Answer / pillay

It is armoured.to arm is to protect against harm. So
armoured cable is cable with some kind of protection like
steel wire, copper tape, lead covered, pvc, xlpe, or steel
conduit or some other type.In unarmoured cables it is
unprotected cables other than electrical insulation.Than the
user decides to provide the necessary mechanical protection
as necessary.

What is the operating range of voltage and current in grid supply in India?

4 Answers   BARC,

---

Can the efficiency of transformer be measured with the help of wattmeter readings taken at primary and secondary side? Support the answer.

2 Answers  

---

How feedback transformer works to feedback power in Slip Power Recovery System

2 Answers  

---

which circuit takes max. load & which circuit takes min. load i.e. SERIES CIRCUIT OR PARALLEL CIRCUIT??

3 Answers  

---

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

6 Answers   Enercon,

---

how many safety really of DG sets.

0 Answers   MBD, Nerolac,

---

can a 150 kva 3 phase 440v/230V delta-wye step down transformer can be use as step up transfoermer with connected loads at 440v side?

0 Answers   RD Square,

---

At what voltage domestic tubelight works?

2 Answers   Cigfil, L&T, MNC,

---

Why is the diffrential protection in DG. What if the CT polarity is reversed while connecting for the same type of protection? How polarity can be made ok?

1 Answers  

---

1.What is isolators and bus bars?give answer in details

2 Answers  

---

How to run a three phase motor into single phase........

0 Answers   Oil India,

---

Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

0 Answers  

---