Fdtxjr

Do native speakers use "ultima" and "proxima" frequently in spoken English?

How to split IPA spelling into syllables

Why didn’t Eve recognize the little cockroach as a living organism?

Why is "la Gestapo" feminine?

Why is participating in the European Parliamentary elections used as a threat?

Should I be concerned about student access to a test bank?

Why is indicated airspeed rather than ground speed used during the takeoff roll?

Air travel with refrigerated insulin

Highest stage count that are used one right after the other?

What is the tangent at a sharp point on a curve?

Derivative of an interpolated function

Reasons for having MCU pin-states default to pull-up/down out of reset

What (if any) is the reason to buy in small local stores?

What is it called when someone votes for an option that's not their first choice?

How would a solely written language work mechanically

Is divisi notation needed for brass or woodwind in an orchestra?

Sort with assumptions

Did I make a mistake by ccing email to boss to others?

Do I have to take mana from my deck or hand when tapping this card?

Extract substring according to regexp with sed or grep

Calculate Pi using Monte Carlo

Can you describe someone as luxurious? As in someone who likes luxurious things?

Why doesn't Gödel's incompleteness theorem apply to false statements?

Magnifying glass in hyperbolic space

Confusion with the nameplate of an induction motor

3 phase AC motor 220V powered from 12V batteryDo the power ratings on the nameplate of an AC motor indicate electrical or mechanical power?Which informations do I need to calculate the efficiency and horsepower of a 3 phase induction motor?How does an induction motor start when it has no capacitor or inductor?When/How does the rotor stop accelerating in a motor?Why does stator current increase with increasing load in a synchronous motor?Can I drive a three phase induction motor with this method?How induction heating worksasynchronous induction motorHow to increase the speed of a specific AC motor

8

1

$begingroup$

Regarding the below nameplate of an induction motor:

What is meant by?:

Δ/Y
220/380

Does that mean if delta connected the line to line voltage must be 220V? Im confused also because isnt 220 phase voltage and 380 lne voltage? Could you explain this question with diagram?

motor induction

share|improve this question

asked Mar 13 at 18:01

user1999user1999

426313

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  The motor can be configured to run on different voltages by changing the way its windings are connected internally. If it's delta-connected, it needs a 220 volt three-phase line-to-line voltage, whereas if it's wye-connected, it needs a 380 volt three-phase line-to-line voltage.
  $endgroup$
  – Hearth
  Mar 13 at 18:07
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  But where on earth line to line is 220V? In USA it must be sqrt(3)*220 = 190V and in Europe is 380V. Where do you think 220V line to line come from?
  $endgroup$
  – user1999
  Mar 13 at 18:13
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Actually, the common industrial three-phase voltages here in the US are 120V/208V, 230V/400V, 240V/415V and 277V/480V. There are supposedly also 347V/600V systems, but I've never seen one.
  $endgroup$
  – Hearth
  Mar 13 at 18:18
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @Hearth We use 347/600V in Canada. It's commonly found in places where you would se 277/480V in the US. I don't think anywhere in the US uses 347/600V.
  $endgroup$
  – J...
  Mar 13 at 18:55
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Many variable frequency drives put out 220V delta, especially the smaller ones where the input is single phase. I don't know how common such would be at that size but this is sometimes very useful in applications like retrofitting smaller machine tools with a VFD to run on single phase input to the drive.
  $endgroup$
  – Dan Mills
  Mar 14 at 10:51
  

  
  
  
  

 | 
show 8 more comments

8

1

$begingroup$

Regarding the below nameplate of an induction motor:

What is meant by?:

Δ/Y
220/380

Does that mean if delta connected the line to line voltage must be 220V? Im confused also because isnt 220 phase voltage and 380 lne voltage? Could you explain this question with diagram?

motor induction

share|improve this question

asked Mar 13 at 18:01

user1999user1999

426313

$endgroup$

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  The motor can be configured to run on different voltages by changing the way its windings are connected internally. If it's delta-connected, it needs a 220 volt three-phase line-to-line voltage, whereas if it's wye-connected, it needs a 380 volt three-phase line-to-line voltage.
  $endgroup$
  – Hearth
  Mar 13 at 18:07
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  But where on earth line to line is 220V? In USA it must be sqrt(3)*220 = 190V and in Europe is 380V. Where do you think 220V line to line come from?
  $endgroup$
  – user1999
  Mar 13 at 18:13
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  $begingroup$
  Actually, the common industrial three-phase voltages here in the US are 120V/208V, 230V/400V, 240V/415V and 277V/480V. There are supposedly also 347V/600V systems, but I've never seen one.
  $endgroup$
  – Hearth
  Mar 13 at 18:18
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  @Hearth We use 347/600V in Canada. It's commonly found in places where you would se 277/480V in the US. I don't think anywhere in the US uses 347/600V.
  $endgroup$
  – J...
  Mar 13 at 18:55
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Many variable frequency drives put out 220V delta, especially the smaller ones where the input is single phase. I don't know how common such would be at that size but this is sometimes very useful in applications like retrofitting smaller machine tools with a VFD to run on single phase input to the drive.
  $endgroup$
  – Dan Mills
  Mar 14 at 10:51
  

  
  
  
  

 | 
show 8 more comments

$begingroup$

Regarding the below nameplate of an induction motor:

What is meant by?:

Δ/Y
220/380

Does that mean if delta connected the line to line voltage must be 220V? Im confused also because isnt 220 phase voltage and 380 lne voltage? Could you explain this question with diagram?

motor induction

share|improve this question

asked Mar 13 at 18:01

user1999user1999

426313

$endgroup$

share|improve this question

asked Mar 13 at 18:01

user1999user1999

426313

share|improve this question

asked Mar 13 at 18:01

user1999user1999

426313

asked Mar 13 at 18:01

user1999user1999

426313

asked Mar 13 at 18:01

user1999user1999

426313

3 Answers
3

active

oldest

votes

5

$begingroup$

If you take the ratio of line voltage to the phase voltage for a 3 phase system supply you get $sqrt3$ = 1.732. Now 380 divided by 220 is 1.727 (about 0.3% off from perfect) so this informs that if the windings are Y connected, each winding receives 220 volts from a 380 volt 3 phase supply.

Try this picture of a 120 volts/208 volt set-up: -

share|improve this answer

edited Mar 13 at 18:19

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Oh I got it very clear now thanks.
  $endgroup$
  – user1999
  Mar 13 at 18:18
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  But dont you think they wrote in wrong order on the name plate?
  $endgroup$
  – user1999
  Mar 13 at 18:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  They wrote Δ/Y 220/380 but shouldnt it be more correct Δ/Y 380/220 ??
  $endgroup$
  – user1999
  Mar 13 at 18:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  No, if you operate in delta your line voltage is 220 volts because the coils are placed directly across pairs of lines. In star, to get the same 220 volts across each winding, you have a line voltage of 380 volts.
  $endgroup$
  – Andy aka
  Mar 13 at 18:21
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Hmm I guess I need to think about it more
  $endgroup$
  – user1999
  Mar 13 at 18:22
  
  

  
  
  
  

 | 
show 2 more comments

12

$begingroup$

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. Two connection methods.

The windings on your motor can take 220 V between their terminals.

• On a 220 V 3-phase supply you connect as shown in Figure 1b.


• On a 380 V 3-phase supply you connect as shown in Figure 1a.

Note that in each case the voltage across each winding is 220 V while the voltage between the supply terminals may not be.

It is simple trigonometry to show that the 380 V phase to phase voltage is $ sqrt 3 V_p-n $.

share|improve this answer

edited Mar 13 at 18:56

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

$endgroup$

add a comment | 

4

$begingroup$

It is actually quite simple.

It the nameplate states Δ/Y 220/380 this means that this motor is designed and can be connected in delta, if the line voltage is 220 volts. If the line voltage is 380 V then the motor can be connected in star.

This comes from the fact, that the the max allowed voltage per motor winding is 220 volts. In either case the the winding gets 220 volts supply. By connecting this type a motor in delta with line voltage 380 will burn the motor!

When the line voltage is 380V and you want to connected it to delta then the motor nameplate should state Δ/Y 380/660.

share|improve this answer

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

Your Answer

StackExchange.ifUsing("editor", function ()
return StackExchange.using("mathjaxEditing", function ()
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix)
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
);
);
, "mathjax-editing");

StackExchange.ifUsing("editor", function ()
return StackExchange.using("schematics", function ()
StackExchange.schematics.init();
);
, "cicuitlab");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "135"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f427099%2fconfusion-with-the-nameplate-of-an-induction-motor%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

5

$begingroup$

If you take the ratio of line voltage to the phase voltage for a 3 phase system supply you get $sqrt3$ = 1.732. Now 380 divided by 220 is 1.727 (about 0.3% off from perfect) so this informs that if the windings are Y connected, each winding receives 220 volts from a 380 volt 3 phase supply.

Try this picture of a 120 volts/208 volt set-up: -

share|improve this answer

edited Mar 13 at 18:19

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Oh I got it very clear now thanks.
  $endgroup$
  – user1999
  Mar 13 at 18:18
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  But dont you think they wrote in wrong order on the name plate?
  $endgroup$
  – user1999
  Mar 13 at 18:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  They wrote Δ/Y 220/380 but shouldnt it be more correct Δ/Y 380/220 ??
  $endgroup$
  – user1999
  Mar 13 at 18:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  No, if you operate in delta your line voltage is 220 volts because the coils are placed directly across pairs of lines. In star, to get the same 220 volts across each winding, you have a line voltage of 380 volts.
  $endgroup$
  – Andy aka
  Mar 13 at 18:21
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Hmm I guess I need to think about it more
  $endgroup$
  – user1999
  Mar 13 at 18:22
  
  

  
  
  
  

 | 
show 2 more comments

5

$begingroup$

If you take the ratio of line voltage to the phase voltage for a 3 phase system supply you get $sqrt3$ = 1.732. Now 380 divided by 220 is 1.727 (about 0.3% off from perfect) so this informs that if the windings are Y connected, each winding receives 220 volts from a 380 volt 3 phase supply.

Try this picture of a 120 volts/208 volt set-up: -

share|improve this answer

edited Mar 13 at 18:19

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Oh I got it very clear now thanks.
  $endgroup$
  – user1999
  Mar 13 at 18:18
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  But dont you think they wrote in wrong order on the name plate?
  $endgroup$
  – user1999
  Mar 13 at 18:20
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  They wrote Δ/Y 220/380 but shouldnt it be more correct Δ/Y 380/220 ??
  $endgroup$
  – user1999
  Mar 13 at 18:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  No, if you operate in delta your line voltage is 220 volts because the coils are placed directly across pairs of lines. In star, to get the same 220 volts across each winding, you have a line voltage of 380 volts.
  $endgroup$
  – Andy aka
  Mar 13 at 18:21
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Hmm I guess I need to think about it more
  $endgroup$
  – user1999
  Mar 13 at 18:22
  
  

  
  
  
  

 | 
show 2 more comments

$begingroup$

If you take the ratio of line voltage to the phase voltage for a 3 phase system supply you get $sqrt3$ = 1.732. Now 380 divided by 220 is 1.727 (about 0.3% off from perfect) so this informs that if the windings are Y connected, each winding receives 220 volts from a 380 volt 3 phase supply.

Try this picture of a 120 volts/208 volt set-up: -

share|improve this answer

edited Mar 13 at 18:19

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

$endgroup$

share|improve this answer

edited Mar 13 at 18:19

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

answered Mar 13 at 18:15

Andy akaAndy aka

243k11184420

12

$begingroup$

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. Two connection methods.

The windings on your motor can take 220 V between their terminals.

• On a 220 V 3-phase supply you connect as shown in Figure 1b.


• On a 380 V 3-phase supply you connect as shown in Figure 1a.

Note that in each case the voltage across each winding is 220 V while the voltage between the supply terminals may not be.

It is simple trigonometry to show that the 380 V phase to phase voltage is $ sqrt 3 V_p-n $.

share|improve this answer

edited Mar 13 at 18:56

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

$endgroup$

add a comment | 

12

$begingroup$

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. Two connection methods.

The windings on your motor can take 220 V between their terminals.

• On a 220 V 3-phase supply you connect as shown in Figure 1b.


• On a 380 V 3-phase supply you connect as shown in Figure 1a.

Note that in each case the voltage across each winding is 220 V while the voltage between the supply terminals may not be.

It is simple trigonometry to show that the 380 V phase to phase voltage is $ sqrt 3 V_p-n $.

share|improve this answer

edited Mar 13 at 18:56

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

$endgroup$

add a comment | 

$begingroup$

^{simulate this circuit – Schematic created using CircuitLab}

Figure 1. Two connection methods.

The windings on your motor can take 220 V between their terminals.

• On a 220 V 3-phase supply you connect as shown in Figure 1b.


• On a 380 V 3-phase supply you connect as shown in Figure 1a.

Note that in each case the voltage across each winding is 220 V while the voltage between the supply terminals may not be.

It is simple trigonometry to show that the 380 V phase to phase voltage is $ sqrt 3 V_p-n $.

share|improve this answer

edited Mar 13 at 18:56

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

$endgroup$

share|improve this answer

edited Mar 13 at 18:56

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

answered Mar 13 at 18:19

TransistorTransistor

86.9k785189

4

$begingroup$

It is actually quite simple.

It the nameplate states Δ/Y 220/380 this means that this motor is designed and can be connected in delta, if the line voltage is 220 volts. If the line voltage is 380 V then the motor can be connected in star.

This comes from the fact, that the the max allowed voltage per motor winding is 220 volts. In either case the the winding gets 220 volts supply. By connecting this type a motor in delta with line voltage 380 will burn the motor!

When the line voltage is 380V and you want to connected it to delta then the motor nameplate should state Δ/Y 380/660.

share|improve this answer

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

4

$begingroup$

It is actually quite simple.

It the nameplate states Δ/Y 220/380 this means that this motor is designed and can be connected in delta, if the line voltage is 220 volts. If the line voltage is 380 V then the motor can be connected in star.

This comes from the fact, that the the max allowed voltage per motor winding is 220 volts. In either case the the winding gets 220 volts supply. By connecting this type a motor in delta with line voltage 380 will burn the motor!

When the line voltage is 380V and you want to connected it to delta then the motor nameplate should state Δ/Y 380/660.

share|improve this answer

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

add a comment | 

$begingroup$

It is actually quite simple.

It the nameplate states Δ/Y 220/380 this means that this motor is designed and can be connected in delta, if the line voltage is 220 volts. If the line voltage is 380 V then the motor can be connected in star.

This comes from the fact, that the the max allowed voltage per motor winding is 220 volts. In either case the the winding gets 220 volts supply. By connecting this type a motor in delta with line voltage 380 will burn the motor!

When the line voltage is 380V and you want to connected it to delta then the motor nameplate should state Δ/Y 380/660.

share|improve this answer

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this answer

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered Mar 13 at 20:03

intzintz

412

New contributor

intz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered Mar 13 at 20:03

intzintz

412