Thanks for contributing an answer to Electrical Engineering Stack Exchange! 2 & 5 will show strong deflection. Mark this set 3 and 6. T2–White . To locate leads 1&4, Flash 8&9 as illustrated. Find lead #3 by looking for a positive deflection on one of the other pairs. The deflection occurs when the battery is connected. Connect the minus of the battery to both of the two of the leads from group #1 which are not labeled. Last step is to determine which is #4 and #9. 2. I still have no luck. Look for the largest deflection between lead #3 and the other two wires. --WYE CONNECTION— You will also a sensitive ohm meter. Find the lead that is commonly the lowest reading between the two and that will labeled either 1,2 or 3. You will Need: Analog volt meter; 6 or 9 volt battery; Tape to label leads; Link to Augie Hand’s “Identifying Unmarked Leads” Single Phase Motors have a wide range of applications both domestic and industrial. Why did DEC develop Alpha instead of continuing with MIPS? Finally move batter to 8-9 pair with + lead on #8 and negative flashed to #9. When single-phase motors use lead colors instead of letter and number markings to identify the leads, the color assignment shall be determined from the following:* T1–Blue . Move the battery to the 7-9 leads with positive the #9 lead and negative on the #7 lead. Identifying 9 unmarked leads of three-phase motors. Label the combination of three 7, 8, and 9. This is the internal WYE connection. To identify 1 & 4 connect the + terminal of the battery to 7. Positive deflection on the meter will identify #2 lead and the other is #5. You will be flashing the positive battery lead to the other lead which should be labeled #1. The wire with the largest deflection will be #4. Usually six terminals from the three phases of an induction motor are available. Pay attention to which leads are positive and negative on the meter and the battery. To locate leads 1 & 4, flash 8 & 9. Identify unmarked leads on a 9 lead motor, Podcast 293: Connecting apps, data, and the cloud with Apollo GraphQL CEO…. The other lead in the group will be #5. Doing a quick google search found this schematic. This is easy, using a multimeter. In addition, note that the common lead in this type of motor is usually white or purple. {Note that this will only work with an A.C. supply, not D.C.}. To identify 3 & 6: connect the voltmeter leads to 3 & 6 connect the – battery terminal to 7 and flash the terminal to 9. rev 2020.12.10.38156, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Did something happen in 1987 that caused a lot of travel complaints? I would like to hook the motor up and test but have no idea what coil is what. You will need a 6 to 12V lantern battery. 1. Does a rotating rod have both translational and rotational kinetic energy? (989)922-0043 . T3–Orange . Why does arXiv have a multi-day lag between submission and publication? The + lead of the volt meter will be lead #1 and negative voltmeter lead will be lead # 4. For instance, check that a reading of -9.2 becomes 9.2. Connect your meter to one motor wire. The schematics above provided by Joshyp00 are helpful in determining the leads, but alone do not provide enough information to mark all 9 leads. If you locate 3 pairs with continuity and one combination of 3, this is a WYE configuration. All 9 leads motors are most commonly made for dual voltage application, this means that the motor was manufactured specifically for dual voltage operation which can be connected in either 220 volts or 440 volts configuration. An explanation of the unmarked lead test involves magnetic circuits and transformer theory. This article will address lead identification of three-phase motors with 9 leads, based on the premise that none of the leads are marked. Connect the motor in delta style using six cables or use a star-delta starter as power of motor dictates. Identify the nine motor leads as follows: T1 = i T2 = h T3 = f T4 = c T5 = b T6 = g T7 = a T8 = e T9 = d For low voltage (240 volt) operation, connect leads T4-T5-T6 together with a wire nut. Link to Augie Hand’s “Identifying Unmarked Leads” Contact RepairZone.com for further information – Buy, Exchange, Repair your Automation equipment, such as servo motors and electronics. How can we identify the motor with wires, whether it is a single or a three phase? Suppose we have a new Induction motor without any marking of the leads, then we need to identify its polarity before using it. I agree that no help was found here, but to ID unmarked leads on a three phase 12 lead motor is tough, its not in the electrical handbook. He'd often start his schematic explainations with: "this line I have here in my hand comes from Boulder Damn". Read the results on the tester, then repeat the same procedure with the other exposed wire lead. This step will require a volt-ohm tester. Step 3. How to filter paragraphs by the field name on parent using entityQuery? Augie Hands "Identifying Unmarked Leads-Y Connection" 1. You will be touching the battery between leads 8 and 9 (polarity not important on this step), and monitoring the voltage deflection on each of the other 3 pairs of wires, each in succession. Is XEmacs source code repository indeed lost? May 24, 2016. An explanation of the unmarked lead test involves magnetic circuits and transformer theory. One of the tips should touch the motor's case while the other touches one of the exposed wire leads. What keeps the cookie in my coffee from moving when I rotate the cup? Check all 9 leads to look for pairs that have continuity. Leads 1 & 4 will show with little or no deflection and leads 3 & 6 and 2 & 5 will show strong deflection. Use MathJax to format equations. Identifying unmarked wires 12 lead dual voltage motor Delta High Voltage . Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. If the reading is still negative, you may have a faulty multimeter. Figure 6.28 shows a single-phase magnetic circuit containing four poles. 9. Randomly plug two out of the eight leads into your driver until the motor shaft vibrates, that two lead … leads from the first test is the common. Quote: Originally Posted by Aabeck (Post 779705) For instance, check that a reading of -9.2 becomes 9.2. (6 lead). Motors can be wired delta or wye. Mark Lamendola. (6 lead). Rather than trying to figure out through hit and miss, you will be able to tell exactly which one is which. If you locate 3 pairs with continuity and one combination of 3, this is a WYE configuration. A megger is the best way to see if any of the leads show leakage to the frame of the motor. (Don't hold the meter leads with your fingers as you will get a resistance reading through your body). Finally move batter to 8-9 pair with + lead on #8 and negative flashed to #9. That lead will be #7. Keeping the battery the same as above, repeat the procedure for the other group. First identify combinations. Connect the volt meter between 1&4, swapping the leads in such a way as to get a positive deflection when the battery is connected (will go negative when removed). First identify combinations. In Brexit, what does "not compromise sovereignty" mean? What would be the most efficient and cost effective way to stop a star's nuclear fusion ('kill it')? Shortcircuited motorcycle alternator leads to RPM proportional losses? Nidec Motor Corporation trademarks followed by the ® symbol are registered with the U.S. Patent and Trademark Office. How can we identify the motor with wires, whether it is a single or a three phase? but do not turn on yet. I also need to establish wheather this is wires delta or Y. This is the internal WYE connection. First identify combinations. Obtain a LOW voltage A.C supply. Title: Microsoft Word - wye_connected motor sheet.docx Author: Dakota Krupp Created Date: 8/11/2011 11:47:49 AM Making statements based on opinion; back them up with references or personal experience. T8–Red . Typical Wiring Diagrams Always use wiring diagram supplied on motor nameplate CONNECTION DIAGRAMS (#Co Leads Part Winding) WEG Three Phase Motors Volts / 12 Lead / Part Winding 12 10 11 12 3 L1 L2 12 10 11 64 5 78 9 12 L1 L2 12 10 11 64 5 L1 L2 Starting Type ( Volts) Across Line Starting Type ( Volts) Soft. MathJax reference. How can I get better at negotiating getting time off approved? The magnetic lines of force of these poles will cut the conductors of… MOTOR WIRING DIAGRAM 466703 12 Lead, Single Voltage, Wye Start – Delta Run or Part Winding Start Revised: 1/8/2014 NIDEC MOTOR CORPORATION ST. LOUIS, MISSOURI. It only takes a minute to sign up. Now take the remaining two leads and mark them 5 and 2. Touches one of the leads, then we need to measure resistance on the correct wires identifying. As mentioned in step 7 to identify its polarity before using it industrial. Of 6-lead motors with 1 or 4 by moving the battery is painted or taped in black 5. Other is # 5 remaining steps below are different, depending on whether you got. Star 's nuclear fusion ( 'kill it ' ) tests can be energized. Keeps the cookie in my coffee from moving when i rotate the cup similar device DC, more... Here: we would love to hear your thoughts i rotate the cup only! 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