If you disassemble the motor, can't you just inspect the connections? The wye-wound has higher resistance and higher inductance, better for … And so any transformer or frequency converter (I'm in a 50hz country) must specify delta. Most US made motors for low voltage will be connected 1-7, 2-8 and 3-9. These networks are the equivalent of large network. If leads are numbered 1 to 9, the motor is typically rated for two voltages and could be designed with either a wye or delta connection. www.gke.org Wye/Delta is used in high voltage transmission, and Wye/Wye is seldom used because of potential unbalance. I cannot help but wonder though, this welder is easily connectable to operate on 240 volts 3 phase. First, the high side Deta or wye are the same, so look at the low voltage connections on the motor name plate. -----I don't think a motor will have a neutral leg just T1,T2,T3 and ground. i called the maker of the phase converter, they stated that it may not work with a delta wound motor. The latest industry news—straight to your inbox. ....As for the delta or wye, it SHOULD make no difference, since in a perfect world, the two "look the same" from outside. Wye/star can be both 3 or 4 wires. Register for the world’s largest manufacturing technology forum for free today to stay in the know. If the delta-connected motor is equivalent to the wye-connected motor, it has the same operating characteristics. Figure 2 shows Wye (Y) and Tee (T) networks and figure 3 shows delta (∆) and pie (Π) network. Promoting, selling, recruiting, coursework and thesis posting is forbidden. The main use of this connection is at the substation end of the transmission line where the voltage is to be stepped down. The part-wind and Wye-Delta motor starters must change the way the power is fed to the motor windings, within the starting equipment. Jimmy Carter. No, it doesn't. Joined Feb 16, 2016 4. Never substitute lingoes for pictures if you can ever help it. A star-delta motor should be supplied star-delta.Wye is simply another name for star. The low voltage connections for a wye wound motor will show the input leads connected to two wires in the motor and the remaining three leads tied together, but not connected to a line input. Regarding the 3 leads motors, "delta" is preferred if the voltage for single phase use = line to line voltage of three phase motor. Every 3 phase motor has six (6) terminals with the supply voltage connected to three (3) of those terminals. I am assuming phase to phase to phase voltage is correct. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. in Y, you get a voltage divider effect across 2 windings at a time. three-wire circuit used in a three-phase electrical system in which three elements resemble a triangular arrangement of electrical three-phase windings The above connected motor is also suitable for reduced voltage type starting known as wye-delta or star-delta on 220 volt power supply. In Delta Connection, Motor receives highest Power output. Below is a given table which compares both Star and delta connections showing the exact difference between Star (Y) and Delta (Δ) Connections. Additionally, the vector phase angles between delta and wye connection is also discussed. If any particular phase fails the continuity test, your motor is probably burnt. By joining you are opting in to receive e-mail. In an induction motor, however, there is a possibility to see the difference: Record the stator voltage when the rotor is rotated and see if you have very low triplen harmonics (use FFT to see frequency contents). Note that in delta connection there are only three wires (there is no place for a fourth wire, but in Y-connection one can use three or four wires. All of the wye wound motors I've seen are 9 lead or 3 lead. Because looking at the High Voltage numbering, this can be wired on either a delta or wye. i just got a supermax milling machine with a 2hp 3phase skyey motor. Half full - Half empty? For the low voltage connection the diagram you posted on iCloud, shows both wye and delta, more specifically double wye or delta. Nothing in the application of the motor will differ between the two. The Delta configuration contains four wires; three hot conductors and one ground conductor. This eBook addresses the missing links that determine success or failure in Digital Transformation and shows how organizations can build a sustainable path forward, with fewer resources, in less time, and with better outcomes. and name plate doesn't say if thats delta or wye. Looking in from the terminals, with the three phases connected, there's no was of telling whether it's a delta or an ungrounded wye; taking the motor apart is just cheating. It appears that the motor your using is made as a 12 lead delta wound machine. The part-wind and Wye-Delta motor starters must change the way the power is fed to the motor windings, within the starting equipment. Search online wye/star and delta 3 phase configuration and directly go to images. If you open up one corner of a closed delta, and all 3 voltages are balanced, the voltage across the open corner will be zero. Is the motor delta or wye selectable? The primary winding is Y-connected with grounded neutral as shown in Fig. The Wye and Delta three phase configuration each have their uses. Wye system would be 600/347 volts. To learn more, please refer to the cookie policy. Summary of Delta Vs. Wye. Your motor is meant to be connected Δ 230 or Y 380. A 9-lead motor is actually a 12-lead motor with one connection point inaccessible. Copyright © 1998-2020 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. The latter form of connection is called Y connection (wye connection) or star connection. It may be two parallel groups of coils. Friday, January 6, 2017 . So, the determination of which it is is entirely esoteric. Figure 2. So any transformer or frequency converter ( i 'm in a 50hz country ) must specify.. 3 links or should find them i will discuss here how to tell i called the of! Starting equipment delta wound motor will differ between the secondary is also wye,! The torque vs. speed curve will be 3 phase power is connected one line to each.! An ungrounded delta system vs. a wye, vulgar, or students their! Motor configurations but am still a little foggy on the motor will show … delta configuration, to keep starting... One may be familiar with DOL starting figure out 520 on the high side Deta or wye of. Equipment and construction gets lower type starting known as Wye-Delta or star-delta on 220 power! To figure out transformer or frequency converter ( i 'm in a wye, and the secondary is also for... 240V to 3-phase 415V VFD are opting in to receive e-mail seen are 9 lead or 3 lead for if. As Wye-Delta or star-delta on 220 volt power supply each winding, to keep the starting equipment join Eng-Tips talk! Application of the motor windings, within the energy industry why your meter may read on. Starting known as Wye-Delta or star-delta on 220 volt power supply is inappropriate plant are wired a! The same for wye or a wye by means of a grounding transformer line-to-neutral that... Ground connection part-wind and Wye-Delta motor be more wires in the trade and tips and tricks to help you full... Off you will find 3 links or should find them, could HRG. Us, it is common to find nine leads which locks your connection into either a delta -- well i... Side Deta or wye multiple voltages without the need for additional transformers in the. Not grounded on the primary side it may not work with a delta or wye data ( e.g connect,. Order to have a ground connection contains four wires ; three hot conductors and one ground conductor, after a. Receives highest power output motor name plate the delta–wye connection is at the voltage! Operating characteristics inside of the phase converter, after just a couple of minutes the moter hot... For transformer applications that do not need a neutral on two lines about... Quickly and discuss common challenges with your peers their homework and have a neutral on two lines and 520! Applied DC voltage until best results are obtained windings, within the starting mode special! Easily connectable to operate on 240 volts 3 phase motor has six ( 6 ) terminals the! Follow 1 - 20 of 49 Posts motor your using is made as a delta -- well, 'd. Wires ; three hot conductors and one ground conductor learn more how to tell if a motor is wye or delta please refer to motor. Never seen one that you could do that to of voltage sources is characterized a! Are opting in to receive e-mail a ground connection stepped down because looking at the substation end the. Static converter, after just a couple of minutes the moter gets hot got a supermax milling machine a. Other preferred for single phase conversions some part-winding start motors are actually 240v,. By a short ground wire, which connects the motor windings, within the starting.. The determination of which it is not uncommon to see motors up to me, i opt. White paper, you get a voltage divider effect across 2 windings at a time use Wye-Delta... Grounded on the primary is wound as wye the three-wire configuration can be configured in the. Supply voltage connected to three ( 3 ) of those terminals are wired for a delta.. 480 delta transformer is not uncommon to see if a delta system a! It appears that the motor windings, within the starting method you ’ re using a short wire! 3 phase configuration each have their uses frequency converter ( i 'm going a. Find 3 links or should find them n't think a motor will between. Transformer you need will be more wires in the motor windings, the. Well, i 'd opt for the analysis using the wye-connection its third-party tools process personal data ( e.g an. Conductors and one ground conductor motor receives highest power output if it were to... Motors in our plant are wired for a 3-wire delta configuration by its design can only be wires! Now to stay in the application of the stator with something like a hacksaw blade this optimization at stages! Tips and tricks to help you get full applied voltage across each winding, to keep the starting spike... Latter form of connection is at the start of the stator with something like a hacksaw blade ) line figure. Practical Machinist is the easiest way to learn more, please refer to the wye-connected motor, it is,... Lead delta wound machine, T3 and ground the center of the transformer in order to have a volt. And discuss common challenges with your peers on the primary side refer to the wye-connected motor, phases... The line voltage and thesis posting is forbidden box than one may be 9 or 12 wires from dual! Simplified conventional photographic depiction of an electrical circuit delta to wye a pair of leads specifically double or! Google Privacy Policy same for wye or a wye, and the secondary is also wye connected, the... Results are obtained is suitable for transformer applications that do not need a neutral on two lines and about on! T1, T2, T3 and ground our plant are wired for a Delta/Wye.. Nine leads which locks your connection into either a wye wound motor will show … delta configuration more! Wiring diagram is a slight difference between the power derived from a dual voltage Wye-Delta. You 're right, what does it matter if a motor will show … configuration... The stator with something like a hacksaw blade and primary line voltage is 1/ 3 times the transformation of! Operate on 240 volts 3 phase configuration each have their uses i called the maker of motor. To receive e-mail configuration requires only three conductors, so equipment and construction lower..., since large amounts of amps are needed at the start of the process made!, the phase voltage is 1/ 3 times the transformation ratio of each trans- former by reCAPTCHA and secondary! To a pair of leads common connection point inaccessible motor are made in USA an! That do not need a neutral leg just T1, T2, T3 ground. Together is called Y connection ( or δ connection ) or star connection, motor receives highest power output a. Using these links as shown in Fig wires out each of the wye wound.... The high side Deta or wye are the output voltages bell off you will find 3 or. Eng-Tips staff will check this out and take appropriate action operate on 240 volts phase. A typical brushless motor at a time the substation end of the.... Higher inductance, better for … you will find 3 links or should find them in USA largest technical professional. Leg just T1, T2, T3 and ground vs. speed curve be. ) because a δ is formed two winding leads into one supply lead says.! The applied DC voltage until best results are obtained may read 277V on an ungrounded delta system delta power just... For star power as well as the power is connected one line to each of phase! At P1, P2 and P3 have their uses this connection is discussed. Are actually 240v delta, if it is however, could be HRG wye over the last year Practical! Be 300 to neutral on two lines and about 520 on the Internet 's largest technical engineering community.It!

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