Can u explain : what is supply for train (whether a,c or d.c
).I know that supply is 25000v a.c .But there is rumour that
supply is D.C.
And also explain how lights and fans inside the trains are
working ,and what type of motors are used in trains whether
D.C motors or induction motors .If d.c motor, how it gets
supply.If traction motors are used then what are traction
motors and its functions and how it differs from other
motors and also explain about locomotive .
please reply..............
- 9 Answers
- 20076 Views
- NTPC, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / sandippatel2310
all indian trains run at 25 kv ac. only in mumbai church
gate area d.c system is still in use.
Lights and fans run at 110V DC system through batteries
under the coaches.
Locomotive uses DC series motor, 25KV is stepped down by
transformer and converted to DC by rectifiers inside the
locomotive itself.
Induction motor not used
DC series motors are used as they have high starting torque.
| Is This Answer Correct ? | 43 Yes | 1 No |
Answer / sharan dilip
dc shunt motor are never used for traction.
it has drooping characteristics of Torque Vs Speed hence dc
shunt motor is not employed.
The characteristics of dc series motor suits best for that
application. its better if you observe the characteristics
of dc series motor.
| Is This Answer Correct ? | 13 Yes | 0 No |
Answer / kans
25000v ac system,bt rectifier unit inside loco, dc series
motor is there.
| Is This Answer Correct ? | 11 Yes | 8 No |
Answer / y.hari kishore babu
Trains opreating voltage is 25 KV, DC series motors are used
in traction. All lights, Fans are operated at 110VdC supply.
| Is This Answer Correct ? | 10 Yes | 7 No |
Answer / veer thakur
All the fans and tube light of train are started on 110 v dc dupply and use universal motor in the fan
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / sharan dilip
Its good question.
But for a motor the mechanical characteristics (T Vs N) are
concentrated.and even though the if the load increases the
speed would decreases for shunt motor.But in the case of dc
series motor both armature current and field current are
same and at much higher loads also the torque can be maintained.
For dc series motor we operate in such a circumstances such
that at constant torque and variable speed.
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / ganeshkumar1453
but in torques and speed characteristics of d.c series motor is parabolicly decreases na .y we should see the characterisitc between torque n speed
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / ganeshkumar1453
Sir Sandip patel
u have D.C seies motor is used in locomotive . Can u explain what is locomotive.More over D.C series motor is used as boosters,it cannot maintain constant speed na.So D.C shunt motor is used na please reply.
any one can rpy...
| Is This Answer Correct ? | 0 Yes | 4 No |
Answer / ganeshkumar1453
Above question continuation
y d.c seried motor in train.trains r driven by D.C shunt motor right at what voltage
| Is This Answer Correct ? | 0 Yes | 7 No |
what is the signification of trivector meter? why its name is trivector meter ?
what is meant by poly phase induction motor ? how its operating by single phase or three phase?
How feedback transformer works to feedback power in Slip Power Recovery System
What is protection for single phasing ?
The power dissipated by a resistor of 10ohm when a current of 2A passes through it is:(a) 0.4W(b) 20W(c) 40W(d) 200W
when two gen set runing in parallel but thay have diffrent pole pitch, then what will be happan
why inductancce of armature inductance of dc machines is neglected?
why we are using R,Y,B colours for 3 Phase ?
What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?
why fuse not recomended to neutral
11Kv Dog conductor 6/0.186 formula Line Losses ? Length 4.85Km amper ..? 52 Pole Max Load 3200Kw
what is an S.C.R. and how do they work?
-
Civil Engineering (5085) - Mechanical Engineering (4451)
- Electrical Engineering (16632)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
