1. A Training Presentation On TRAIN LIGHTING

2. Contents Introduction Train lighting Brushless Alternator RRU
Batteries
Fluorescent Tube Light

3. Introduction
Train lighting plays an important role in Indian Railway. Although first train ran on 16th April 1883 from Mumbai to Thane, train lighting system came to Indian Railways only by 1930.
Brushless alternator supplies the load when train is in motion and charges the batteries. The batteries supply the load when train is stationary.

4. System of Train Lighting
Axle Driven System
Mid On Generation System
End On Generation System

5. Axle Driven System
In this system 4.5 KW brushless alternators are driven through V-belts from axle.
Lead acid batteries 11O V, 120 Ah arranged from 3 cell Mono Block units.
An external battery charging terminal (BCT) is provided to charge the battery from external charger, if battery is in rundown condition due to failure of alternator.

6. 110 V DC TL System

7. Brushless Alternators
Approved manufacturers for the alternators are:
KEL (Kerala Electrical & Allied Engineering Industries)
BEACON ( Best & Crompton)
SIL ( Stone India Limited)
HMTD Engineering 
CGL (Crompton Greaves Limited)

8. The ratings of Alternator in use are:-
3.0 KW, 120 V for MG non-AC coaches.
4.5 KW, 120V BG non-AC coaches.
12.0 KW, 120 V for MG AC coaches.
18.0 KW, 130 V for BG AC coaches (old).
25 KW,130V, alternator for BG AC coaches (new).

9. Rectifier Cum Regulator Unit
RRU is connected just beside the alternator to rectify the output of the generator.
A magnetic amplifier is connected which convert the 3-phase input to 110 V DC
A safety fuse of 10 amp is connected to prevent the RRU box from abnormal conditions.

10. Functions of RRU
Rectifying 3 phase AC output of alternator to DC using full wave rectifier bridge.
Regulating the voltage generated by alternator at set value.
Regulating output current at set value.

11. Components of RRU
Three phase bridge output rectifier consisting of six silicon diodes D1 to D6.
Single phase full wave field rectifier diodes D16 and D17.
Two sensing diodes (D19, D20 for current/voltage sensing).
Current transformer.
Field transformer.

12. Components of RRU

13. Batteries Conventional Lead Acid Cells for TL applications are used.
The output of the RRU is given to battery box to charge the battery.
BCT is provided for external charging of the batteries at stations or maintenance lines.

14. Construction of VRLA Cell

15. Fluorescent Tube Light
It is a 2 feet long,18 Watt fluorescent tube light provided in the coach for the sitting gallery light and 11 Watt for toilet light.
It works at 110V DC supply.
It gives good light with 30% and 70% power supply.

16. Thank You !!