Main Compressor

• Make:- Knorr Bremse
• Failures:- Oil Leakage and Coupler Slack.
• Failure Mode:- Metal Bellow glued to motor side hub got disengaged. another reason cited by Knorr Bremse was milky oil due to low duty cycle.
• Oil change recommended after 20-30 hrs of commissioning.

Pantograph

Shunk

• Obliqueness on welded cover on air bellows results in failure.
• Flexible shunt burning cases have been observed.
• Weight:-

Stone India

Transformer

Some modifications done:-

• Insertion resistance.
• Oil level sensor.
• Temperature sensor PT100.

Some failures:-

• HT Bushing Plate
• Blower

Central Pivot

Material:- MAFR, Single forged shaft.
Reduction in Forging:- 3:1 in normalised condition.
Mechanical Properties :- T/S 490 Mpa, Y/S 270 MPa, 21% Elongation, Hardness 140 MIN BHN.
Microstructure , and Magnetic Particle Test is also specified from NABL accredited Govt Appd. Lab.

Traction Motor

Failures:-

• Breakage of Modified Cage of DE bearings:-
• Ferrous /non-ferrous content in gear case oil:-
• Servosyn 460RR oil:-

Remedies

• Retrofit Kit for Grease Lubricated DE bearings

Earth Return Brush

Problem of aluminium casting getting broken noticed in these brushes.


PL No. 47453278
Carbon Brush for Earth return brush Holder Assly.
(SMC grade BSQR) to SMC Drg no. 4048900/D
for Siemens AC/DC Siemens EMU rake . PAC to M/S
Schunk Metal & Carbon (I) Pvt Ltd.

Shacku Couplers

Do we carry out magnaflux RDPT on these couplers?

Batteries Used In Siemens Rake

Two trays in the battery box house 5 nos monoblock batteries of 5 cells each.

C Jumpers

19 pins of C jumper transfer important functions like:-

Reverse , Forward, Half Power , full Power, continuity, DC negative, 50% light, Light On/OFF, Fan OFF/ON, Alarm Bell, Overload Indiacation, and ABB open Indication and some are spare also.

Single Pole VCB

• Min presuure;- 3.3 kg/sqcm
• Max pressure:- 3.6 kg/sqcm
• Max time between Successive closing operations:- 30 sec
• Cost :- Rs. 2.4 lakhs

Auxiliary Compressor

• Rated Pressure:- 8.0 Kg/sqcm
• Cylinder Size and Stroke:- 60 x 35
• Displacement:- 150 lpm
• Motor:- 1 HP , 110 V Dc/ 8.5 A
• FAD:- 6 cubic m/ hr
• Speed :- 1500 rpm
• Cost :- Rs 20,000

Auxiliary Motors

• Oil Pump:- 1.5 HP , 240 V , AC, 6.5 A, 400 LPM, 40 Mf. ( Manju )
  

• Rectifier Fan Motor:- 1 HP, 240 V, Ac, 4.5 A, 40 Mf, ( SHI )
  

• Radiator fan motor:- 0.5 Hp, 240 V AC, 4.5 A, 20 Mf. ( GEC, Manju, SHI )
  

• Aux Compressor Motor:- 1 HP , 110 V DC, 8.5 A ( Elgi, CEC)
  

• Main Compressor Motor:-12.5 HP, 110 V DC, 100 A. ( Kirloskar, ELGI )
  

About the EMU fan...

• Sweep :- 450 mm
• Voltage :- 110V DC/AC ( optg range 90-140 V ), 140 V AC ( optg Range 90-170 V).
• Blade :- FRP ( 30 % glass filled)
  
• Wattage :- DC Fan 35 W, AC Fan 65 W.
• Min Air delivery :- 75-85 cubic mtrs / min
• Noise level :- 60 dB
• Weight :- 8 Kg
• Bearing:- SKF