3. Power Supply Installation (PSI)
Overhead Equipment (OHE)
Remote Control equipment
◦ RCC [Remote Control Center]
◦ SCADA- [Supervisory Control and Data Acquisition
system]
4. Types of traction system
Advantages of using electric traction system
Types of electric traction
advantages of electric traction
locomotives
Tss , sp , ssp
Ohe equipment
Breaking
submitted by vishwas
5. Action of drawing some thing over a
surface
Or the system which uses electric power
for traction is called electric traction
submitted by vishwas
6. Non electrical traction
1) steam engine drive
2) internal combustion-engine drive
Electrical traction
1) self contained vehicles
2) vehicles which receive electric power
submitted by vishwas
8. Cleanliness
Low Maintenance cost
Less Starting time
High starting torque
High acceleration
High traffic handling capacity
Easy Breaking
submitted by vishwas
10. power
supply
•1500 v dc supply is used
•Both ohe & third rail method can be used
Dc series
motors
•High starting torque
•Smaller weight to H.P ratio
•Low maintenance cost
•High rate of acceleration & retardation
substation
•Fed with 33 to 133 kv 3-phase power supply
•Convert high vtg 1500 or 3000 v ac supply
•Basically contain x-mer rectifier & converter ckts
submitted by vishwas
11. Power
supply
•25 kv electrical power supply is use in ohe
•High vtg is use to reduces the losses in overhead lines
•Because of high vtg is use distance b/w s.s increases
•Third rail method cant be use in ac system
substation
•Sub station is fed to 132kv supply
•This high vtg is converted into 25 kv ac supply
•Sub station in ac system are cheaper
•Basically contain x-mer
•Some times frequency converters are also use at ss
•
Series dc
motors
• In locomotives dc series motors are use
submitted by vishwas
12. I. High Starting torque
II. Low maintenance cost
III. High rate of acceleration & retardation
IV. Easy speed control
Disadvantage
I. Only one disadvantage is the necessity of
locating ac/dc conversion substations at
short distance apart.
submitted by vishwas
13. Advantage of 25 KV AC Traction over 1500
V DC Traction
Reduced requirement of copper, steel for
supports and cement because foundations
are lighter.
Increased substation spacing - 50 to 80
kms as compared to 8 to 10 kms for DC
traction.
There is direct application of industrial
frequency.
submitted by vishwas
25. A short section of insulated dead
over-head equipment which
separates the sectors fed by two
adjacent substations which are
normally connected to different
phases.
submitted by vishwas
29. Contact wire –
◦ cross sectional area - 107 sq.mm.
◦ diameter - 12.24 mm
◦ normal tension – 1000 kg
◦ breaking load – 3905 kg
Catenary wire –
◦ cross sectional area - 65 sq.mm.
◦ diameter – 10.50 mm
◦ Normal tension – 1000 kg
◦ breaking load – 3920 kg
submitted by vishwas
30. DROPPERS
◦ A fitting used in overhead equipment
construction for supporting contact wire from
catenary
BONDS
◦ An electrical connection across a joint in or
between adjacent lengths of rail
(structure bond, continuity bond, cross bond etc.)
submitted by vishwas
32. Modern microprocessor technology and the availability
of efficient and compact power components have
changed that picture. In 3-phase AC locos, the input
(single-phase AC) from the OHE is rectified and then 3-
phase AC is generated from it, whose voltage, phase,
and frequency can be manipulated widely, without
regard to the voltage, phase, frequency of the input
power from the OHE
submitted by vishwas