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Hi Midhat Mahabub Shishir,

There=E2=80=99s a reason behind= that =E2=80=94 actually, three strong ones.

1. To Handle load Imbalance

=E2=9C=94=EF=B8=8E In = distribution systems, especially at the low-voltage side, loads are rarely = balanced.
=E2=9C=94=EF=B8=8E If we used a star=E2=80=93star transfo= rmer, any imbalance on the LV side would directly disturb the HV side.
&= nbsp;=E2=9C=94=EF=B8=8EA delta winding on the HV side provides a path for c= irculating currents that balance the system and prevent voltage distortion.=

 
 

2. To Suppress Triplen Harmonics=

=E2=9C=94= =EF=B8=8E Third-order and multiple-of-three harmonics tend to circulate wit= hin a closed delta winding instead of propagating into the network.
=E2= =9C=94=EF=B8=8E This natural filtering effect improves power quality and pr= otects connected equipment from harmonic interference.

 
<= td align=3D"left" valign=3D"top" bgcolor=3D"#111118" style=3D"vertical-alig= n: top; line-height: 1px; padding: 0px; font-size: 1px; background-color: #= 111118;"> 
<= td align=3D"left" valign=3D"top" bgcolor=3D"#111118" style=3D"vertical-alig= n: top; line-height: 1px; padding: 0px; font-size: 1px; background-color: #= 111118;"> 

3. To Isolate Grounds Faults

=E2=9C=94=EF=B8=8E When a si= ngle line-to-ground fault occurs on the LV side, the delta winding blocks z= ero-sequence currents from flowing into the HV system.
=E2=9C=94=EF=B8= =8E That means a ground fault in your local distribution network won=E2=80= =99t appear as a fault on the grid side =E2=80=94 ensuring system stability= and safety.

So the next time you see a pole-mounted or indoor distr= ibution transformer, remember =E2=80=94 it=E2=80=99s not =E2=80=9Cjust=E2= =80=9D delta=E2=80=93star because of tradition.

 
 
 

It=E2=80=99s a deliberate engineering decision balancing harmonics, gro= und faults, and reliability.

=F0=9F=8E=93If you want to learn etap b= asic check out my etap for beginners course=20

Read More
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For S= upport Contact
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