Railway training

1. PS&EMU directorate/RDSO
VARIOUS POWER SUPPLY SYSTEMS
➢ Self generating system(SG)
➢ End on generations(EOG)
➢ Head on generations(HOG)

2. DEVELOPMENT OF SELF GENERATION SYSTEM (SG)
• The self generation system is invented by “centre for
railway information systems (CRIS)” of the indian
railways, ministry of railways, government of india.
• It is located in “chanakyapuri, new delhi.” CRIS was
establish by indian railway in “1986 July”
• The self generating system is invented key people of
ashvini vaishanaw [Minister of railways],
V.K.Tripathi[chair person and chief executive officer].

3. MERITS OF SELF GENERATING SYSTEMS
• Independent of the iron formation
• Independent of mode of traction
• No additional source of power is required
• It can be designed to specific need of the coach
• The most of the commen types of train , run’s at an average speed of
50.6 km/h

4. DEMERITS OF SG SYSTEM
• Limited capacity of generation, at present 2 x 25 KW per coach
• Power is not generated during standing/slow speed, hence bulky
batteries are required
• High maintenance requirements and poor reliability
• Very poor efficiency (58% only)

5. END ON GENERATION SYSTEM
• The self generation system is
invented by “centre for railway
information systems (CRIS)” of the
indian railways, ministry of railways,
government of india.
• It is located in “chanakyapuri, new
delhi.” CRIS was establish by indian
railway in “2008 Feb”
• The end on generation system is
invented by “Ajay kumer
nigam”[loco pilot present] and
“Sathish shrivastar”[senior assistant,
loco pilot]

6. MERITS OF END ON GENERATION (EOG)
SYSTEM
• High capacity of power source is available, at present 2 x 336 KW
• No need of bulky batteries
• Low maintenance requirement and high reliability as stand by DA set
is available
• Independent of traction system
• Power transmission at 750V with reduced transmission loss.
• Reduced dead weight as compared to SG system
• A train which consists of length 650 meters
• The most of the commen types of train , run’s at an average speed of
75 km/h

7. DEMERITS OF EOG SYSTEM
• Higher cost of energy due to high fuel cost
• Noise/ Smoke pollution and non environment friendly
• Loss in passenger earning capacity due to presence of two power cars with
on-board DA sets at both ends
• Can feed load upto 21 coaches only with existing DA set
• Requires intensive maintenance of DA sets

8. HEAD ON GENERATION SYSTEM
• The self generation system is invented by
“centre for railway information systems
(CRIS)” of the indian railways, ministry
of railways, government of india.
• It is located in new delhi.” CRIS was
establish by indian railway in “2011
SEPT”
• The system run’s the trains hotel load [the
load of air conditioning lights, fans, and
pantry etc] by drawing electricity from
the over head electric lines through the
pantograpy.

9. MERITS OF HOG SYSTEM
• Input supply to hotel load converter is single phase 750 V AC from the transformer of
locomotive
• This would cause the trains to become more cost-efficient and less polution.
• Globally, HOG is an established system of power supply arrangement in trains
• Pollution free and cheaper power from OHE as compared to EOG system and SG system
• Highest reliability as compared to SG and EOG system due to reduced number of
generating equipment
• No irritating noise or smoke
• Low maintenance requirement
• Reduced dead weight as compared to SG

10. • Suitable for diesel as well as electric traction
• Elimination of under-slung equipment like alternator & battery thereby enhanced safety
• HOG type AC coaches shall be interchangeable with EOG type trains
• Charging of battery from alternator requires at least 24 km/h (cut-in) train speed. Operation of SGAC
coach is thus difficult in slow moving
• The trains chaging of battery from alternator requires at least 24km/h
• High efficincy (93%) and low running of the train.

11. ROUTE RELAY INTERLOCKING SYSTEM (RRI)