Question about Wilton Floor, #2 MT Spindle, Chuck and Arbor, 220/440V, 3PH, 3HP Motor with Rotary Drum Switch

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I have a 220/440 v single phase 2.2Kw ac motor driving the

Hydraulic pump on a 3 tonnes Tecalemit car lift. It replaces a 1.5Kw 3 phase motor. Problem is that although same speed it is inclined to stall under load and seems to lack the power of the old 3 phase.
The motor is a GEC Kapak Stayrite D100L. The motor case has 9 wires coming out of it to 4 terminations in the connector box plus one to the capacitor. These are: terminal 1:black A3,F8,Unmarked live feed currently on this. Terminal 2: Black 22, Redunmarked. Terminal 3: Black A2 and A41, currently connected to the neutral feed. Terminal 4: one Black and one Red both unmarked.
Can you advise whether or not it is connected correctly to give maximum starting and running torque on 220 volt 50Hz please

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  • Farley Redfield
    Farley Redfield May 11, 2010

    Im going to take a stab at this not seeing the motor leaves me at a disadvantage though.


    Is it really 3 phase? 3 hot lines? are you using HIGH voltage or the lower voltage? Does the plate that goes over the terminals have  a diagram for the wires on it? Should have numbers on it letters wont make any sence to me.

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Read the 'How To' Blog on www.inverterdrive.com - this should help you.

Posted on May 20, 2009

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Tip

How to Reverse the Rotation of Single Phase Capacitor-Start Electric Motors


Reversing the rotation of electric motors can be done easily with 3-phase motors. This can be easily achieved by swapping the connection of any two motor leads. But 3-phase motors are usually found and used for industrial purposes. The ones found and used in our homes, from water pumps to electric fans, are single phase capacitor-start type motors. Unlike 3-phase motors, reversing the rotation of single phase electric motors is no easy task. Swapping any two motor leads will not result in the reversal of the motor rotation. Analysis of the motor windings and connections are necessary before any modification can be done to achieve the desired result. Let's take a 3-speed single phase capacitor-start electric motor with electrical diagram shown below as an example. Make sure the motor is disconnected from the power supply before attempting to follow this tip. This tip is intended only for individuals with electrical knowledge, necessary tools, and understand the risks associated with handling electrical equipments and devices.

jahn27.jpg

The first step in the process is determining the start winding which is connected to the line (AC white) and to one side of the start capacitor. To accurately determine the start winding, disconnect all motor leads from the start capacitor and the speed switch for multi-speed motors and then setting your ohmmeter to the lowest scale (R x 1), measure the resistances between the AC white line and each of the motor leads connecting to the start capacitor. The one with the least resistance is the starting winding lead.

Once the start winding lead going to the capacitor is determined, reconnect the capacitor then connect the black AC line to the found start winding lead (marked X). Connect the white AC line to L of speed switch, the motor lead formerly connected to AC white to 3, red to 2, and white to 1 as shown below. Leave the green/yellow ground wire connection as is.

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Below are the wiring modifications for 2-speed and single speed single phase capacitor-start electric motors.

jahn27_1.jpg


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jahn27_4.jpg

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http://en.wikipedia.org/wiki/Three-phase_electric_power

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I have a 220 440 electric motor on my 4 post 3 ton car lift which ran on 3 phase, how can i run this motor from a single phase supply, regards dave


You need to either change the motor to a single phase or check into a single to three phase converter...I would do which ever is cheaper myself. You could go single phase, but the cost of operation would be higher depending on the duty cycle.

This link may help: http://www.phaseconverter.com/starting-load.html

HTH
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