what is the difference in between short time and continuous rating?

1 Answers  

---

Explain difference between aluminium coductor & copper coductor.

4 Answers  

---

Why we are mostly using a single 3-phase transformer instead of three 1-phase transformers?

7 Answers  

---

Differences between 415v ac and 440v ac

3 Answers  

---

i have 400/230v transformer and didnt done the neutral eatrhing. i connected one lamp to one phase and neutral to the earth. but the lamp is not glowing. again i connected neutral to earth and repeated the same. then the lamp is glowing. in the first condition i tested with a line tester also, at that time the tesrer is glowing what is happening i dont know can any one help me?

1 Answers  

---

short circuit test of transformer gives what?

9 Answers   NTPC,

---

in three 3.5 core aluminium ug cable. one cable is used for one phase by shrting R,Y and B wires and other 2 cables used for Y and b phases. balace 3 neutral wires are made common and connected to load. suddenly neutral current was more than line current what is the reason behind this?

1 Answers   DLF,

---

What is the difference between automatic & semi-automatic star-delta starters?

3 Answers  

---

How can we reduce the reactive power consumption of your 12.5 MVA power transformer.

4 Answers  

---

what are the basic concept to design a out door Substation?

1 Answers  

---

why we cant use AC supply products in DC supply?

21 Answers  

---

Where double earthing is required? Is there any power specification to have double earthing?

10 Answers   Delphi,

---