Answer / sheikh

whenever we got 2 or 3 wires which has different polarity
and ready to connect to any electrical appliances but not
completed the path then this called P.D and when path will
be completed via electrically operated appliances and work
is started along with flow of current then it called EMF

Why we are testing a tan delta test in transformer? which purpose conduting that test? and time priode test?

1 Answers  

---

why we use dc motor instead of ac motor?

7 Answers   Air Force,

---

What is UJT PNP, NPN transistor & working principles?

1 Answers   TATA,

---

how to select cable size according to ampere.

1 Answers  

---

For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation

0 Answers  

---

If a earth leakage circuit breaker trips is it possible to tell which house circuit breaker (I have four) is the faulty circuit?

1 Answers  

---

What is the function of electron gun assembly used in crt?

0 Answers  

---

how many test is necessary for 27mva transformer.

3 Answers   HEG,

---

how to check the continuity of a cable with a megger

4 Answers   Metro,

---

what is meant by line voltage and phase voltage in a three phase transformer?

2 Answers  

---

WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

---

what is the aircraft voltage and frequency standard ?

1 Answers   Jet Airways,

---