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 electrical energy ,power?

2 Answers   ABB,

How Arc Extinguish in Minimum oil circuit breaker and What is the function of Radial and axial vents of turbulator in Minimum oil circuit Breaker Where these vents are exists.

1 Answers  

a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

9 Answers   College School Exams Tests,

i want all question & answers of the written exam

1 Answers   Essar, L&T, MES, RRB,

What is Control & Relay Panel? And Remote Control Center?

0 Answers   L&T,

we have provided 30 nos. relay contacts in panel.I want to know how do we do the numbering for the relay contacts as per any applicable standards

0 Answers  

how snubber circuit works to protect switching devices?

2 Answers   Electrotherm,

a 50hz motor to give 60hz whats happening in motor.what happen the motor.

6 Answers  

What is reactance? what is the function in Auto transformer and why high leakage reactance?

1 Answers  

what are the basic insulation levels & what its Unit

0 Answers  

Why dc shunt motor in lathe, compound motor in rolling mills

1 Answers  

What is the impact of MCCB & MPCB on Distributed Control System?

6 Answers