Answer / mskailash

lighting arrestor design is withstand only 1.5 or 2 times
of system voltage.if lighting is occur voltage and current
level is more it will bypass that voltage and current to
the earth.

Answer / rajnikanth

lightening works on the principle of corona discharge.the
sharp edges of the arrestor gets accumulated with charges
once a lightning of high voltage occurs.these charges are
then passed to the ground.

hi every body i am master student in control engineering and my project is slip control in trains i assumed a Dc motore as traction motor but i don't have characteristics of this kind of motor that is used in train. i want from every body if he or she has the characteristics or information about Dc motor that is used in train give me those information or technical characteristics .

0 Answers  

---

Give me check-list for electrical preventive maintenance of machine tool.

1 Answers  

---

what is magnetizing and demagnetizing current in generator and motor?

0 Answers   HBL Power Systems,

---

in wind mill use 2100 kw asychronous generator ( induction generator ) rotor voltage : 3300,stator voltage : 690, rpm : 1511 type : MRL063E04 ' we check rotor resistance magger value found following. R-EARTH - 00 M.OHM,Y-EARTH-34 M.OHM,B-EARTH- 33M.OHM R-Y: 31 M.OHM, Y-B: 00 M.OHM,B-R :33 M.OHM HOW CAN I TAKE DECISION?pls ans. quickly

0 Answers   Shaifali Rolls,

---

When i went to a interview the interviewer ask me a question for that i cant able to answer him if anyone knows answer me How will you design a capacitor bank for a plant? if my p.f is 0.6 i have to improve it to 0.9 or 1 what kind of steps i have to do? and is there any formula for calculating this?

2 Answers  

---

i have 1500 kva generator how much maximum load avilable of use

1 Answers   Dr Reddys,

---

whta is difference between contactor and breaker.

6 Answers  

---

What is the kva?

2 Answers   Makino Auto, SAL Steel Power, Sapphire Group,

---

How to justify this statement ??? "Capacitors in series provide less capacitance but higher voltage breakdown rating for the combination"

0 Answers  

---

How can we calculate the current if we have load in KVA and if the load in KW then what formula will be use for calculating the current. please give both the formula for calculating the current.

3 Answers  

---

Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

0 Answers  

---

what is at/cm ?

3 Answers  

---