After removing the rear end bell of the motor, the point in the winding that was formed by joining the three internal ends of the three phases together must be located. In order to do this procedure, written by Augie Hand, you will need a 6 or a 12 volt battery an Analog Voltmeter, and tape to label leads. By using an ohmmeter or test light, lead 1 will show continuity with lead 4, and the end or ends disconnected from lead 1 will show continuity with lead 9. I think they also may have soldered the other connections as well, that would explain why some of the wire numbers were missing and re-applied with after market tape numbers. Never mind, I think I got it. This concludes the lead testing of the nine lead star connected motor. Lead 3 will show continuity with lead 6 and the end or ends disconnected from 3 will show continuity with lead 8.
See page 3 for connections. Answer: For the purpose of this test, a lantern battery of six or nine volts works best. . There are lots of good contents to go through here, so it is a good idea to subscribe to this site to keep you updated of new articles so you can come back again later as often as you want and go over the contents at your own pace. Motors can be wired delta or wye. For low voltage, also T7-T8-T9, forming a secondary Y point. Refer to the diagrams on the following page for further details.
It is in a Kearney Trecker Milwaukee H Model Milling Machine. This completes the modification of the motor as shown by the diagram above marked Step 2. Before measuring the continuity of the motor's internal connection, make sure that all external wiring terminal of the motor is disconnected first to ensure accurate continuity readings. The same method applies in carrying out the procedure for determining the internal winding configuration of the 9 leads delta connected motor similar to the procedure applied to the 9 leads star connected motor, which is to to measure the continuity of the motor's internal coil winding through the wiring terminals accessible from the motor's terminal box. We are trying to connect it to 230V Anyone? I didn't understand any other words on the instruction plate of the motor or control transformer. Use 2 colors to mark each of the 1-2-3 wires to denote different end of the winding. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the.
If so then there is no way to wire it for 240. On the other hand, the star connected motor will have only one set of three leads with continuity between them, and three sets of two leads with continuity. So leads 4 and 9 can now be labeled. Thanks for contributing an answer to Electrical Engineering Stack Exchange! Star Connected Motor: Mark the three leads with continuity, 7, 8, and 9. With the motor modified per the above procedure, it may now be used with a 460 Volt H-A-S Static Converter only. Before you connect any wires, check the drawing carefully. Stardelta, any jobs up there for an old Brush bloke? The connection box has 9 leads coming out, not 12 as I would have expected.
However, I daily hook up 3 phase motors in either delta for straight single speed 440 volt 3 phase operation, or in star for 220 volt operation via a solid state frequency converter which permits the machine to have a variable speed control. For the delta start, dual voltage nine lead motor on the lower voltage, connect 1, 6, and 7 to L1. This is the internal star. After the Star Point is located, the three ends are then separated. Three phase motor wire connections First read the nameplate for wiring instructions.
It is simple, you can utilize the save link or you can place your cursor to the photo and right click then choose save as. You can also take the motor apart to determine proper sequence but I think you still have to perform kick testing to get it all firmed up. Each phase winding must be separated as illustrated in Step 2. Life is much easier with only one voltage. Flash 8 with the + battery terminal.
A length of lead wire should be attached to this and marked 12. Steve discusses how to identify unmarked 9 lead Delta connection on a motor. It should become fairly obvious whether it is in star or delta once you start taking the measurements as there can only be a certain pattern of readings - providing the windings are in sound condition. With an upscale reading, the + lead of the volmeter will be on 3 and the — voltmeter will be on 6. Another variation of wiring configuration for a 9 leads motor connection apart from the 9 leads star wye connection is the.
Thanks,Dean You might do a search for this online. Keywords for 9 Lead Motor Connection Diagram :. It is readily identified by three wires or groups of wires in individual sleevings joined together electrically and mechanically inside the motor winding. The basic wiring diagram is 1-7 to one phase, 2-8 to second phase, 3-9 to third phase and 4-5-6 hooked together to be the external star. All ends must be separated.
Instead, connect motor lead 1 and 6 to L1 typically black , motor lead 2 and 4 to L2 typically red , and motor lead 3 and 5 to L3 typically blue. Then with the ohm meter, find three pairs that have continuity. From outside to in, clockwise, is T1, T2, T3, T7, T8, T9, T4, T5, T6. You can connect them for a delta start or a wye start. The delta connected motor will possess three sets of three leads with continuity between them.