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DC EMUs

S.N.
Modification sheet No.
Brief description of modification
Reference & date of issue
1.     
Provision of duplicate circuit for passenger alarm bell on EMU stock.
24.07.1978
2.     
Provision of indication lamp across the passenger alarm bell on EMU stock.
24.07.1978
3.     
Use of silicon blocking diode instead of slelnium stack in the control circuit of DC Emu.
09.01.1979
4.     
Provision of blocking diode in main lights and fan circuit.
22.09.1979
5.     
Introduction of current balance relay in the power and auxiliary circuits of DC EMU.
07.10.1980
6.     
Modification of the schematic on 1500 V DC EMU with BHEL equipment.
15.04.1981
7.     
Provision of incomplete sequence relay for the protection of starting resistance.
13.12.1990
8.     
Modification of head light circuit on DC EMU for DC-DC converter replacing series resistors in head light lamp.
30.09.1994
9.     
Improvement in ventilation and air circulation in DC EMU coaches.
10.07.2003

AC EMUs

10.  
Modification to the schematic of AC BG EMUs with BHEL traction equipment.
May-1982
11.  
Modification to the traction control feed on EMUs.
30.11.1982
12.  
Provision of metal oxide varistor (MOV) across auxiliary winding of AC input to aux. Rectifier bridge feeding compressor motor in BG AC EMUs
30.09.1994
13.  
Modification in head light circuit for DC-DC converter replacing head light stabiliser on AC EMUs.
30.09.1994
14.  
Modified circuit for protection of PFD resistance in BG AC EMUs.
30.09.1994
15.  
Modification of M/s Everest make EMU battery charger.
30.09.1994
16.  
Increase in out put voltage setting of Everest make EMU battery charger.
30.09.1994
17.  
Modification to the mounting arrangement of condenser bushing for 25 kV AC EMUs.
30.09.1994
18.  
Provision of additional parmali wood cleats to support LT bus bar of BHEL built BG AC EMUs.
30.09.1994
19.  
Replacement of existing rubber stopper supporting panto pan to new position under the upper articulation to tube.
30.09.1994
20.  
Relocation of existing rubber stopper supporting panto pan to new position under the upper articulation to tube.
30.09.1994
21.  
Provision of new slotted bar with increased threaded length to arrest extension of pantograph beyond 2 meter height.
21.05.1986
22.  
Provision of panto raising spring catcher to h old the spring in case of breakage.
21.05.1986
23.  
Provision of rubber bush inside the open end of longitudinal tube of AM 12 type pantograph.
19.09.1998
24.  
Modification support bracket for DJ control cable.
Aug. 1977
25.  
Modification to servomotor sleeve of AB type 301205
Jan 1980
26.  
Modification to stay bolts of circuit breaker type 301205
Jan 1980
27.  
Provision of series resistance with MTDJ coil of DJ type 301205
Dec. 1980
28.  
Modification to CMP formation in spring loaded sleeve of ABB.
Nov. 1982
29.  
Provision of series resistance with MTDJ coil of DJ type 301205
Mar. 1998
30.  
Replacement of incoming steel braided flexible pipe by flexible reinforced rubber pipe connecting to VCB/ABB.
10.03.1998
31.  
Replacement of existing latch type of fixing arrangement with bolted design of cradle cover of VCB type 20 CB.
22.05.1998
32.  
Replacement of existing push button switch for light and fan contactor with higher rating push button switches on BG AC EMUs and MEMUs.
2001
33.  
Provision of additional flasher light switch to driver’s side switch panel in the driving cab AC & DC EMU and MEMUs
2001
34.  
Provision of traction motor weak field arrangement in MEMUs.
06.06.2002
35.  
Provision of hood arrangement for Switzer make air flow relay on AC BG EMU and MEMU.
11.06.2002
36.  
Provision of hood over the horn in all DC and AC EMUs and MEMUs
14.06.2002
37.  
Paralleling of N/O interlock of limit switch of BL key board in AC EMUs and MEMUs
14.06.2002
38.  
Provision of unit fault indication lamp in all AC EMUs and MEMUs motor coaches.
14.06.2002
39.  
Provision of flexible shunt in over load relay.
14.06.2002
40.  
Modification of guard supply indication lamp in AC EMUs and MEMUs
 
41.  
Reliability improvement of driver indication panel in DC and AC EMUs and MEMUs.
17.06.2002
42.  
Reliability improvement of gang type signal bell in DC and AC EMUs and MEMUs.
17.06.2002
43.  
Cooling of battery charger.
17.06.2002
44.  
Modification of cab fan circuit in AC EMUs and MEMUs.
05.09.2002
45.  
Shifting of main compressor suction filter.
16.09.2002
46.  
Burning/overheating of transition resistor (RTC)
03.06.2003
47.  
Modification of LTR circuit in AC EMU and MEMUs
04.06.2003
48.  
Modification of interchanging the position of inter cooler unit and compressor motor unit of M/s Elgi in BG AC EMU/MEMU.
18.06.2003
49.  
Improvement in ventilation in AC EMU coaches.
24.06.2003
50.  
Modification to rubbing of jumper cables with vestibule of adjoining trailer coach in middle motor coaches of MEMUs.
27.05.2004
51.  
Provision of T-strainers with sintered bronze filter in pneumatic pipeline of EP contactors in AC EMUs and MEMUs.
14.06.2004
52.  
Provision of Nomex sheet below two way connector of carriage fan.
18.11.2005
53.  
Automatic switching ‘ON’ of flasher light in case of emergency situation.
20.03.2006
54.  
Interlocking between motor man and guard for starting of EMU train.
08.01.2010
55.  
Modification in internal circuit of simplified battery charger of AC EMU/MEMU motor coach
18.11.2011
 56. RDSO/PE/MS/EMU/0066– 2013 (Rev. ’0’) Modification in the VCB pipeline of AC EMUs/MEMUs motor coaches 06.09.2013
 57. RDSO/PE/MS/EMU/0067–(Rev. ’0’)-2014 Modification in the electrical circuit and pneumatic pipe line of air dryer of AC EMU / MEMU Motor Coaches 31.01.2014
 58. RDSO/PE/MS/EMU/0068–(Rev. ’0’)-2014 Enhancement of the current rating of compressor governor (CG1) micro switch of AC EMU/MEMU Motor Coaches 31.01.2014
 59. RDSO/PE/MS/EMU/0069-(Rev.’0’)-2014 Modification in the Traction Control Circuit of AC EMU / MEMU Motor Coaches 24.03.2014



Source : WELCOME TO RDSO CMS Team Last Reviewed on: 28-03-2014  

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