WHY IS RESTRICTED EARTH FUALT PROTECTION NEEDED?? WHY CANT DEIFFERENTIAL PROTECTION SUFFICE???

14 Answers  

---

How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?

0 Answers   HAL,

---

what are the advantages of Horizontal isolation breakers v/s vertical isolation breakers in medium voltage switchgear class.

1 Answers   NNN,

---

in a plug point why the hole size at the top is large?

9 Answers   Bhel, TCS,

---

what is mean impedance?

7 Answers   ONGC, Wipro,

---

What are your future expectations from this company and how long do you intend to work with this company if employed?

1 Answers  

---

how do we calculate of transformer in va?what is calculation?

2 Answers  

---

why we need of power factor correction? give advantages

3 Answers  

---

How can we calculate No load and full load torque of electrical machines, i.e. motor or alternator?

1 Answers  

---

advantage and disadvantage of team work?

0 Answers   Ethio Telecom,

---

which relay is better , instantaneous or IDMT relay .

2 Answers  

---

What is the type of electrical earthing recommended in hard rock area

2 Answers  

---