Answer / ashish

its a three phase to ground fault. ie R-Y-B with ground
fault.
it is a very rare fault. it may happen if the earth wire
from the tower falls on all three phases at a time. or any
phase conductor broke and fall on other 2 phase conductor
alogwith ground.

in our transmisison sub station why we step down firstly 132kv\33kv then 33kv to 11kv. can we direct step down 132kv to 11kv.

4 Answers  

---

what is the dedicated neutral earth in ups? y its required?

4 Answers  

---

kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased

0 Answers  

---

What will happen if 230V DC motor connected to 230V AC Supply?

15 Answers   Ashok Leyland, BOC, JSW, ONGC, RRB, TRB,

---

What is the formula for finding fault level of generator?

11 Answers  

---

What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

0 Answers  

---

What are electric motors?

0 Answers  

---

What should be the minimum and maximum ohmic value for earthing?

2 Answers  

---

what is unbalanced rotating magnetic field?

1 Answers  

---

Wat is da difference b/w neutral earthing and unearthed system?

2 Answers  

---

what type of motor is used in fan

6 Answers  

---

How can we calculate the capacity of the capacitor bank attached with the Main panel, when we know the capacity of the panel installed in KVA Rating?

2 Answers  

---