Answer / gangadhar

in tractoions dc series and separatly excited moters are
used

Answer / guest

both ac$ dc

Answer / ankit

its single phase ac.. with frequency 50/3 Hz...

You can find it written on any delhi metro track... :)

Answer / varma

AC 25 KV 1 PHASE SUPPLY

Answer / amit

to overcome losses dc is transmitted but in electric locomotive it is converted into ac and feed to induction motor which is controlled by VVVF and EMF injection method

what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?

0 Answers  

why ht11kv supply needs discharging during shut down time

1 Answers  

single phase power supply give to separate one steel coup with water, what reaction create

0 Answers   Turbo,

what is meant by slip & where its occur ?

5 Answers   Lanco,

which type of capacitors using in single phase motors

1 Answers   Vishnu Infra,

difference between dol and rdol startors?

2 Answers   Vijai Electricals,

inductance and capacitance may result in periodic reversals of the direction of energy flow,how???

1 Answers  

What is turn ratio of a transformer?

0 Answers  

In case of any eventuality, who is your next of kin?

2 Answers   Edison, Foster Wheeler, GE, GE Energy, HP, Infosys, Koch Industries, Roper Industries, Siemens,

what is back trip and re-trip in protection schemes? why these two? define me the exact function of these two?

1 Answers   Siemens,

What is UPS?

14 Answers   HSL,

How reverse power relay sense the power is reverse in the system.

2 Answers