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

How can we select a capacitor Bank.? i need a standard formula for that.?

3 Answers   ABB, Ace Info, HAL, IKK, MahaGenco,

---

what is a,b,c,d checks diesel generator?

1 Answers   AFMC,

---

what will happen if frequency is below 50 hz?

0 Answers   Student,

---

Draw torque - speed curve and load curve of induction motor? mark operating point ?

0 Answers  

---

-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.

2 Answers  

---

---

in dc shunt generator field is open in running condition what will happen?

8 Answers   century,

---

Explain the role of a car driver as one of a feedback mechanism.

0 Answers   GE,

---

What are the electrical engineer roles and responsibilities in chemical plant?

0 Answers  

---

how calculated Transformer losses.

0 Answers  

---

what main difference betwenn invetter & ups & major difference

2 Answers   ABB,

---

what is the use of reactive power

3 Answers  

---

What is the temperature PROFILE OF A FLUID W. R. T. Distance from a sphere to which it is IN CONTACT which is at constant temp.?

0 Answers  

---