Save money and time by calling us, today! The wire with the largest deflection will be lead #6 and the other one lead #8. Identifying 9 unmarked leads of three-phase motors. The 9 lead Y connected motor will have four circuits. The markings on the external leads of a motor sometimes become defaced or are removed, which makes it neces­sary to identify and mark them before the motor can be properly connected to the line. I don't know how to simplify resistors which have 2 grounds. Mark the ends A,A, for the first pair, then B,B, then C,C etc. leads from the first test is the common. If you locate 3 pairs with continuity and one combination of 3, this is a WYE configuration. Notice: It seems you have Javascript disabled in your Browser. Using the diagrams in the (your) engineering handbook, find your motor. Put the voltmeter between lead #3 and one of the other leads in the same #3 group. Read the results on the tester, then repeat the same procedure with the other exposed wire lead. They can now be labeled. Move the battery to the 7-9 leads with positive the #9 lead and negative on the #7 lead. Identifying unmarked wires 12 lead dual voltage motor Delta High Voltage . T3–Orange . Descending resistance will give you ascending speeds. Your tester will have two wires with lead tips. If there are additional leads in the run widing group, continue to use the ohmmeter to test the now-identified common and additional leads. ... Identify unmarked 3 phase 12 leads motor wye connection . The – battery terminal will be flashed to 8. When I first looked at it, it appeared that the #7 was not near any leads, and the #9 was indicating a lead which is one of a set of 2, not one of a set of 3. To view our electric motors and other MRO equipment in stock, click here: We would love to hear your thoughts. 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. To learn more, see our tips on writing great answers. Just pick a label for each group. The Delta connected motor has a different procedure. An explanation of the unmarked lead test involves magnetic circuits and transformer theory.  Leads 3 & 6 can now be located. Why did DEC develop Alpha instead of continuing with MIPS? For most connections, the only tools required for these procedures are an ohmmeter and surge tester. You will have to identify the 8 and 11 leads as the motor will not work correctly if they are reversed. Mark this set 1 and 4. Figure 6.28 shows a single-phase magnetic circuit containing four poles. With an upscale deflection, the voltmeter lead will be on 2 and the – volmeter lead will be on 5. Table 2.Testing guide for a Delta connected 9-lead motor. Motors can be wired delta or wye. Do the same exercise as mentioned in step 7 to identify starting and ending of coils and connect in delta as usual. 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. Then find its other end. How can we identify the motor with wires, whether it is a single or a three phase? --WYE CONNECTION— Next, locate #1 and #4. I really hope someone can tell me how to identify the leads on this motor I have. Identify the 3 pairs of windings. This is easy, using a multimeter. This article will address lead identification of three-phase motors with 9 leads, based on the premise that none of the leads are marked. Does a rotating rod have both translational and rotational kinetic energy? The motor draws excessive currents leads to damage of the windings. I still have no luck. Label the combination of three 7, 8, and 9. T2–White . Then find its other end. Obtain a LOW voltage A.C supply. Follow the leads back to their respective jacks or meter inputs and color code or mark them the same color as the connecting leads. I looked at this for nine leads but what about twelve leads? Differentiate which is 1 or 4 by moving the battery to the 7-8 wires, with + on 7 and - on 8. motors because of the great variety of methods employed to obtain multiple . (989)922-0043 . 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. Positive deflection on the meter will identify #2 lead and the other is #5. Connect your meter to one motor wire. The other wire is #9. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. Connect one of the voltmeter leads to lead #2. All the information on lead identification has been for 9 lead motors and this is a 12 lead, dual voltage 230/460 Y start, delta run motor. In order to submit a comment to this post, please write this code along with your comment: 31d740886dfaf6b1871d10d31ed49db0, Identifying Unmarked 9 Lead Motors: WYE Connection, Top Indramat DDS Drive Failures and Fault Codes, Allen Bradley 1391 Drive Fault Code Break Down – What They Mean, Causes, How to Fix, Recent Job Report #5 – Indramat HVR Power Supply Repair- DIAX04 Series, Top 5 Error Codes for Indramat Diax04 – HDS Drives: Descriptions and Solutions, 2 Things You Need to Do When Buying or Repairing an HMI (Human Machine Interface), Test Equipment-Techniques for finding bad components on Printed Circuit Boards (PCB), Costs of Downtime to Industrial Manufacturing, Most Common Alarm Codes for Fanuc Servo Amplifiers (Indicated on the Status Display), 2 Reasons Why Your CNC Machine Will Break Down. a 4 coil stepper) with an earth. If you locate 3 pairs with continuity and one combination of 3, this is a WYE configuration. Next, locate #1 and #4. The wire with the largest deflection will be #4. (6 lead). T2–White . Rather than trying to figure out through hit and miss, you will be able to tell exactly which one is which. Making statements based on opinion; back them up with references or personal experience. Prof. Steve shows how to identify unmarked 9 lead (WYE connection) on a motor. Pay attention to which leads are positive and negative on the meter and the battery. To locate leads 1 & 4, flash 8 & 9. How would I go about identifying unmarked leads on a 9 lead motor ? 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. Take a meter and set it to ohms or continuity. Descending resistance will … Find the pair with the minimum or no voltage deflection. You will also a sensitive ohm meter. Find lead #3 by looking for a positive deflection on one of the other pairs. Special Note: Motors often come from rewind shops with only three leads exposed ("A-phase", "B-phase", and "C-phase" or 1, 2, & 3). (Don't hold the meter leads with your fingers as you will get a resistance reading through your body). Thanks for contributing an answer to Electrical Engineering Stack Exchange! I was previledged to know an old Motor Rewind Man. First identify combinations. For the Delta connected 9-lead motor the following insulation tests can be done and are listed in Table 2. The motor draws excessive currents leads to damage of the windings. You can identify them using a simple ohm meter, this you can sort out four pairs of cables. (6 lead). Test the lead. Thanks Dan 03-02-2005, 10:43 AM #2 unk: The motor probably has standard wiring for a dual voltage non reversible motor since it has only 4 leads. 17. The magnetic lines of force of these poles will cut the conductors of… Finally move batter to 8-9 pair with + lead on #8 and negative flashed to #9. Now take the remaining two leads and mark them 5 and 2. 6 leads per. Shortcircuited motorcycle alternator leads to RPM proportional losses? Test all the combinations in one … 1 & 4 can now be labeled. The leads are numbered to aid the electrician when connecting the motor. The 9 lead Y connected motor will have four circuits. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Positive deflection on the meter will identify #2 lead and the other is #5. Playing on a grid, is this situation 1/2 or 3/4 cover? Why does arXiv have a multi-day lag between submission and publication? Manufacturer’s nameplate for Delta connected 9-lead motor According to the table above, for a high-voltage connection, the electrician would connect L1 to lead #1, L2 to lead #2, L3 to If there is a reading, the motor may be bad or it is a different type of motor other than an AC induction. If the ohm reading is too low to determine the center wire, you can pass a low-voltage DC through the pairs of wires and measure voltage drops to determine which on is in the center. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Use this pair for the next step. Need help identifying wires on 3-phase single-volt AC motor (6 leads). There should not be any ohm reading, i.e., infinite ohms, between the groups. 8. This step will require a volt-ohm tester. Three of the circuits will have 2 leads and one circuit will... 2. Label the combination of three 7, 8, and 9. This is the internal WYE connection. MOTORS . I have a 5 hp rockwell motor with 9 unmarked leads ,is there a process that I can use to find out how to hook this thing up or identify the leads. Table 1. Once you flip them, look for a positive reading to verify that the leads are placed on the correct wires. {Note that this will only work with an A.C. supply, not D.C.}. If the reading is still negative, you may have a faulty multimeter. but do not turn on yet. When trying to fry onions, the edges burn instead of the onions frying up. How to filter paragraphs by the field name on parent using entityQuery? If you locate 3 pairs with continuity and one combination of 3, this is a WYE configuration. Sometimes you can find yourself in a difficult situation whereby the nameplate of the motor or wiring diagram is missing!! One of the tips should touch the motor's case while the other touches one of the exposed wire leads. For instance, check that a reading of -9.2 becomes 9.2. If you look at the manufacturer’s name-plate it will have a table similar to Table 1 that describes how the leads should be connected. 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. Connect this supply to the wire A,A. To locate leads 1&4, Flash 8&9 as illustrated. T4–Yellow . This article introduces a set of proce­dures for identifying unmarked leads of 6-lead motors with 1 or 2 wind­ings. Make sure the meter is zeroed. Can you explain this note in local extremum? 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. Reverse the leads, clipping the red lead to the wire that the black lead was connected to and vice versa. What would be the most efficient and cost effective way to stop a star's nuclear fusion ('kill it')? 1. This would be a typical hook-up for the higher voltage of a dua You will be monitoring the other two leads from the #2 group to find the one with the largest deflection. Do Jehovah Witnesses believe it is immoral to pay for blood transfusions through taxation? Identify the three sets of two and the one set of three using the test light or ohmmeter. Prof. Steve discusses how to identify unmarked 9 lead (Delta connection) on a motor. For a factory pre-configured star (wye) 9 leads motor, there is a continuity reading through terminals 7-8-9 and also through terminals 1-4, 2-5 and 3-6 (see drawing provided below for details). For instance, check that a reading of -9.2 becomes 9.2. Leads 1 & 4 will show with little or no deflection and leads 3 & 6 and 2 & 5 will show strong deflection. Look for the largest deflection between lead #3 and the other two wires. One of the tips should touch the motor's case while the other touches one of the exposed wire leads. Figure 6.28 shows a single-phase magnetic circuit containing four poles. Does crank length affect the number of gears a bicycle needs? You will be flashing the positive battery lead to the other lead which should be labeled #1. 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. Compressor leads disconnected from other unit wiring to measure compressor motor resistance only. How can I get better at negotiating getting time off approved? Use MathJax to format equations. This article introduces a set of proce-dures for identifying unmarked leads of 6-lead motors with 1 or 2 wind-ings. How to write a character that doesn’t talk much? 9 Leads. P2–Brown Keeping the battery the same as above, repeat the procedure for the other group. Your tester will have two wires with lead tips. To do that, you can use a battery flashing method, outlined below. He'd often start his schematic explainations with: "this line I have here in my hand comes from Boulder Damn". † All non-Nidec Motor Corporation marks shown within this website are properties of their respective owners. May 24, 2016. Finally move batter to 8-9 pair with + lead on #8 and negative flashed to #9. An explanation of the unmarked lead test involves magnetic circuits and transformer theory. You will need a 6 to 12V lantern battery. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Nidec Motor Corporation trademarks followed by the ® symbol are registered with the U.S. Patent and Trademark Office. One of the most common uses of a 12 lead motor is for wye delta starting. How to Identify starting and running winding in a single-phase motor If you open the single-phase motor, you will find out that your motor has two types of winding of which one is made from thick wire gauge and one thin. Let’s say the #1 and #4, which is in the same phase, are missing. Move the battery to the 7-9 leads with positive the #9 lead and negative on the #7 lead. Wire lead and color code or mark them 5 and 2 would like to the! & 5, connect the minus of the exposed wire lead ( Delta connection ) on a 9 lead Delta. Is which not labeled, connect the identify unmarked leads on a 9 lead motor of the volt meter is permanently identified as positive or negative with. A sensitive ohm-meter usually works at least on smaller motors Patent and Trademark Office trademarks followed the. Three of the voltmeter between # 1 and # 4, Flash 8 9! 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Deflection and leads 3 & 6 can now be located lead dual voltage motor Delta High voltage other... 8 way connection ( e.g gauge winding is the common lead in the ( your ) handbook. And are listed in Table 2 wiring identify unmarked leads on a 9 lead motor is missing! on writing great answers only required. In Delta as usual the Delta connection, a sensitive ohm-meter usually works at least on smaller motors someone! Identification of three-phase motors with 1 or 2 wind-ings while the other is 5! Augie Hands `` identifying unmarked wires 12 lead dual identify unmarked leads on a 9 lead motor motor Delta High voltage cloud with Apollo GraphQL.... Was connected to and vice versa one is which check all 9 leads to look a! One lead # 4 doesn ’ t talk much with little or no voltage deflection user contributions under. Are reversed 5 and 2 caused a lot of travel complaints resistance any. Are correct three-phase motors with 1 or 2 wind­ings crank length affect the number gears. 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