Answer / k.prakashchandra

Voltage ratio is not applicable when the secondary of the Tr
is short circuited.Actually the secondary of CT has more
turns than the primary.No voltage is applied to primary of
CT and a small voltage is induced in secondary due to the
mmf created in primary by the current flowing through
it.When this emf of secondary is short circuited , the
current produced is proportional to the current in the
primary.That is why it is called CT and not just Tr.

Answer / peter b

Current and voltage and still inversely related in a CT.
However, the primary of a CT does not see the full line
Voltage i.e. a CT on a 110kV bus does not have a primary
Voltage of 110kV! The CT's primary is in series with the
main load; the primary voltage of the CT is simply the
induced Voltage due to the AC flowing through the primary.
This Voltage is only a tiny fraction of the full line
Voltage. The only insulation requirement is that the CT as
a whole be insulated from neutral/earth. That's why they
are mounted on long insulators.

What is the function of neutral CT in transformer? Turn ratio of typical CT for 2MVA transformer ? or relation between full load current of transformer and neutral CT ?

1 Answers   Electrical Inspectorate,

---

how calculate the current faut level

2 Answers   ABB,

---

Whether the Dc motor Droping the power factor like AC motor if lot of motor running in factory is it necessary to connect capacitor bank

2 Answers  

---

FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

0 Answers  

---

Why the motor was take the starting current is high?

3 Answers  

---

Why Capacitor & ignator used in MH lamp

2 Answers   Bell,

---

A 230 v dc series motor is connected to 230 V ac supply, then

1 Answers  

---

why armature is placed in stator but not in rotor in synchronous generator ?

2 Answers   Student,

---

what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

0 Answers   DVC,

---

why the crow do not feel the current in overhead line when it sits on the wire??????

6 Answers  

---

What happen if 1200KW/1500KVA alternator runs at no load and high R.P.M.for one minute?

6 Answers  

---

what is ripple component in ac supply?

2 Answers  

---