed through from the back, so they are clearly visible and there are
no connections between them in the plug, so all the connections are
inside the motor housing.
Can anybody tell me how to change it to 220v please?
--
Regards, Gary Wooding
(To reply by email, change feet to foot in my address)
Your>http://i106.photobucket.com/albums/m266/lemel_man/Hitachi.gif
shows that you have a star connected dual voltage motor, not at
present linked, for Low or High voltage operation.
"Dual Voltage Motor Connections" posted in the drop box
shows the winding arrangement. I
The central three terminals showing continuity on your gif
are terminals 7,8 & 9 of the drop box figure 3.6
One of your outer columns of terminals will be terminals
1,2 & 3, the other column will be terminals 5,6 & 7.
The correct linkage for High voltage is
4 to 7
5 to 8
6 to 9
Line input to 1,2 & 3
This is achieved by three horizontal links on your gif, from the
centre three terminals to either the left or the righthand column
of terminals.
Line input is into the remaining three terminals.
Because the starts and finishes of the windings are not
identified we do not know whether the links should go to the
right hand or to the left hand column - you have to experiment.
If you have chosen the correct column the motor will start
instantly and run quietly and normally at rated speed.
If you've linked to the wrong column the motor will be very
obviously distressed. It will run slowly or not at all, be very
noisy and possibly blow a fuse. The motor will not be harmed by
this but immediately disconnect because it will rapidly overheat.
Good Luck
Jim
.
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