Answer / k.prakashchandra

Fusing current for a round wire is approximately is equal to
k d^3/2 Amps.d=dia in mm, k=80 for copper, 12.8 for tin and
59 for Al.Fusing factor =minimum fusing current/current
rating of fuse.This value should be more than one and is
usually two.

Answer / karthik_elec

fuse is calculating with fuse factor, for example,
if u want to protect one equipment, that equipment taking 10 amps, if u put 10 amps fuse, that fuse will operate in 14.5 amps 4 hrs continues running, fuse factor is 1.45, fuse operating current = 1.45(fuse factor)*10(fuse rating). that means 14.5A 4hrs continues running. this is from IEC (INTERNATIONAL ELECTRO TECHNICAL COMMISSION)

what is CT class? depending upon which it is classified?

3 Answers   Siemens,

---

HT and LT cables can be laid on same cable tray

1 Answers  

---

WHY EXCITATION OF SYNCHRONOUS MACHINE IS DC NOT AC

8 Answers   NTPC,

---

what happens when a DC supply is given to AC motor?

9 Answers   Areva, ISMT,

---

What are the main parts of central chiller plant? Explain the function of each stage.

0 Answers   HSL, Shankar Electricals,

---

---

Is MV canble armour can be earthed at both ends?

2 Answers  

---

in Contactor opearation Why there is a difference in the values of the operate and release voltage in case AC supply

0 Answers  

---

what is the maintain in ACB,VCB,MCB,MCCB breakers?

4 Answers   CTS,

---

if 15 kv is grounding directly what will happen?

5 Answers  

---

what is skin effect and why is it absent in DC systems

4 Answers  

---

what is negative phase sequence

1 Answers  

---

WHY ARE THE LT GENERATORS SOLIDLY EARTHED WHILE THE HT GENERATORS ARE EARTHE THROUGH NGR OR NGT??

3 Answers  

---