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Anonymous Poster #1

Why The Generators Are Mostly Star Connected ?

07/10/2013 5:34 AM

Generators / alternators having stator windings as star connected mostly what is the reason for having star winding on stator side. The rotor is a permanent magnet rotating with the constant frequency with prime mover. why on the single line / designs we always prefer star connected generators.

Is this due to

Less voltage stress as compared to delta

Differential protection is easy to configure in star
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PWSlack
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#1

Re: Why the Generators are mostly star connected ?

07/10/2013 7:25 AM

...or is it to do with the ability to connect single-phase loads to it? Hmmmm.....

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TonyS
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#2

Re: Why The Generators Are Mostly Star Connected ?

07/10/2013 7:44 AM

Easier earthing arrangements?

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mik23
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#3
In reply to #2

Re: Why The Generators Are Mostly Star Connected ?

07/10/2013 7:47 AM

Do we need earthing on delta gensets ?
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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#4
In reply to #3

Re: Why The Generators Are Mostly Star Connected ?

07/10/2013 8:00 AM

Only if protection against electric shock is a consideration.

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TonyS
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#6
In reply to #3

Re: Why The Generators Are Mostly Star Connected ?

07/11/2013 8:34 AM

Read the question

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tcmtech
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#5

Re: Why The Generators Are Mostly Star Connected ?

07/10/2013 2:05 PM

They are that way for the same reason that my new fiber optic phone, TV, and internet service access point needs a 8 foot ground rod.

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eltech
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#7

Re: Why The Generators Are Mostly Star Connected ?

07/11/2013 10:32 PM

Star, less insulation of windings needed, which will reduce the size of the equipment,.
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electricalexpert65
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#8

Re: Why The Generators Are Mostly Star Connected ?

07/14/2013 11:38 AM

i) Lesser insulation needed between line & earth (only for phase voltage)

ii) Can connect single phase loads

iii) Can earth the neutral and get the benefits of an earthed neutral system.
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electricalexpert65 (1); eltech (1); mik23 (1); PWSlack (2); tcmtech (1); TonyS (2)

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