Answer Posted / mani

Harmonics is the unwanted noise in the electrical supply
and it resulted heating of the electrical equipments and
power losses also can happen.

For electrical designers what are the standard should know? i want learn about this standards. how to get information/reference. anybody help in this regards please.

2109

---

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?

1942

---

why and how voltage sharing in transformer, during magnetic balance test ?

2314

---

What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

1835

---

what is cogging and crawling

2515

---

Define unilateral circuit?

1223

---

Load break swicth maintenance procedure.

1751

---

What is 100% protection of generator? Why 100% is not used but 95% is generally used?

1023

---

Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere

1599

---

why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

3130

---

True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)

1560

---

How does a television work?

2292

---

what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm

5066

---

who invented active elements? plz give me the complte details of active elements...

1831

---

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?

1179

---