Answer / ahmed rahman

in this connections for over current protection,i have a strange theoretical question.
we all see the common wire of the cts secondaries.
in this wire , the 3 currents of the 3 phase pass through it,
i want to know how each current goes back to it's ct without going to another one however it has a way to pass through !
..the second part of my question,,this earth connection also to the secondaries of the cts, why the current doesn't pass through it?? what prevents it? it acts as a short circuit to the earth !!!

http://www.electrical4u.com/images/backup-protection01.gif


http://www.sayedsaad.com/montada/attachment.php?attachmentid=125929

an ac induction motor gets overheated when operated at a low frequency of 25 hz a instead of 50 hz. reason?

1 Answers  

---

What are the advantages of individual drives?

1 Answers   A1 Electricals, Suzlon,

---

why in crona effect it give violet colour.

1 Answers  

---

AIR GAP IS TERMED AS USEFUL. WHY?

5 Answers  

---

exolain the star delta connection

0 Answers   Toyota,

---

---

what is the method of electric earth for the protection of low voltage electric equipment

1 Answers   MacLellan, Shiva Corporation, Siemens,

---

How to apply 'c' license and also explain what is difference between 'c' and 'b'license.i am also working in one of the private company.i have finished my diploma in 2014 .i have already finished in ITI electrician course.....

0 Answers  

---

What happens if we run alternator on under frequency? 

0 Answers   SRHHL,

---

What will be the direction of rotation of a Alternator in case it goes in motoring action when connected with grid ?

6 Answers   DVC, NTPC,

---

basic priniciple of induction motor

2 Answers   Electronics, Ramco,

---

why the transmission side of the generating transformer is always star??

5 Answers  

---

Why do we need ring main unit (RMU). what is its purpose and its advantages . what is the operating function of rmu

6 Answers   MahaDiscom,

---