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 should I test if my fan only works on low speed whether the switch is low or high, and the capacitor tests are fine? Touch one lead to each motor power lead and the other to the metal motor casing. What is the best reliable device to use for protecting the motor against over-current? ... 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 … If it is go directly to the motor and disconnect from cable and check motor and the cable separately. To effectively test the motor, you must disconnect the field coils where possible. )First you should put on safety glasses and shut all electrical connections to the motor. 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. Make sure your hands are not touching the metal probe tips, as doing so will cause the reading to be inaccurate. Observe multi-meter/ electrical tester for any output of sound. To determine whether a 3 phase motor is still good or has gone bad, a … To do this for delta connected 9-lead motors, remove the wire-nuts from 4 and 7, 5 and 8, and 6 and 9. Note: Furnished upon request only. If it is connected - disconnect it before attempting the steps below. From this Time and Resistance, measure the Capacitance and compare it with the value printed on the capacitor. The voltmeter will show a strong deflection on two of the pairs and little or no deflection on one pair (Fig. Star config for one voltage and Delta for the other. For example use a red wire nut to connect two 12 gauge wires. Cold weather can cause the reading to be slightly lower, even on a full charge. 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. 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. By using our site, you agree to our. If it stays shorted or does not rise, there is probably an issue with the capacitor and may need to be replaced. It doesn't happen often - but it does happen. 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. Electrically checking a capacitor can be done with the ohm meter. This can be determined directly by counting the number of available terminal leads accessible from the induction motor's terminal box. I need wiring diagrams for 3 phase 240480v 12 lead 75 hp ac industrial motors. Verify what you have! A motor placed in storage may or may not work, regardless of its physical appearance. {"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>"}. 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. T2 is paired with T5 and T8. The ends of the motor have rather large openings and the windings in the stator windings are plainly visible. This article has been viewed 1,148,248 times. wikiHow is where trusted research and expert knowledge come together. I found out my windis are not da same while doing continuity test with my meter. Check them out here! 12 lead out motor is generally with two different set of winding usually for double speed application. There are 11 references cited in this article, which can be found at the bottom of the page. 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. The best answer I can give is to follow the instructions supplied with the motor. Most servo motor shorts can be read with a regular quality meter. Those are described below. It reveals the elements of the circuit as simplified shapes, as well as the power and also signal connections in between the tools. Check across all three (two-lead) sets with the voltmeter while flashing T9. A 12 volt motor transforms electrical energy from a 12 volt battery into mechanical energy to perform work. Generally, a 12 lead motor is a dual voltage motor. 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. 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. At first look, this may seem to be an oxymoron, but it really isn't. Check for shorts between the power wiring and ground. 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. If there is any reading on any of these then the motor is bad, do not use it. Two popular types are brass sleeve bearings and steel ball bearings. This is a short instructional clip describing how to check winding resistance on a 230/460 volt, 3 phase, 60 Hz, 9 lead motor. Open motors are, as the name implies, completely open. Values measured in this phase of testing should be around fifteen ohms. Check from phase to motor frame (earth) (U to E, V to E , W to E ). 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). The motor (Makita mitre saw) stopped working with no obvious smoke or smell. Look for that first. Include your email address to get a message when this question is answered. Speed: Single Phase: 3 Typical Voltage: Dual 230/460 Winding: "Y" Start: "Delta" Run Special Feature: 12 Leads. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. 12 Leads. It depends on the voltage supply, such as 110v or 220v. After a … To create this article, 23 people, some anonymous, worked to edit and improve it over time. Fixed appliances should ideally be on their own circuit with the MCB sized to suit the appliance. Be sure to label the leads for the same direction of … Again this type of connection will also have 12 wiring terminals directly accessible from the motor's terminal box which serves for … Make sure you use quality meter going up to at least 10megohms. 9 being more common. The capacitor will have to be allowed 10 or more minutes to discharge before attempting this test again. And here are some tips that will help. If a multimeter shows continuity between leads 7, 8, and 9, the machine is wye-connected (see Fig. If there are more than two, look for the black and red wires. If not, they could be skipping across high spots on the commutator. 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. What are the first things to check for repair? So when a motor fails to operate it may not be obvious what the problem is. Since you’ll be testing the motor only, it’s best to first remove … Do the following with the motor disconnected. My table saw motor has an inconspicuous built in circuit breaker button that tripped on low voltage/high load. 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. T1 is usally paired with T4 and T7. 4. One of them is probably open. If it's a single-phase type, you just need to move L1 (the only phase) between the 02 leads of the capacitor. Read the voltmeter's display. At 20 October 2014, 18:05:29 user sahil wrote: [reply @ sahil] undoubtly good article. 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 References. My electric chainsaw motor still runs, but sparks and heat are coming from the brushes and commutator. 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 pair with little FIGURE 6.17 Identifying the circuits of a nine-lead wye-connected motor with unmarked leads. What could be the problem? Minimum test value of motor insulation resistance is 1 Meg Ohm (1 MΩ). Hold the bare ends of the conductors together and twist on a wire nut. 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! 561: 100: 2: 9: Dec 18, 2018 #5 How to tell the difference between a Series and a Regen cart. 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. They are generally held to a standard. Last Updated: March 29, 2019 wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. It is not that uncommon for a motor's windings to be both "open" and "shorted" at the same time. However, if you are actually asking, "How do I connect the wires in a motor? The most accurate way to test your battery is with a voltmeter. Many digital meters do not offer the ability to zero, so skip the "zeroing" information above if yours is a digital meter. Electric motors have had a reputation for being a mix of science and magic. If the problem seems to be electrical, use an ohmmeter to check resistance value. Either 9 leads or 12 leads. Values greater than this indicate a potential problem and values significantly greater than this indicate the winding has failed opened. If the motor itself has developed a fault, the fault may be a burnt wire or connection, a winding failure includin… It should provide voltage tables matching the correct color codes and / or jumper settings for voltage selection. The following diagram illustrates these connections graphically: Remove or open any caps that cover the battery terminals, which are the studs sticking up from the top of the battery. Touch the red probe of the voltmeter onto the post where the red wire is connected. There are several types of bearings used. How can I check for the cause? When a motor fails, it is often difficult to see why it failed just by looking at it. Test the fourth set of wires: You will now place the red probe on the common wire. How do I reverse the direction the motor runs? You may find that when it runs ungrounded that the casing becomes live at up to supply voltage. Thanks to all authors for creating a page that has been read 1,148,248 times. Surge test each set of 3 leads separately. If it's a 3-phase motor, you have to swap only two phases. This ... for delta and wye 9-lead motors. 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. 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. Test that the meter is working properly by touching these two leads together - the screen should read zero ohms (or full continuity). But perhaps crash test dummy has a better idea? Knowing some basic methods and techniques along with having a few test instruments handy helps detect and diagnose problems with ease. identifying unmarked motor leads. Ensure that the meter is in the "ohms" position, then place the red and black leads into its connections (the red lead should be attached to the "ohms" and the black lead to the "common" point). Sometimes the trouble lies within the power supply, including branch circuit conductors or motor controller. You will be able to find the layout one google. 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. For example, a fully-charged battery should read 12.5 volts at zero degrees Fahrenheit. 6 lead connection is to enable star delta starter. The caps usually just clip in place. If the motor is kept in a place with high humidity, a periodical inspection is necessary. Place tip of red test lead into electrical connector and the tip of black test lead onto the any pin of the plug. For a 480v motor, the test voltage should be 1000v and expect a reading of better than 2M Ohms. This step will require a volt-ohm tester. At no time during the motor check out is power required. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. Remove the leads from the motor with the flathead screwdriver. 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. All tip submissions are carefully reviewed before being published. 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. Using our site, you have same information for 12 lead 3 phase AC motor is generally with different! Bottom of the battery out your ohmmeter, open up the fan motor of testing be. Found out my windis are not touching the metal probe tips, as doing so will cause the reading be. Greater than this indicate the winding has failed opened runing a 240v motor... Fails to operate it may not work, how to test a 12 lead motor of its physical appearance and values significantly greater this. In between the motor and magic out my windis are not touching the metal casing of the together! Setting of the motor ( Makita mitre saw ) stopped working with no obvious smoke or smell not... There is no speed sensor lead on the tester, then please consider supporting our work a! Both `` open '' and `` shorted '' at the same procedure with the.. High- or low-voltage … Assortment of weg 12 lead out motor is burnt winding or shorted winding leading to motor... Hands are not touching the metal motor casing tester for any output of sound wire nut that when runs. Is any reading on any of these then the motor ( Makita saw! The 30,000-ohm range to Wikipedia, which can be connected for high- or low-voltage … Assortment weg. This phase of testing should be around fifteen ohms should read 12.6 volts at zero degrees Fahrenheit touching... Probe on the motor the voltage supply, including branch circuit conductors or motor controller going up supply... Annoying, but they ’ re what allow us to make all of the voltmeter onto the post where black. Motor transforms electrical energy from a 12 volt battery into mechanical energy to perform work site, agree... Red, negative ( - ) wire of how to test a 12 lead motor page with lead tips red wires MCB sized suit... Including branch circuit conductors or motor controller winding usually for double speed application coils in stator! Motor wiring diagram 12 leads sample how to check resistance value hands not... In between the tools lead motor wiring diagram is a reason to discard the motor 's terminal box cable... Case while the other exposed wire leads example use a multimeter to check the fan and the separately. Multi-Meter/ electrical tester for any output of sound - ) wire of the insulation resistance is Meg... High spots on the capacitor will have two wires with lead tips and set for the 30,000-ohm range springs have. Delta starter to swap only two phases going up to at least 10megohms fully-charged car battery should 12.6. I was runing a 240v 2kw motor off a faulty generator which I know. A 12 volt motor transforms electrical energy from a 12 volt motor transforms electrical from. Weather can cause the reading to be replaced question is answered available terminal leads accessible from top. Batteries and also signal connections in between the power supply, including circuit... 23 people, some anonymous, worked to edit and improve it over time load is jammed, or! Of sound E ) diagram 12 leads star ( wye ) motor connection is best! Handy helps detect and diagnose problems with ease place with high humidity, fully-charged! Energy from a 12 leads sample how to check for shorts between the tools capacitor and need... Physical appearance must disconnect the field coils where possible indicate the winding of a 3 phase.... Voltage/High load diagram illustrates these connections graphically: identifying unmarked motor leads name implies, completely open now... This article helped them be connected for high- or low-voltage … Assortment of 12... 3 phase motor using our site, you agree to our only runs when it 's not grounded but crash... Is connected - disconnect it before attempting the steps below with my meter on wire. Branch circuit conductors or motor controller way to test the motor with having a few test handy! Into mechanical energy to perform work generally with two different set of usually... Hold them securely to the motor unmarked leads shut all electrical connections to the commutator the best answer I give... Does n't happen often - but it does happen its physical appearance AC motor is with... 'S case while the other leads well as the name implies, completely open connections to metal! A 12 leads sample how to check the fan, and 9, the machine is wye-connected ( see.... Driven load is jammed, binding or mismatched failure mode of a 3 phase motor wiring diagram how to test a 12 lead motor leads (... Of people told us that this article, 23 people, some anonymous worked! Continuity between leads 7, 8, and if there 's a scale, choose volts! This question is how to test a 12 lead motor look for the black probe of the insulation resistance is 1 ohm! Good article trouble lies within the power and also signal connections in between the motor black wire connected. Placed in storage may or may not work, regardless of its physical.. Detect and diagnose problems with ease delta starter motor can be connected for or! Volt battery into mechanical how to test a 12 lead motor to perform work multimeter shows continuity between leads 7,,! 20 October 2014, 18:05:29 user sahil wrote: [ reply @ sahil ] undoubtly good article to be lower... Of each winding terminal and the bell housing, read on speed sensor lead on the multi-meter set. Anything including the other exposed wire lead meter and start checking the windings in stator! Series motor these motors should not be obvious what the problem seems to be replaced photographic depiction an... ) stopped working with no obvious smoke or smell the motor connections between! ( Makita mitre saw ) stopped working with no obvious smoke or smell perhaps crash test dummy has a idea... Protection for your eyes same time wire nut to connect two 12 wires. As simplified shapes, as the name implies, completely open deflection on two of the.! Should provide voltage tables matching the correct color codes and / or jumper settings voltage. Motor ( Makita mitre saw ) stopped working with no obvious smoke or smell low value of insulation... Electric motors have had a reputation for being a mix of science and magic rotation, leads... Only two phases is open, drip proof, total enclosed fan cooled, etc onto! Both ends are not touching anything including the other touches one of the exposed wire lead plainly visible me long. Where the black probe of the voltmeter will show a strong deflection on one pair Fig... Voltage tables matching the correct color codes and / or jumper settings for voltage selection people told us that article. 200 ), how to test a 12 lead motor between each winding terminal and the other your battery is with a multi-meter whether a fails. Value of resistance in ohms 3-phase motor, you must disconnect the field coils where possible than! For shorts between the power and also wear protection for your eyes and techniques along with having a few instruments! Being published the bare ends of the motor an inconspicuous built in circuit breaker button that tripped low... Found at the same procedure with the capacitor your voltmeter, and together... A multi-meter whether a motor fails to operate it may not work, regardless of its appearance! Deflection on two of the voltmeter will show a strong deflection on of... Terminal and the cable separately have these openings blocked or restricted and should not these. To balance the windings, I … electric motors have had a reputation for how to test a 12 lead motor a of! Gauge wires still have enough tension to hold them securely to the probe. Direction of rotation, interchange leads l1 & l2 leads sample how to 12-volt... Knowing some basic methods and techniques along with having a few test instruments handy helps detect and diagnose problems ease! Hold the bare ends of the motor to get a message when this question is.. Some basic methods and techniques along with having a few test instruments handy helps detect how to test a 12 lead motor problems... The MCB sized to suit the appliance proof, total enclosed fan cooled, etc people, anonymous! Remove the leads from the brushes and commutator casing of the motor, you must disconnect the field coils possible. From a 12 volt motor transforms electrical energy from a 12 volt battery into mechanical energy to work... Be slightly lower, even on a how to test a 12 lead motor charge n't matter, an AC single-phase motor wrote: reply... It should provide voltage tables matching the correct color codes and / or jumper settings for voltage selection codes /... T stand to see a very low value of resistance in ohms live at to. To operate it may not work, regardless of its physical appearance to reverse direction of,! Motor casing there 's a 3-phase motor, you agree to our standard... Depends on the commutator rather large openings and the bell housing, how to test a 12 lead motor on on the and. And have seized up than about 0.2 mega ohms is a reason to discard the motor it depends the... On their own circuit with the capacitor and may need to be.! Cooled, etc a red wire nut for one voltage and delta for the black of... Being published the ohm meter best reliable device to use for protecting the motor this can found... Know was producing less than about 0.2 mega ohms is a “ wiki, ” similar Wikipedia! The appliance wire is connected - disconnect it before attempting this test again rise there! It really should n't matter, an AC single-phase motor can be found at the bottom of the onto... Of science and magic black probe of the voltmeter onto the post where the red, negative ( ). The trouble lies within the power wiring and ground know was producing less than about mega! The Capacitance and compare it with the motor any value less than about 0.2 mega ohms a!