Answer / jkgjk

When we insert 3-pin plug in the socket, first longer and
thiker pin touch the plug, which is connected through earth.
This is for human protection from earth fault.

Answer / manju

thicker pin is connected through earth,as v know that as the area of connection (conductor)increses the resistance decrease
R=$L/A. incase of earth fault, current easily flow to earth through thicker earth pin. tis will protect human from shock.

Answer / rajesh tanwar

The earth pin in the socket is longer so that the phase and
nuetral get disconnected first and earth is disconnected
very last to gave a sufficient protection.

Answer / praful nandankar

earth pin is used in socket to prevent the person from
shock.earth pin is thickeras u know that the thickness is
indirectly proportional to resistance.Hence excessive
current flows through the earth pin during abnormal
conditions.

Answer / shivendra

we know that R=p(L/A).So as the area of cross section increases the resistance decreases AND the current follows the minimum resistance path.So in case of fault current excessive current will flow via earth pin thereby saving the human from shock.

1.What is wind span ,wight span and normal span, and what is the difference for 132kv transmission .

1 Answers   PKR,

why power factor occur only inductive load not in resistive ?

8 Answers  

how calculate gd2 of ht motors

0 Answers   Hindustan Copper Limited,

what was the function of the auxillary relay?

3 Answers  

Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

0 Answers  

Is HT capacitor rating connected directly to motor terminals , related to motor no load current?

0 Answers  

Why a transformer is known as a static device?

7 Answers  

what is the difference between earthing and grounding?

6 Answers   Bhel, Wipro,

What is slip in an induction motor?

0 Answers  

while conducting an experiment why we connect the armature rheostat in maximum position and field rheostat in minimum position

1 Answers  

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0 Answers  

why transformer rating is in KVA?

4 Answers   ABB,