Bill Remove or open any caps that cover the battery terminals, which are the studs sticking up from the top of the battery. Ideally the test should be done phase to ground and phase to phase but, of course, phase to phase is not possible if you only have 3 wires from the motor. How do I find the common in a single-phase motor? To create this article, 23 people, some anonymous, worked to edit and improve it over time. Step 3 Place one of the Megger leads on the end of either of the wires, and place the other Megger lead anywhere on the motor's housing to evaluate grounding continuity. wikiHow is where trusted research and expert knowledge come together. When a motor fails, it is often difficult to see why it failed just by looking at it. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. And here are some tips that will help. There are several types of bearings used. I found out my windis are not da same while doing continuity test with my meter. One of them is probably open. An obvious example of a 12 volt battery is found in an automobile, where it is used to turn the starter, which in turn, allows the car to start up. Your question actually refers to the supply of power to the motor, which could be corded, hardwired, and has factors such as gauge and length. l1 l2 l3 y start 12 lead motor run 123 789 645 12 10 11 789 456 12 10 11 123 l1 l2 l3 123 789 645 12 10 11 789 456 12 10 11 123 l1 l2 l3 l1 l2 l3 h i g h v o l t a g e l o w v o l t a g e p1 p2 g connection diagram thermal protection ground (green) 64 5 123 l1 l2 l3 6 lead motor 123 l1 l2 l3 64 5 s t a r t y r u n full voltage across the line start and run on connection. For a 480v motor, the test voltage should be 1000v and expect a reading of better than 2M Ohms. )First you should put on safety glasses and shut all electrical connections to the motor. To do this for delta connected 9-lead motors, remove the wire-nuts from 4 and 7, 5 and 8, and 6 and 9. References. Observe multi-meter/ electrical tester for any output of sound. http://www.uesystems.com/news/the-50-failure-modes-of-electric-motors, https://www.vfds.com/blog/how-to-read-a-motor-nameplate, https://www.fluke.com/en-us/learn/best-practices/motors-and-drives/troubleshooting-motor-bearing-wear, https://www.machinedesign.com/motorsdrives/trouble-shooting-bearing-currents, https://www.accelix.com/community/preventive-maintenance/typical-causes-of-electric-motor-winding-failures-and-how-to-prevent-them/, https://www.groschopp.com/how-to-check-a-motor-armature/, http://www.tigertek.com/servo-motor-resources/check-spindle-motor-windings.html, https://sciencing.com/troubleshoot-electric-motor-capacitor-problem-8001821.html, https://motorimpex.ua/files/downloads/MPFiltri_LMG.pdf, https://www.powertransmissionworld.com/is-your-electric-motor-trying-to-tell-you-something/, https://electrical-engineering-portal.com/7-most-common-motor-enclosure-types-defined-by-nema-standards, consider supporting our work with a contribution to wikiHow, Darkened paint in the middle of the motor (indicating excessive heat), Evidence of dirt and other foreign matter having been pulled into the motor windings through openings in the housing, Manufacturer's Name — the name of the company the made the motor, Model and Serial Number — information that identifies your particular motor, RPM — the number of revolutions the rotor makes in one minute, Horsepower — how much work it can perform, Wiring diagram — how to connect for different voltages, speeds and direction of rotation, Frame Style — physical dimensions and mounting pattern. Type — describes if frame is open, drip proof, total enclosed fan cooled, etc. You will now place the red probe on the common wire. Test that the meter is working properly by touching these two leads together - the screen should read zero ohms (or full continuity). Electric motors have had a reputation for being a mix of science and magic. Placing the test probes on the capacitor terminals, the resistance should start low, and gradually increase as the small voltage supplied by the meter's battery gradually charges the capacitor. The best answer I can give is to follow the instructions supplied with the motor. If not, they could be skipping across high spots on the commutator. If my table saw has an sgv motor and the shaft has a problem rotating, should I take the ends off and look inside? Another type of 12 leads wiring configuration which is a distinguished counterpart to the star (wye) motor connection is the delta configuration. If it's a single-phase type, you just need to move L1 (the only phase) between the 02 leads of the capacitor. 3 Phase motors are usually additonally protected by a thermal overload relay or electronic equivalent which is much more accurate and the same device can be used for single phase if desired. Therefore, to test the voltage of a 12 volt motor, you would test the source, i.e., the 12 volt battery, or the leads coming into the motor to ensure proper current. If it has bronze sleeve bearings (rather than ball bearings) the bearings are out of oil and have seized up. All tip submissions are carefully reviewed before being published. If the motor is kept in a place with high humidity, a periodical inspection is necessary. At no time during the motor check out is power required. Values measured in this phase of testing should be around fifteen ohms. A motor placed in storage may or may not work, regardless of its physical appearance. Sounds like you have a winding down to ground. These motors should not have these openings blocked or restricted and should not be installed in wet, dirty or dusty areas. Assortment of weg 12 lead motor wiring diagram. Club Car Regen Motor. My table saw motor has an inconspicuous built in circuit breaker button that tripped on low voltage/high load. Select DC current on your voltmeter, and if there's a scale, choose 12 volts. You will be able to find the layout one google. So when a motor fails to operate it may not be obvious what the problem is. In fact, it takes many years of experience to determine whether a motor is … Now I had to balance the windings, I … If it is go directly to the motor and disconnect from cable and check motor and the cable separately. Locate the wires coming into the motor. The ends of the motor have rather large openings and the windings in the stator windings are plainly visible. Often it is required to test the winding of the 3 phase windings with the aid of a multimeter or ohmmeter to determine whether the motor is still good or burnt or shorted. The capacitor will have to be allowed 10 or more minutes to discharge before attempting this test again. A wiring diagram is a streamlined standard photographic depiction of an electric circuit. Check them out here! MCBs should be of type C or D to allow for inrush current, and the Z ratings of the circuit must be below the specified threshold in your locality for the rating of the overcurrent device. Test the lead. At 20 October 2014, 18:05:29 user sahil wrote: [reply @ sahil] undoubtly good article. Check from phase to phase (U to V, V to W, W to U). Read the voltmeter's display. Low, single digit resistance values are expected. Be sure to make sure leads on both ends are not touching anything including the other leads. Note: Furnished upon request only. also … Surge test each set of 3 leads separately. At the same time, touch the black, positive (+) wire of the voltmeter to the black, positive terminal of the battery. For example use a red wire nut to connect two 12 gauge wires. 9 being more common. You can find that by checking the ohms between the motor terminals, if shorted or not . Minimum test value of motor insulation resistance is 1 Meg Ohm (1 MΩ). Turn the rotors and push and pull the shaft to test the bearings; if the rotors move smoothly and there is little to no movement in the shaft, the bearings are probably fine. 12 leads 3 phase high volts delta connected wiring configuration diagram electrical schematic diagram of a delta configured 12 leads motor so connected A lternatively, discover how to power your home with Solar and Wind Energy! If it's a 3-phase motor, you have to swap only two phases. After a … How to Test the Winding of a 3 phase Motor. Addict. Any value less than about 0.2 mega ohms is a reason to discard the motor. Test the fourth set of wires: Therefore, to test the voltage of a 12 volt motor, you would test the source, i.e., the 12 volt battery, or the leads coming into the motor to ensure proper current. Two popular types are brass sleeve bearings and steel ball bearings. A quick check-out can be done with a simple ohm meter, but there's a lot more information to collect and weigh before actually putting it to use. Most servo motor shorts can be read with a regular quality meter. (More advanced testing requires specialized tools. Electrically checking a capacitor can be done with the ohm meter. Remove the leads from the motor with the flathead screwdriver. Touch the red probe of the voltmeter onto the post where the red wire is connected. It is practically impossible to determine rules for the actual minimum insulation resistance value of a motor because resistance varies according to method of construction, condition of insulation material used, rated voltage, size and type. Turn off the car and anything that draws current from the battery, such as a dome or hood light, which turns on when the door or hood is open. 6.18). If there is NO speed sensor lead on the motor, then it is a Series motor. ... Trolling motor batteries give out after 2 hours but batteries still charge up to 13 v. ... As soon as i went to start it nothing no lights or anything .tested it showed 0 volts removed cables it showed … My electric motor only runs when it's not grounded. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Sometimes the trouble lies within the power supply, including branch circuit conductors or motor controller. If there is any reading on any of these then the motor is bad, do not use it. The previous article presented the terminal wiring connection for a 12 leads star (wye) configured induction motor. The following diagram illustrates these connections graphically: You can use a multimeter to check 12-volt car's battery if you have problems. This ... for delta and wye 9-lead motors. This article has been viewed 1,148,248 times. Be sure to label the leads for the same direction of … And here are some tips that will help. It should provide voltage tables matching the correct color codes and / or jumper settings for voltage selection. If the motor itself has developed a fault, the fault may be a burnt wire or connection, a winding failure includin… Donater. What could be the problem? Do you have same information for 12 lead 3 phase motor? Touch one lead to each motor power lead and the other to the metal motor casing. 12 lead out motor is generally with two different set of winding usually for double speed application. Tech. The voltmeter will show a strong deflection on two of the pairs and little or no deflection on one pair (Fig. If the motor has any of the following issues on the outside, they may be problems that can shorten the life of the motor because of previous overloading, wrong application, or both. Again this type of connection will also have 12 wiring terminals directly accessible from the motor's terminal box which serves for … By using our site, you agree to our. It doesn't happen often - but it does happen. Set the voltage setting of the insulation resistance tester to 500V. Make sure your hands are not touching the metal probe tips, as doing so will cause the reading to be inaccurate. If leads are numbered 1 to 12, the motor is typically rated for two voltages and could be used with a wye-delta starter at either voltage, or a part-winding starter for low voltage only. What should I test if my fan only works on low speed whether the switch is low or high, and the capacitor tests are fine? At 12 October 2014, 1:54:44 ... At 17 September 2014, 1:07:57 user bulelani wrote: [reply @ bulelani] I was doing my trade test, motor test task. This article has been viewed 1,148,248 times. Drip-proof motors can be installed in damp or wet locations, so long as they are installed in such a way that water (and other liquids) can not enter due to gravity and must not be subjected to a stream of water (or other liquids) directed at or in it. Looks like a standard 9 lead motor with the internal Y brought out as 10,11,12 so it can be connected as a Y or delta. 4. Check for shorts between the power wiring and ground. Note: a 9-wire motor can only be connected in a Wye configuration, whereas a 12-wire motor can be connected in either a Wye or Delta configuration. If the surge test pattern for each 3-lead circuit has two “good” patterns and 1 “bad” pattern, the motor has an ... winding as 11-12-13. All motors should be protected by an overcurrent device (MCB) in the consumer unit, and a residual current device (RCD or GFCI). From this Time and Resistance, measure the Capacitance and compare it with the value printed on the capacitor. Read the results on the tester, then repeat the same procedure with the other exposed wire lead. The 3 phase ac source line voltage l1 is connected to the motor terminals 1 12 line … If it stays shorted or does not rise, there is probably an issue with the capacitor and may need to be replaced. Take the cover from the off using a flathead screwdriver. If the problem seems to be electrical, use an ohmmeter to check resistance value. Are there 2 smaller diameter (1/4-20 UNC) terminals and 2 larger diameter (5/16-18 … ", not all motors are the same. To check an electric motor to see why it failed, look at the outside for signs of debris that has been sucked into the motor windings, as well as broken mounting holes or feet, and darkened paint that could indicate excessive heat. To determine whether a 3 phase motor is still good or has gone bad, a … There are typically two, although there may also be a ground wire. Check that the brush springs still have enough tension to hold them securely to the commutator. The pair with little FIGURE 6.17 Identifying the circuits of a nine-lead wye-connected motor with unmarked leads. What we're dealing with here with a lead acid battery is a plastic box that encases a delicate balance of chemicals which are ready to interact with each other to produce electricity when the load is applied. But it is important to take safety precautions associated with handling lead batteries and also wear protection for your eyes. Another convention of wiring connection for the AC induction motor apart from the 9 leads and the widely known 6 leads terminal is the 12 leads motor wiring connection. A fully-charged car battery should read 12.6 volts at room temperature. Expect to see a very low value of resistance in ohms. Check the outside of the motor. For information on how to check the fan and the bell housing, read on! Both 9-wire and 12-wire motors can be connected for high- or low-voltage … A lead Wye Start/Delta Run Motor has the ability to meet several starting Wye Delta Starter or by a series of contactors in a control circuit. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, My Auto Repair Advice: If Your Car Wont Start Then Keep Reading to Find Out Why, AA1 Car: Diagnosing A Car Battery That Runs Down. TEFC motors on the other hand, can be used in all the previously mentioned areas but must not be submerged unless designed specifically for the purpose. I need wiring diagrams for 3 phase 240480v 12 lead 75 hp ac industrial motors. See how to measure insulation resistance of Electric Motor Running Amps Test If a multimeter shows continuity between leads 7, 8, and 9, the machine is wye-connected (see Fig. Check from phase to motor frame (earth) (U to E, V to E , W to E ). This article introduces a set of proce-dures for identifying unmarked leads of 6-lead motors with 1 or 2 wind- ... part-winding start or a 2-winding motor. Place tip of red test lead into electrical connector and the tip of black test lead onto the any pin of the plug. identifying unmarked motor leads. To create this article, 23 people, some anonymous, worked to edit and improve it over time. You may find that when it runs ungrounded that the casing becomes live at up to supply voltage. Possible layout of windings: 1 & 4 Both are cut 2 & 5 You have 2 & 5 3 & 6 You have 1 lead 7 & 10 "8 & 11 "9 & 12 "If 2-5 is a winding, use the procedure in your first post to figure out the rest. T2 is paired with T5 and T8. This is a short instructional clip describing how to check winding resistance on a 230/460 volt, 3 phase, 60 Hz, 9 lead motor. With a multimeter set to low ohms (usually 200), test between each winding terminal and the metal casing of the motor. At first look, this may seem to be an oxymoron, but it really isn't. to reverse direction of rotation, interchange leads l1 & l2. The most common failure mode of a 3 phase AC motor is burnt winding or shorted winding leading to the damage of the motor. Select ohms resistance on the multi-meter and set for the 30,000-ohm range. How can I check for the cause? This step will require a volt-ohm tester. Speed: Single Phase: 3 Typical Voltage: Dual 230/460 Winding: "Y" Start: "Delta" Run Special Feature: 12 Leads. For information on how to check the fan and the bell housing, read on! With the negative black multimeter test lead still on the brown wire, take the red test lead and take it off of the white wire. Star config for one voltage and Delta for the other. My electric chainsaw motor still runs, but sparks and heat are coming from the brushes and commutator. The caps usually just clip in place. Take the ends off, clean out the bearings with steel wool, polish the shafts with fine emery cloth, oil up the lubricating felts and put it back together. Either if end of the wire at the open point - or if some melted copper wire should encounter the motor frame or other grounded part of the motor - a "short circuit" results. In addition, the 12-lead motor requires connecting wire-nut 10, 11, and 12 together. … T1 is usally paired with T4 and T7. I was runing a 240v 2kw motor off a faulty generator which I now know was producing less than 240v. Cold weather can cause the reading to be slightly lower, even on a full charge. Values greater than this indicate a potential problem and values significantly greater than this indicate the winding has failed opened. Name: 3 phase motor wiring diagram 12 leads – 3 Phase 6 Lead Motor Wiring Diagram Elegant Awesome 12 Lead 3 Phase Motor Wiring Diagram Electrical; File Type: JPG; Source: thespartanchronicle.com; Size: 1.35 MB; Dimension: 3229 x 2480 At the same time, touch the black probe of the voltmeter onto the post where the black wire is connected. Last Updated: March 29, 2019 A motor with high resistance will not run - or not run with speed control (as is the case when a 3-phase motor winding opens while running). You can use a multimeter to check 12-volt car's battery if you have problems. Do the following with the motor disconnected. What are the first things to check for repair? 1). Check across all three (two-lead) sets with the voltmeter while flashing T9. One of the tips should touch the motor's case while the other touches one of the exposed wire leads. Verify what you have! It took me a long time to find it. However, if you are actually asking, "How do I connect the wires in a motor? Generally, a 12 lead motor is a dual voltage motor. This results in a broken path - or "open circuit". Admin. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Another possibility is that the driven load is jammed, binding or mismatched. T3 is paired with T6 and T9. If there are more than two, look for the black and red wires. Your tester will have two wires with lead tips. 561: 100: 2: 9: Dec 18, 2018 #5 How to tell the difference between a Series and a Regen cart. A 12 volt motor transforms electrical energy from a 12 volt battery into mechanical energy to perform work. It reveals the elements of the circuit as simplified shapes, as well as the power and also signal connections in between the tools. They are generally held to a standard. We use cookies to make wikiHow great. Check them out here! Look for that first. Open motors are, as the name implies, completely open. But perhaps crash test dummy has a better idea? Touch the red, negative (-) wire of the voltmeter to the red, negative terminal of the battery. It really shouldn't matter, an AC single-phase motor can be connected either way. How do I reverse the direction the motor runs? This can be determined directly by counting the number of available terminal leads accessible from the induction motor's terminal box. Hold the bare ends of the conductors together and twist on a wire nut. When an electric motor fails to start, runs intermittently, runs hot, or continually trips its overcurrent device, there my be a variety of causes. Include your email address to get a message when this question is answered. Make sure you use quality meter going up to at least 10megohms. Crash Test Dummy Dazed and Confused. Testing a three-phase electric motor without a trip down to the repair shop requires a cautious approach, but happily all you need to start with is a volt-ohmmeter and some simple hand tools. There are 11 references cited in this article, which can be found at the bottom of the page. Thanks to all authors for creating a page that has been read 1,148,248 times. Sometimes, however, it is difficult to know if a problem exists in the battery, starter or somewhere else, so you need to test the battery to be sure. How do I check and find out with a multi-meter whether a motor is faulty or not? It depends on the voltage supply, such as 110v or 220v. The most accurate way to test your battery is with a voltmeter. Those are described below. Since you’ll be testing the motor only, it’s best to first remove … The motor (Makita mitre saw) stopped working with no obvious smoke or smell. An example could be an "open" circuit caused by an electrical failure caused by a foreign object that falls into or is drawn magnetically into the motor or excessive voltage that literally causes a wire in the winding to "blow up" or melt. Knowing some basic methods and techniques along with having a few test instruments handy helps detect and diagnose problems with ease. After that, get out your ohm meter and start checking the windings for an open coil. 12 Leads. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/b\/b4\/Check-an-Electric-Motor-Step-1-Version-5.jpg\/v4-460px-Check-an-Electric-Motor-Step-1-Version-5.jpg","bigUrl":"\/images\/thumb\/b\/b4\/Check-an-Electric-Motor-Step-1-Version-5.jpg\/aid875714-v4-728px-Check-an-Electric-Motor-Step-1-Version-5.jpg","smallWidth":460,"smallHeight":345,"bigWidth":"728","bigHeight":"546","licensing":"