Answer / bhupesh

DC series motor, always!!
because of its high stating torque and speed control..
But now a days, like in Delhi metro squirrel cage induction
motor is used becoz of its compact design, less maintenance
and regenerative current system.
also some improvements are made for better speed control..

Answer / hemlata

Series wound dc motor due to it has low resistance field and armature winding (according to ohms low I=V/R) advantage high current magnetic field inside the motor strong,produce high torque (turning force)

Answer / himabindu

D.C. Series motor since it has a high starting torque

Answer / fulchand mahato

(a) →high starting torque.
(b)→better speed control.
(c)→low maitanance cost.

Answer / surender kumar

Series motors are widely being used in traction systems, due to good starting torque ,speed controlling quality.
In general terms series motors are starting on load and performing great in compare to rest motors.

Now induction motors are also being apply in traction with SCR it is recent development.

What is the Derating factor of power cables when exposed to direct sunlight in (both PVC & XLPE).

1 Answers  

difference between load bus and dead bus?

4 Answers  

During the transients in alternator,the mechanical power input remains almost constant while the electrical power output changes significantly.Why?

1 Answers  

what are the materials used in HRC fuse

3 Answers   Bhel,

Dear sir, please tell me how many day use CTPT transformer

1 Answers   Daya Engineering Works,

why near the transformers, the Jelly(small white colored rocks)are poured.and what are conditions for that?

3 Answers  

I want to make street light with solar system ... What may I do for procedure and how much of estimation for each material ... If any one knows guide me and inform this id : aravindd7@gmail.com

0 Answers   Suzlon,

how to calculate the megger values for motors and cables?

2 Answers   Adhunik,

A two-terminal variable resistor is known as a

1 Answers  

How to set a Zone 1 distance relay for distribution feeder?

0 Answers   Schweitzer Engineering,

Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

0 Answers   Gasco,

why the excitation is necessary to produce the reactive power

2 Answers