Answer / yogesh

10 % increase in voltage gives you 50 % increase in
excitation current is called knee point voltage.

Answer / pundlik wanwe

for getting knee pint voltage of CT following is the procedure.
voltage source is connected to the CT secondary and slowly voltage is increased. milli ampere current is measured in the secondary circuit. at initial increase in current will be linear with voltage which is operating range. if again the voltage is increased further, at some point 10% increase in voltage causes 50% increased in current. this point is called Knee point of CT. Knee point is very important for the protection CT as after this point CT core is on the verge of saturation, which is not healthy region for protection.

What is effect of over voltage and under voltage on ACB

0 Answers   EFS,

---

Why there is not any reactive power in DC although it causes magnetic field.

7 Answers  

---

what is meant by frequency ?

10 Answers   TCS,

---

ro plant grundfos bm30type pump.we start the pump using siemens 3rw 4423-1bc44, 30kw soft starter. bur its failier frequently. so we planed to change the dol starter. sp please tell me any budy its possible or not翿შ†

1 Answers  

---

What is the megger value for ht

16 Answers   Electrical,

---

what is meant by MCB and MCCB? and what its full form?

7 Answers   Bajaj, JHM Hotels,

---

how to decide choke rating for drive?

0 Answers   Reliance,

---

I want to do a mini project. Now I'm studying in 6th semis tor EEE Engineering.

0 Answers  

---

Distribution Transformer are connected in configuration? a. Star/delta b. delta/star c. star/star d. delta/delta

7 Answers   IPR, Maruti Suzuki,

---

is it possible to test of bus bar in high rise building without completed full floor ?

0 Answers  

---

What is it mean Transformer 100/133MVA Power Transformer, significance of 100/133 MVA and 230/115KV please

3 Answers  

---

what is the frequency standard with tolerance level for India?

16 Answers  

---