Answer / prakash.

First selected for ct ratio in HT panel.1000kva transformer full load current in primary 52.5amps.so ct ratio in 60amps(60/5).
Now relay setting for over current 55amps.
And earth fault setting 0.5amps in ct secondary amps..

Answer / k.prakashchandra

Normally EFR is set at 20% 0f OCR setting.

what is isochronous mod? what is voltage drop mode and p.f mode?

0 Answers   ABB,

---

america 60hz electric supply is used; but india it is 50hz; why? and if we use 60 hz supply what changeg has to be done or all the equipment has to be thrown which has rating of 50hz frequincy

1 Answers  

---

I have 2 Nos of 2500kVA 33/0.415V cast resin transformers. How to decide on ampere rating of HT Panel? Also advise me how many panel RMG i have to consider whether 4 panel ok?

1 Answers  

---

how did the testing of protection relays done through current injection

0 Answers   Bhel,

---

Sir 33kva 2 transformer load 900 amp calc 1800 amp mana jayega

0 Answers   Classic Infotech,

---

---

i am confused about generator. i have generator of 380 KVA that is 304 KW by that formula KW=KVA*0.8... then by this formula I=KW/V*1.732*0.8 the amperes are 528.673. so that is the load which i put on one phase of generator or this is total 3 phase load on Generator.......

3 Answers   Haliburton,

---

in which direction real power and reactive power flow and why???????

3 Answers  

---

what is impedence voltage

1 Answers   Thermax,

---

which type sylbuse involved

1 Answers   BMRCL,

---

what is the purpose of using battery in dg sets, please specify in details.

2 Answers   Balco,

---

use of PIR in ehv breaker

0 Answers  

---

1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors?

2 Answers   Bell, L&T,

---