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.

South (VR) end view of MX workshop

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.

MRVC Rake HTC

• Two Handicap Trailer coaches are there in 12 car MRVC rake.
• Compartaments are HC-SL-V.
• HC - 19 seats, SL ( second class ladies )- 74 seats, V- 6 seats + 1.33 T luggage.
• Tare weight:- 37 T, total payload:- 33 T.
• Compressor with air dryer and Battery Box mounted in underframe.
• Grab poles, protective screen etc are of SS.
• Flooring is of SS with moonrock finish.
• Roof and ducts are SS Micromat finish.
• Seats and Backrest- polycarbonate.

Retrofitment Cost

• BHEL Electrics:- Rs 45 lakh

• BHEL transformer:- Rs. 20 lakh

• Silicon Rectifier:- Rs. 5.5 lakh

• Cable trays:- Rs 1 lakh

• Transformer pipelines:- Rs 50,000

• Field Weakening :- Rs 2 lakh

• SS Tubes:- Rs 3.5 lakh

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

Bulk RSP

• PB 2011-12 Item # 1107 :- 96.10 Crore Detailed Estimate under vetting for BHEL electric conversion @ 4.5 Cr/rake for 20 rakes.
  

• PB 2011-12 item # 1110 :- Siemens spares :- Distribution between WR and CR awaited.

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 )
  

Wheel Earthing shunt

Earthing shunt connection is siemens.

Stainless Steel Air Reservoir

• Capacity :- 125 ltrs
• Dia :- 430 mm, Length :- 1060 mm
• Now ICF is sending with 1 Air reservoir in MC.
• These are provided in DTC and TC also.

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
  

Departmental Retrofitment of DC EMU into AC EMU