Answer Posted / bhatt

current carrying capacity of conductor depends on many
factors,
size, shape and material of the conductor, ambient
temperature, insulation and laying method:
As area of the conductor increases current density is
decreasing hence 2.5 times per sqmm. for coer and 1.5 times
per sq.mm may be alright for smaler size conductor but at
400 sq.mm. it may be only around one time as perimeter and
area also affect the current carrying capacity.

Why are short circuit ratings always 16kA,25kA,36kA and 50kA.Who has fixed these?

4282

---

sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

2180

---

why different series of vfds (like allenbradley)are used in industry ?

2308

---

what is automatic voltage regulator?we can control the vlotage by using fuzzy controller in matlab?why we go for fuzzy?

1966

---

PIU how does work?

2443

---

difference between crane drive and line drive.

1916

---

what precautions to be taken while desigining a LT,HT panel. Eg-LT panel PCC panel with ACB installed. HT panel VCB panel with VCB installed. & what is main diffrence betwn IP54 & IP55 construction of panel.

3052

---

for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?

1964

---

how generator avr give to the input?

2003

---

What is icu and ics in Acb and how many time icu or ics passes from breaker?

1559

---

How to test REF relay testing for LV panel as per Kahramaa standard?

4949

---

Define cuttoff frequency?

1077

---

Define the term factor of inertia.

2114

---

what are the applications of PLC?

1977

---

which fault is severe and why?between lll fault and lllg fault which fault is severe and y?

2510

---