Question { 44942 }

What are the different protection systems used to protect
the transformer internally and externally?

Answer

1) Differential Protection
2) Winding Temp
3) oil Temp
4) Under Voltage
5) Under Frequncy Protection for Higher Range of Power
Transformers
6) Bucholz Protection
7) Pressure reilef Valve
8) Restricted Earth Fault Protection
9) Master Trip (ie Inter Trip )Conected to isolate X'mer
Brom Both Ends

Question { HCL, 38883 }

why earth hole size is biggest in plug point?

Answer

1) Resistivity is less
2) It will not get n the phase or neutral hole
3) It will be easily go into the hole
4) The equipment is first earthed & then it is charged
because the length og earth plug is more than others
5) Look wise it looks good.