how to calculate restraing current and operating current for differential protection if 20 mva transformer is OLTC 33 kv/11 kv ? and what should be the type and ratio of CT?

2 Answers   L&T, OPS,

---

What is the value of specific gravity in charged lead acid batteries.

11 Answers  

---

for any load, what happen if we use the cable rating above its normal rating

2 Answers  

---

what do you mean by puncturing of insulator by ice -coating?

2 Answers  

---

presently I am working in private sector.In powergrid interview recruiter asked me why you join this organization.

0 Answers   Power Grid,

---

Brief working principle of stabilizer,application & safety precautions

0 Answers  

---

How much voltage we need to apply in 33kv cable during hipot test of cable

0 Answers  

---

What is the rating of your substation and what are the different types of substations?

5 Answers   Bhel, NTPC, UPPCL,

---

% voltage variation in distribution a)1% b)5% c)10% d)15%

2 Answers  

---

why the transformer neutral give to the earth ?

2 Answers   Jindal, JLL,

---

how to determine Sq.mm size of finolex power cables.

0 Answers   Finolex,

---

what is rated voltage?

1 Answers  

---