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)

I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

0 Answers  

---

how to determine ct ratio in ht vcb?

0 Answers   Techno Engineering,

---

What is the Diesel consumption between 82KVA DG Set and 180KVA DG Set for 1 hour.

1 Answers  

---

how many winding in the single phase transformer?

3 Answers  

---

HOW THE OLTC TRANSFORMER SAVE ENERGY IN COMPARISON TO OFF LINE TRANSFORMER AND IS IT ECONOMICAL TO REPLACE THE OFF LINE TRANSFORMER TO OLTC TRANSFORMER

0 Answers  

---

why are the a.c.series motors preferred for electric traction

4 Answers  

---

what is dc system? how getting pulse from rectifier?

1 Answers   ETA,

---

how to convert single phase supply to 3 phase or 3 phase to single..?

7 Answers   Wipro,

---

What is the power factor of an alternator at no load?

0 Answers  

---

11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?

0 Answers  

---

5. What is PMG in Alternators?

11 Answers   L&T,

---

how to control the speed to switched reluctance motor

0 Answers  

---