Answer / nupurpatel

in ac source,frequency is fluctuate
in dc machine frequency is produced constant.. 

Answer / biswa.biswa2010

only one time on this is used in dc series motor.dc series
motor is slow.

Between rotating armature type and rotating field type arrangements which one is adopted for large rated alternators and DC generators.Why there is difference in the choice?

1 Answers  

---

What is transient Phenomenon?

0 Answers  

---

HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

0 Answers  

---

why mostly conductor made by 7 nos wire?

1 Answers  

---

what is motor?

2 Answers   UIU,

---

what is the prinsiple of dc motor and construction and working ,application of dc motor.

0 Answers  

---

. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV?

3 Answers  

---

plz tell me about for how many rating (for 500kva)how much current taken?

13 Answers  

---

how to calculate knee point voltage for pt?

1 Answers   Amec,

---

11 kV line deraction check by an Engineer.

0 Answers  

---

If an induction motor is restarted before its rotor stop rotating, then what will be the amount of current drawn? Is this current will be the same as motor starting current?

5 Answers  

---

typically in power distribution substation. 1- Any idea how would be the graph of capacitor bank consumption verses time through the day . 2- How is the switching ( on and off ) of the capacitor bank, per need?

0 Answers   Siemens,

---