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

Brushless excitation of synchronous generators and motors

2 Answers   AMIE,

---

Anyone who can recommend an equivalent to Envirotemp FR3 of Cooper?

0 Answers  

---

can i use the six sigma method which is used in management area, in state estimation of power systems?

0 Answers  

---

xpression 'document.FrmQF.myemail' [

0 Answers   ABB,

---

what is the reason for choosing DYn11 in transformer, why not DYn12 or something else

1 Answers  

---

hot water tank,top element 240v across,the bottom 120v across,why?

1 Answers  

---

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

0 Answers   Schneider,

---

what is meant by negative conductor?

2 Answers  

---

what is oti and wti

3 Answers   Jindal,

---

sir i have a car stereo system and there is jack on him so can u tell me a way to find out their power terminals on the jack or on the circuit board"

0 Answers  

---

STATE WORKING OF VACCUM CIRCUIT BRAKER?

0 Answers   ABB, BEML,

---

why the inserting resistance in wound rotor induction motor decrease the starting current and increase the starting torque

2 Answers  

---