alternator spec: http://www.rdso.indianrailways.gov.in/works/uploads/File/SPEC_AC_0013(Rev%202).pdf
We are in habit of using 6
cells ( 12 V) for doing field supply manual of 25 KW alternator in AC coaches in
case of RRU/ERRU failure.
Henceforth
this activity should be done using tap from across 8 Cells ( thus giving 16
Volts approx). This is needed since most of the time
batteries are already drained and we don’t get even 12 V from 6 Cells.
Table below relates train
speed with RPM:-
Speed for Alternator output
|
RPM
|
KMPH
|
Cut in
speed (below which no gen)
|
400
|
22
|
500
|
30
|
|
Minimum
speed for full output
|
930
|
51
|
1500
|
82
|
|
2500
|
136
|
|
2800
|
156
|
