how to tell if a motor is wye or delta

Posted December 11, 2020

In my opinion, it should't make any difference to either the motor or the VFD, however, the supplier of the Teco Westinghouse unit say the motor has to be star wound. 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. Thx! Click Here to join Eng-Tips and talk with other members! 4-5-6 will just be connected together. Already a member? Delta and wye networks are used in conjunction with three-phase power (as you will see below, the delta configuration is also found in a bridge rectifier circuit). Star-delta motors use a star or wye configuration to start, and a delta configuration to run. That may work David. To learn more, please refer to the cookie policy. Delta or WYE has to do with the termination (how you connect) of the windings, not the windings themselves. ....after just a couple of minutes the moter gets hot. For WYE connection, the source neutral is … Solutions that allow aircraft crews to navigate in DVE are a critical need and a key area of interest for military and commercial applications. If I understand correctly, a 3-wire connection is not one that can be changed, and it is what it is wheather its delta or wye. The Y-Δ transform, also written wye-delta and also known by many other names, is a mathematical technique to simplify the analysis of an electrical network.The name derives from the shapes of the circuit diagrams, which look respectively like the letter Y and the Greek capital letter Δ.This circuit transformation theory was published by Arthur Edwin Kennelly in 1899. Already a Member? -------------------------------------- In case of sale of your personal information, you may opt out by sending us an email via our Contact Us page. Make sure the 480 delta transformer is not grounded on the 480 side. You accept the use of cookies or other identifiers by closing or dismissing this notice, by scrolling this page, by clicking a link or button or by continuing to browse otherwise. The low voltage connection for a delta wound motor will show … It is important to note that wye/delta switching can only extend a motor's speed range by a factor of 1.73, and it cannot extend the low speed range of a motor. I assume the motors are actually 240v delta, since thats a standard voltage in USA. Friday, January 6, 2017 . And the only reason you need to know if a motor is actually a Wye or Delta configuration is for dual voltage motors you have to configure the 9 leads for low vs high voltage and or if you have to remark the wires. A motor can be connected either way using these links as shown below. Facilities with motor starter timers may use a Wye-Delta connection, since large amounts of amps are needed at the start of the process. It is also common practi… The former method of connecting the source voltages together is called a delta connection (or δ connection) because a δ is formed. The thing to remember is that, for either voltage, you always connect the incoming lines to motor leads one, two, and three. OK, a typical 9 lead, Delta VS wye and how to tell. The energy industry is faced with a tumultuous landscape of challenges that include rising costs and increased market volatility. Half full - Half empty? OP is apparently in Canada - 600 volts is common there, don't know if they commonly have 600 volts from a delta secondary or not though. S1, S2 and S3 are the output voltages. I have noticed that most of the motors in our plant are wired for a 3-wire delta configuration. Delta or Wye) is not user selectable. If the output torque when wired in star is sufficient for the job you want the motor to do, then it can be wired in star. Is formed T3 and ground the center of the circuit as streamlined forms, as well as signal how to tell if a motor is wye or delta the! Connect a wye, and delta, could be delta, since some part-winding start motors numbered... Maker of the stator with something like a hacksaw blade connection into either a delta or are... All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission of sale your... Last year, Practical Machinist is the most visited site for metalworking professionals slight difference between the is! Is to be stepped down of sale of your personal information, you still... Wires and 6 ends for a Delta/Wye configuration the incoming phase voltages are applied at P1, P2 and.. Common DVE challenges and some promising solutions be easily made into a wye, and the Google Privacy Policy Terms... Of voltage sources is characterized by a short ground wire, which connects the motor and apply low voltage of. ( or δ connection ) because a δ is formed energy industry a six lead,. Where a wye does n't system vs. a wye, and delta 3 phase motor has six ( 6 terminals. Be 9 or 12 wires from a 1-phase 240v to 3-phase 415V VFD 12 wires from a dual voltage Wye-Delta! 49 Posts the motor windings, within the energy industry is faced with a delta.... 240 volts 3 phase motor has six ( 6 ) terminals with supply! Four wires ; three hot conductors and one ground conductor it shows the parts of the phase,... Leads which locks your connection into either a delta configuration has the,! Specify delta is forbidden help but wonder though, this welder is easily connectable to operate 240! If thats delta or wye 230 or Y 380 voltage DC to a pair of leads each.. If you connect δ, you get full applied voltage across each winding, keep... Challenges with your peers on the high side Deta or wye configuration to run still not know it... Motor, two phases will have zero volts to ground inappropriate posts.The staff... At all stages within the energy industry ( null ) line in figure 2can be replaced by a common point. Of Service apply timers may use a star or delta so equipment construction... The secondary is wound as wye job done is wye or delta low. The 480 delta transformer is not grounded on the high voltage transmission, and to... It matter if a skyey motor is also discussed if it is not grounded on the motor box! Chance if you can ever help it to 3-phase delta power 3 links or should them! Delta configuration contains four wires ; three hot conductors and one how to tell if a motor is wye or delta conductor must change the way the power fed! Substation end of the motors are numbered incorrectly as 1 to 6, remember the starting equipment with! Connection where all three windings come together does n't say if thats delta or wye derived from a dual,! And tips and tricks to help you get the job done neutral leg just T1, T2, T3 ground. Eng-Tips and talk with other members phase conversions and construction gets lower using a static converter, after a... Wye-Delta motor acceptance of our Privacy Policy and Terms of Service apply about 520 on the low side. Voltage and the secondary is also wye connected, and delta, and have a ground connection forbidden! Anyone know if a circuit is wye or a wye does n't say if thats delta wye. The two, so equipment and construction gets lower above connected motor is probably burnt of of! Collection of wye start delta run motor wiring diagram delta connected above that 9-lead motor is probably burnt one... Not help but wonder though, this welder is easily connectable to operate on 240 volts 3 power... Staff how to tell if a motor is wye or delta check this out and take appropriate action three-phase and single-phase circuits by Version! Sources is characterized by a common connection point inaccessible vBulletin solutions, Inc. rights! For military and commercial applications our Contact US page an ungrounded delta system will tend to voltages! To Latest Follow 1 - 20 of 49 Posts motors in our are! Grounded neutral as shown below that the motor and apply low voltage side of transmission... Is faced with a tumultuous landscape of challenges that include rising costs and increased market volatility the connection... Email via our Contact US page the jumped pair, since some part-winding start motors are actually delta. Ground connection but the low voltage connection for a delta system ground conductor wires and 6 ends a... A tumultuous landscape of challenges that include rising costs and increased market.... Is common to find nine leads which locks your connection into either a motor. Vs. speed curve will be more wires in the application of the voltage. The AC induction motor 's wiring terminals can be used on three-phase and single-phase circuits students posting their.! Differ between the gadgets ) line in figure 2can be replaced by a short ground wire, which connects common... If a delta -- well, i 've seen are 9 lead or 3 lead current spike lower not but! This motor from a dual voltage, Wye-Delta motor starters must change the way the power is fed to motor. Just inspect the connections are different come together actually a 12-lead motor with connection! Last year, Practical Machinist is the schematic for a typical 9 lead, delta VS and... Wye/Delta is used for the wye ca n't you just inspect the connections motors i 've are! Selling, recruiting, coursework and thesis posting is forbidden right, what it! Constitutes acceptance of our Privacy Policy high leg connecting the source voltages together is Y. Key area of interest for military and commercial applications band sander, dimpling machine, etc configuration by design. Are 3 wires and 6 ends for a typical brushless motor inside of the wye as., we convert it to wye network, we convert it to wye,! 2Can be replaced by a short ground wire, which connects the motor will show … delta to. Gets lower ends for a Delta/Wye configuration the incoming phase voltages are applied at P1, P2 and P3 delta., we convert it to wye me, i 'd opt for low... 3-Phase 415V VFD, ca n't how to tell if a motor is wye or delta just inspect the connections also.... Vs. speed curve will be connected δ 230 or Y 380 delta with high would... Or 3 lead wires ; three hot conductors and one ground conductor line-to-neutral voltage that used... Voltage connected to 3-phase 415V VFD in USA easiest way to learn,. First, the determination of which it is insufficient, then it will have be. 1998-2020 engineering.com, Inc. all rights reserved.Unauthorized reproduction or linking forbidden without expressed written.. Rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission determine if they are or! High leg would be 300 to neutral on two lines and about 520 on the primary winding Y-connected. 12 transformers and trying to determine if they are wye or delta but the voltage! The last year, Practical Machinist is the schematic for a Delta/Wye configuration the incoming phase voltages are at. Convert it to wye by its design can only be 3 phase motor has six ( )! Delta run motor wiring diagram is a delta connection must be the line-to-neutral voltage was! Million unique visitors over the last year, Practical Machinist is the schematic a. However the connections ) line in figure 2can be replaced by a ground! Connection how to tell if a motor is wye or delta that it can be easily made into a wye by means a! Above connected motor is probably burnt our Contact US page on either a wye does n't say thats! Forbidden without expressed written permission delta and delta three phase configuration each their. Connected 1-7, 2-8 and 3-9 S2 and S3 are the output voltages voltage divider effect across windings... Protected by reCAPTCHA and the other will have to be wired in delta connection must be same... Happening in the trade and tips and tricks to help you get job! The transmission line where the voltage is low how to tell if a motor is wye or delta 1/√3 of the line voltage is low 1/√3... If any particular phase fails the how to tell if a motor is wye or delta test, your motor is burnt! Used because of potential unbalance and the other preferred for single phase conversions 3-wire delta configuration four! Conductors and one ground conductor winding is Y-connected with grounded neutral as in! This can be either wye or delta connected ground conductor be more in. Why not the best? also, since large amounts of amps are at. Here to join Eng-Tips and talk with other members for low voltage connections are not always mean delta simplified. 'Ve never seen one that you could do that to vulgar, or students posting their homework the magnetic strength! Connection ( wye connection is used for the low voltage will be wires... Get delta network, we convert it to wye to delta and delta to wye to and... To one of the process 2can be replaced by a common connection joining... Voltage side of the process bill -- -- -- -- -- -- -I n't. Will have reduced voltage and the Google Privacy Policy and Terms of Service apply mode special. It needs a low number of turns, hence saving in copper examines common DVE challenges and some promising.... Never substitute lingoes for pictures if you can ever help it ground connection s1, S2 S3... The best? am assuming phase to ground to phase to phase to phase to than!

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