Test that the meter is working properly by touching these two leads together - the screen should read zero ohms (or full continuity). Another possibility is that the driven load is jammed, binding or mismatched. A fully-charged car battery should read 12.6 volts at room temperature. This ... for delta and wye 9-lead motors. Test the fourth set of wires: We use cookies to make wikiHow great. 9 being more common. I need wiring diagrams for 3 phase 240480v 12 lead 75 hp ac industrial motors. Include your email address to get a message when this question is answered. Locate the wires coming into the motor. If there is any reading on any of these then the motor is bad, do not use it. 6 lead connection is to enable star delta starter. 4. This article has been viewed 1,148,248 times. 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. 561: 100: 2: 9: Dec 18, 2018 #5 How to tell the difference between a Series and a Regen cart. 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. If my table saw has an sgv motor and the shaft has a problem rotating, should I take the ends off and look inside? And here are some tips that will help. Are there 2 smaller diameter (1/4-20 UNC) terminals and 2 larger diameter (5/16-18 … thank you. Make sure you use quality meter going up to at least 10megohms. The pair with little FIGURE 6.17 Identifying the circuits of a nine-lead wye-connected motor with unmarked leads. Addict. There are 11 references cited in this article, which can be found at the bottom of the page. How can I check for the cause? If the motor is kept in a place with high humidity, a periodical inspection is necessary. A 12 volt motor transforms electrical energy from a 12 volt battery into mechanical energy to perform work. The capacitor will have to be allowed 10 or more minutes to discharge before attempting this test again. There are several types of bearings used. Select DC current on your voltmeter, and if there's a scale, choose 12 volts. 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. The following diagram illustrates these connections graphically: It reveals the elements of the circuit as simplified shapes, as well as the power and also signal connections in between the tools. Set the voltage setting of the insulation resistance tester to 500V. Bill Remove or open any caps that cover the battery terminals, which are the studs sticking up from the top of the battery. 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. 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. Another type of 12 leads wiring configuration which is a distinguished counterpart to the star (wye) motor connection is the delta configuration. Select ohms resistance on the multi-meter and set for the 30,000-ohm range. Turn on the power supply and measure the time taken for the capacitor to charge to 63.2% of the supply voltage.For example, if the supply voltage is 12V, then 63.2% of this is around 7.6V. Generally, a 12 lead motor is a dual voltage motor. Hold the bare ends of the conductors together and twist on a wire nut. 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. 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. {"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":"

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\n<\/p><\/div>"}. Either 9 leads or 12 leads. Make sure your hands are not touching the metal probe tips, as doing so will cause the reading to be inaccurate. How do I reverse the direction the motor runs? I was runing a 240v 2kw motor off a faulty generator which I now know was producing less than 240v. My electric motor only runs when it's not grounded. Note: Furnished upon request only. Last Updated: March 29, 2019 Check across all three (two-lead) sets with the voltmeter while flashing T9. Take the cover from the off using a flathead screwdriver. If it's a single-phase type, you just need to move L1 (the only phase) between the 02 leads of the capacitor. What are the first things to check for repair? At the same time, touch the black, positive (+) wire of the voltmeter to the black, positive terminal of the battery. Assortment of weg 12 lead motor wiring diagram. 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. If it's a 3-phase motor, you have to swap only two phases. 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. Any value less than about 0.2 mega ohms is a reason to discard the motor. You will now place the red probe on the common wire. When an electric motor fails to start, runs intermittently, runs hot, or continually trips its overcurrent device, there my be a variety of causes. If the motor itself has developed a fault, the fault may be a burnt wire or connection, a winding failure includin… Both 9-wire and 12-wire motors can be connected for high- or low-voltage … Your tester will have two wires with lead tips. And here are some tips that will help. But it is important to take safety precautions associated with handling lead batteries and also wear protection for your eyes. If it has bronze sleeve bearings (rather than ball bearings) the bearings are out of oil and have seized up. Read the voltmeter's display. Expect to see a very low value of resistance in ohms. The caps usually just clip in place. Touch one lead to each motor power lead and the other to the metal motor casing. If it is connected - disconnect it before attempting the steps below. 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. Remove the leads from the motor with the flathead screwdriver. The previous article presented the terminal wiring connection for a 12 leads star (wye) configured induction motor. 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 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. It really shouldn't matter, an AC single-phase motor can be connected either way. … Donater. You can use a multimeter to check 12-volt car's battery if you have problems. Admin. Do the following with the motor disconnected. It doesn't happen often - but it does happen. 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. Fixed appliances should ideally be on their own circuit with the MCB sized to suit the appliance. It should provide voltage tables matching the correct color codes and / or jumper settings for voltage selection. 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. Two popular types are brass sleeve bearings and steel ball bearings. Sometimes the trouble lies within the power supply, including branch circuit conductors or motor controller. This can be determined directly by counting the number of available terminal leads accessible from the induction motor's terminal box. Now I had to balance the windings, I … Get out your ohmmeter, open up the fan, and check the continuity of all of the coils in the fan motor. You can use a multimeter to check 12-volt car's battery if you have problems. Values greater than this indicate a potential problem and values significantly greater than this indicate the winding has failed opened. For a 480v motor, the test voltage should be 1000v and expect a reading of better than 2M Ohms. 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. Cold weather can cause the reading to be slightly lower, even on a full charge. 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 wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To do this for delta connected 9-lead motors, remove the wire-nuts from 4 and 7, 5 and 8, and 6 and 9. also … This step will require a volt-ohm tester. 3 phase motor wiring diagram 12 leads sample how to check polarity of each winding in 3 phase motor. % of people told us that this article helped them. To determine whether a 3 phase motor is still good or has gone bad, a … 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. Star config for one voltage and Delta for the other. Check that the brush springs still have enough tension to hold them securely to the commutator. 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. Check from phase to motor frame (earth) (U to E, V to E , W to E ). Do you have same information for 12 lead 3 phase motor? Look for that first. 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. A wiring diagram is a streamlined standard photographic depiction of an electric circuit. Verify what you have! After that, get out your ohm meter and start checking the windings for an open coil. You can find that by checking the ohms between the motor terminals, if shorted or not . Knowing some basic methods and techniques along with having a few test instruments handy helps detect and diagnose problems with ease. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Again this type of connection will also have 12 wiring terminals directly accessible from the motor's terminal box which serves for … How to Test the Winding of a 3 phase Motor. My electric chainsaw motor still runs, but sparks and heat are coming from the brushes and commutator. It took me a long time to find it. Be sure to label the leads for the same direction of … One of them is probably open. At the same time, touch the black probe of the voltmeter onto the post where the black wire is connected. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. 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? How do I check and find out with a multi-meter whether a motor is faulty or not? My table saw motor has an inconspicuous built in circuit breaker button that tripped on low voltage/high load. One of the tips should touch the motor's case while the other touches one of the exposed wire leads. ", not all motors are the same. If a multimeter shows continuity between leads 7, 8, and 9, the machine is wye-connected (see Fig. What could be the problem? To effectively test the motor, you must disconnect the field coils where possible. There are typically two, although there may also be a ground wire. Minimum test value of motor insulation resistance is 1 Meg Ohm (1 MΩ). 1). A motor placed in storage may or may not work, regardless of its physical appearance. This results in a broken path - or "open 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. What is the best reliable device to use for protecting the motor against over-current? It depends on the voltage supply, such as 110v or 220v. 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. 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. Many have fittings for lubrication while others are permanently lubricated or "maintenance free". To create this article, 23 people, some anonymous, worked to edit and improve it over time. Crash Test Dummy Dazed and Confused. Check them out here! Many digital meters do not offer the ability to zero, so skip the "zeroing" information above if yours is a digital meter. 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. When a motor fails, it is often difficult to see why it failed just by looking at it. Electric motors have had a reputation for being a mix of science and magic. 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. Type — describes if frame is open, drip proof, total enclosed fan cooled, etc. Thanks to all authors for creating a page that has been read 1,148,248 times. Surge test each set of 3 leads separately. T2 is paired with T5 and T8. If it stays shorted or does not rise, there is probably an issue with the capacitor and may need to be replaced. Values measured in this phase of testing should be around fifteen ohms. 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. 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. I found out my windis are not da same while doing continuity test with my meter. So when a motor fails to operate it may not be obvious what the problem is. For example, a fully-charged battery should read 12.5 volts at zero degrees Fahrenheit. Read the results on the tester, then repeat the same procedure with the other exposed wire lead. T1 is usally paired with T4 and T7. If there are more than two, look for the black and red wires. If it is go directly to the motor and disconnect from cable and check motor and the cable separately. The ends of the motor have rather large openings and the windings in the stator windings are plainly visible. From this Time and Resistance, measure the Capacitance and compare it with the value printed on the capacitor. Most servo motor shorts can be read with a regular quality meter. If not, they could be skipping across high spots on the commutator. 6.18). All motors should be protected by an overcurrent device (MCB) in the consumer unit, and a residual current device (RCD or GFCI). Since you’ll be testing the motor only, it’s best to first remove … They are generally held to a standard. See how to measure insulation resistance of Electric Motor Running Amps Test 12 Leads. How do I find the common in a single-phase motor? The 3 phase ac source line voltage l1 is connected to the motor terminals 1 12 line … References. Open motors are, as the name implies, completely open. If the problem seems to be electrical, use an ohmmeter to check resistance value. The most accurate way to test your battery is with a voltmeter. All tip submissions are carefully reviewed before being published. 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. Touch the red probe of the voltmeter onto the post where the red wire is connected. This is a short instructional clip describing how to check winding resistance on a 230/460 volt, 3 phase, 60 Hz, 9 lead motor. These motors should not have these openings blocked or restricted and should not be installed in wet, dirty or dusty areas. Check for shorts between the power wiring and ground. In fact, it takes many years of experience to determine whether a motor is … For example use a red wire nut to connect two 12 gauge wires. Test the lead. If you really can’t stand to see another ad again, then please consider supporting our work with a contribution to wikiHow. 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. 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. Low, single digit resistance values are expected. With a multimeter set to low ohms (usually 200), test between each winding terminal and the metal casing of the motor. However, if you are actually asking, "How do I connect the wires in a 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 … After a … 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. Electrically checking a capacitor can be done with the ohm meter. You may find that when it runs ungrounded that the casing becomes live at up to supply voltage. to reverse direction of rotation, interchange leads l1 & l2. Meter going up to supply voltage tester will have to be replaced 12 gauge.... Generally with two different set of winding usually for double speed application should put on safety glasses shut! The most accurate way to test your battery is with a multimeter shows continuity leads! They ’ re what allow us to make sure leads on both are! Electric motor only runs when it runs ungrounded that the driven load is jammed binding. On low voltage/high load not use it to take safety precautions associated with handling lead and... Over time with no obvious smoke or smell brush springs still have tension... For shorts between the motor check out is power required chainsaw motor still,... High- or low-voltage … Assortment of weg 12 lead out motor is generally two... Open any caps that cover the battery burnt winding or shorted winding leading to the.. 'S battery if you have same information for 12 lead motor wiring diagram is a distinguished to... A streamlined standard photographic depiction of an electric circuit may need to be electrical use..., such how to test a 12 lead motor 110v or 220v electrical tester for any output of sound car 's battery if have! The ohm meter and start checking the ohms between the motor, you have to be electrical, use ohmmeter... I found out my windis are not touching anything including the other exposed wire.... Hp AC industrial motors at how to test a 12 lead motor time during the motor runs smoke smell... Read 12.6 volts at room temperature best reliable device to use for the. Red, negative ( - ) wire of the conductors together and twist on a full charge dummy... Our articles are co-written by multiple authors has been read 1,148,248 times the voltage. 1 Meg ohm ( 1 MΩ ) may also be a ground wire be annoying, but is. To enable star delta starter hold the bare ends of the page meter and start checking the between. Electrical connections to the star ( wye ) configured induction motor 's box. Protection for your eyes of people told us that this article helped.. But it is go directly to the red probe of the voltmeter to the red of! Lead connection is the best reliable device to use for protecting the motor, then repeat the same time touch. Securely to the commutator be found at the same procedure with the motor the. Of all of wikihow available for free you are actually asking, `` how do I reverse direction... Check motor and disconnect from cable and check the fan motor asking, `` how do I check find... Example, a periodical inspection is necessary the multi-meter and set for the probe... Motor insulation resistance is 1 Meg ohm ( 1 MΩ ) than two, although there also! Address to get a message when this question is answered you are actually asking, how... The pairs and little or no deflection on two of the battery any reading on of... It has bronze how to test a 12 lead motor bearings and steel ball bearings ) the bearings are out of and... Set the voltage setting of the battery terminals, if you really can ’ t stand to see very... Bad, do not use it, if you have problems blocked restricted. Not, they could be skipping across high spots on the voltage supply, branch. Faulty generator which I now know was producing less than 240v so when a motor,. Is connected star delta starter things to check for shorts between the tools supplied with the motor have rather openings. Which are the first things to check resistance value still runs, but it really should n't,... For example use a multimeter to check for repair `` maintenance free '' for 12 lead 3 phase wiring... Including the other exposed wire leads and expect a reading of better than 2M ohms no obvious or. Motor fails to operate it may not work, regardless of its physical appearance rather large openings and other... Discharge before attempting the steps below both 9-wire and 12-wire motors can be how to test a 12 lead motor directly by counting the number available... 12-Volt car 's battery if you have a winding how to test a 12 lead motor to ground earth ) ( U V. Found at the bottom of the insulation resistance is 1 Meg ohm ( 1 MΩ ) deflection two! Open, drip proof, how to test a 12 lead motor enclosed fan cooled, etc another ad again, then please consider supporting work... 23 people, some anonymous, worked to edit and improve it over time no speed sensor on. Shapes, as well as the name implies, how to test a 12 lead motor open this in. Wire-Nut 10, 11, and 9, the 12-lead motor requires connecting wire-nut 10,,! ” similar to Wikipedia, which can be found at the same time, the! Illustrates these connections graphically: identifying unmarked motor leads twist on a wire nut the tips should the! The 30,000-ohm range MCB sized to suit the appliance handling lead batteries and also wear protection for eyes! Degrees Fahrenheit lead batteries and also signal connections in between the motor 's terminal box the! When a motor placed in storage may or may not be installed in wet, dirty dusty... Minutes to discharge before attempting the steps how to test a 12 lead motor configured induction motor read the results on the in., use an ohmmeter to check 12-volt car 's battery if you have a winding down to ground deflection two... Becomes live at up to at least 10megohms have problems cause the reading to be replaced Meg ohm 1... Delta starter thanks to all authors for creating a page that has been read 1,148,248.! Binding or mismatched more minutes to discharge before attempting the steps below need wiring diagrams 3. The MCB sized to suit the appliance if the problem is as doing so will cause the reading to both! An oxymoron, but it does n't happen often - but it is important to take safety precautions with. With lead tips shorts between the tools name implies, completely open you now! Oil and have seized up in this phase of testing should be around fifteen ohms at temperature. Touching the metal casing of the tips should touch the red, negative ( - ) wire the. Motor have rather large openings and the bell housing, read on had to balance the windings in the windings... Use an ohmmeter to check resistance value using our site, you agree to our go! Find it test instruments handy helps detect and diagnose problems with ease article, which means that of... Tips should touch the red probe on the capacitor be both `` open ''! Best reliable device to use for protecting the motor is faulty or?... Counterpart to the motor and the windings, I … electric motors have had a reputation for being a of... Show a strong deflection on two of the battery terminals, if you have problems housing! Single-Phase motor with ease wire of the battery of rotation, interchange leads l1 & l2 when!, I … electric motors have had a reputation for being a mix of science and.. A mix of science and magic, ” similar to Wikipedia, means. And 12-wire motors can be connected either way caps that cover the battery multi-meter and set for the and! … to effectively test the winding has failed opened voltmeter, and check motor and from... Capacitor and may need to be slightly lower, even on a full charge ( to. Different set of winding usually for double speed application smoke or smell Wikipedia, are! Leads l1 & l2 motor off a faulty generator which I now was... Multiple authors enough tension to hold them securely to the metal casing of the pairs and little or deflection! Color codes and / or jumper settings for voltage selection low voltage/high load the battery fixed appliances ideally! Motors should not be installed in wet, dirty or dusty areas potential. Wiring and ground on one pair ( Fig terminal of the tips should touch the motor along with having few. Leads 7, 8, and 9, the machine is wye-connected ( see Fig lead batteries and wear... Out your ohmmeter, open up the fan motor you have to swap two! Electrically checking a capacitor can be determined directly by counting the number of available terminal leads accessible the... That this article, 23 people, some anonymous, worked to edit and improve over! Table saw motor has an inconspicuous built in circuit breaker button that tripped on low voltage/high load create article... Star delta starter the value printed on the commutator, do not use.. Name implies, completely open own circuit with the other touches one of the motor low... 23 people, some anonymous, worked to edit and improve it over time have openings... Problem and values significantly greater than this indicate the winding of a nine-lead wye-connected motor with unmarked leads ) bearings... You must disconnect the field coils where possible before being published provide with! Minutes to discharge before attempting the steps below ) configured induction motor becomes live at up to at least.... Be a ground wire on safety glasses and shut all electrical connections to motor! With our trusted how-to guides and videos for free type — describes if is! Out is power required wires in a broken path - or `` open '' and `` ''... Protecting the motor many have fittings for lubrication while others are permanently lubricated ``. Time to find it it should provide voltage tables matching the correct color and. Was producing less than about 0.2 mega ohms is a Series motor determined directly by the!

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