IRCAMTECH/M/GWL/Dual cab 51 Keep the following switches and Circuit Breakers as shown in table 2 to work from CAB#2 as driving cab. Table 2 15. TFT LCD Display Introduction The multifunction TFT LCD display for loco pilot's cab type MDS740 is used in locomotive as man machine interface for guiding the operator to control the locomotive. It communicates with the Microprocessor based Locomotive Control System through RS485 link. It displays the data sent by the Microprocessor based Locomotive Control System in symbolic as well as text format. The data received from the microprocessor based locomotive control system is displayed on analog circular dial with indicator hand, Linear dial with an indicator hand, Linear dial without indicator hand, Simple numerical value in designated place. The information about the status of inputs and outputs are received from the locomotive control system is displayed as different colored LEDs on the display screen. The fault messages, maintenance remedy
IRCAMTECH/M/GWL/Dual cab 52 messages, any other relevant information is displayed in the specified display area in the simple text format. Also, it receives data from the operator through inbuilt keyboard for configuration and operator related parameters. TFT LCD is available for both locomotive operation and locomotive service functions. Locomotive operation includes certain service-related procedures, such as traction motor cutout and fault reset. All self tests can conduct from Active Cab Displays. 1. Operation – Locomotive crew members can only use Crew Message screens to monitor unusual operating or fault conditions and TM cutout or reset faults. 2. Service – Maintenance personnel can use two types of screens: Crew Message screens to examine fault conditions. Main Menu screens to load test the locomotive, self tests for certain locomotive systems, meter screens and other trouble shooting through fault data. The display screens are programmable and the layout of display screen can be customized to suit various locomotive models. Viewing of any screen from any display is possible in both Cabs. System related settings like Test Modes, Crew Reset, Fault Reset, Trip data settings and TM's Disable are possible from Active Cab Display only. Power ON When Computer Control CB kept in ON, TFT LCD gets 74V DC power from loco battery. TFT Display is single board computer, takes 60 seconds for initialization and if any Crew messages or Fault messages are found in the system, the concerned screen is displayed or else Main Menu is displayed after initialization. When Application starts, it takes 60 secs time for loading the application. After loading, the communication link check is initiated, if the communication is OK, then Default screen is displayed.
IRCAMTECH/M/GWL/Dual cab 53 All TFT screen's dimensions are 800 X 600 (Best fit resolution). The default screen is given in screen 1. Default Screen Screen1
IRCAMTECH/M/GWL/Dual cab 54 In general the screen navigation and hot keys are as given in table KEYS FUNCTIONALITY 1 Main Menu Screen can be selected by pressing No.1 key 2 Crew Messages Screen can be selected by pressing No.2 key 3 Driver ID entry Screen can be selected by pressing No.3 key 4 Train No. entry Screen can be selected by pressing No.4 key 5 Train Load entry Screen can be selected by pressing No.5 key 6 Section name entry Screen can be selected by pressing No.6 key 7 Settings Screen can be selected by pressing No.7 key 8 Data Meters Screen can be selected by pressing No.6 key 9 Not Applicable 0 Print port data can be taken by pressing No.0 key C Navigate to Previous Screen can be done by pressing \"C\" key ◄ (Left) Used to navigate the left menu options in the Menu Screens. ►(Right) Used to navigate the right menu options in the Menu Screens ▲ (Up) Used to Move Up in menu Screen ▼ Used to Move Down in menu Screen (Down) E Enter Key shall Display the selected Screen M Display the Default Screen F Displays All Faults Active screen Table 1: Keys Functionality in the Default Screen
IRCAMTECH/M/GWL/Dual cab 55 Main Menu Screen Screen 2 User Programmable Screen: In this sub menu 8 user programmable screens are given as shown in screen 2 to select the required parameters to view the status. The default screen is pre defined parameters for Loco-pilot to view the status of Loco condition on run. In this screen status bars given for some parameters like Brake Pipe Pressure, Brake Cylinder Pressure, Equalizing Reservoir Pressure, MR Pressure, Battery Charging / Discharging Status and Air Flow Indicator.
IRCAMTECH/M/GWL/Dual cab 56 Data Meters Screen Any screen can be selected by pressing keys from 1-9. Screen 3 Key functionality in the Data Meters Screen KEYS FUNCTIONA 1 Motoring & Dy.Brake Screen can be selected by pressing No.1 key 2 Aux. Gen., Excitation & HP status Screen can be selected by pressing No.2 3 Starting & Cooling system Screen can be selected by pressing No.3 key 4 TM1&2 Parameters Screen can be selected by pressing No.4 key 5 TM3&4 Parameters Screen can be selected by pressing No.5 key 6 TM5&6 Parameters Screen can be select by pressing No.6 key 7 CCB & DPC status Screen can be select by pressing No.7 key 8 Spare 9 Spare 0 Not applicable Table 2: Keys Functionality in the Data Meters Screen
IRCAMTECH/M/GWL/Dual cab 57 Self Tests Menu Screen Screen 4 Self Tests sub-menu screen is selected by pressing key 3
IRCAMTECH/M/GWL/Dual cab 58 Auto Tests Screen From Self Test Menu Screen 5 From Self Tests Menu Auto Tests can select by pressing No.1 key Air Brake Self Test From Auto Tests Screen 6 Press 1 key to perform the Air Brake self test
IRCAMTECH/M/GWL/Dual cab 59 Follow the Entry conditions to perform Air Brake self test as shown in screen 7. Screen 7 Then the screen appears with message “Air Brake Test is going on...” as shown in screen 8. Screen 8
IRCAMTECH/M/GWL/Dual cab 60 Then screen shows “Air Brake Test is Success” message as shown in screen 9. Screen 9 Load Test Screen From Self Tests Menu From Self Tests menu, select Load Test option by pressing 4 Key as shown in screen 10. Screen 10
IRCAMTECH/M/GWL/Dual cab 61 Then the screen shows Load Test Conditions as shown in screen 11. Screen 11 Then the screen shows Load Box Test screen as shown in screen 12. Screen 12
IRCAMTECH/M/GWL/Dual cab 62 In this screen, user can view all parameters that are related to Engine Efficiency, Main Generator, Aux. Gen., Grid path 1&2, Cooling Fans status, LT1 and LT2. KEYS FUNCTIONALITY 1 LT2 Screen can be selected by pressing No.1 key 2 Crew Messages status Screen can be selected by pressing No.2 key 3 Data Meters Screen can be selected by pressing No.3 key 4 Not applicable 5 Not applicable 6 Not applicable 7 Not applicable 8 Not applicable 9 Exit from Load Test by pressing No.9 Key 0 Load Test Screens Print port data can be taken in to Laptop by pressing this key Table 3 The Keys functionality during Load Box Test is listed in table 3. Screen 13
IRCAMTECH/M/GWL/Dual cab 63 TM Cutout from Settings Menu To select Settings menu screen, press 9 key on the Main Menu screen as shown in screen 13 To select TM Cutout, press 1 key in Crew Menu as shown in screen 14. Screen 14 Then TM Cutout Mode status screen appears as shown in screen 15.
IRCAMTECH/M/GWL/Dual cab 64 Screen 15 TM Previous status, Current/Changed status shows as in screen 16, then press enter to change the status. Screen 16
IRCAMTECH/M/GWL/Dual cab 65 Fault Archive Fault Archive sub-menu is selected by pressing 3 key as shown in screen 17. Screen 17 Entire Archive faults are selected by pressing 1 key as shown in screen 18.
IRCAMTECH/M/GWL/Dual cab 66 Screen 18 Then Entire Archive menu with faults are displayed as shown in screen 19. Screen 19
IRCAMTECH/M/GWL/Dual cab 67 16. Advantages And Salient Features Of Dual Cab Locomotives The Advantages and Salient features of Dual Cab locomotive are given below: 1. Better visibility to loco pilot while driving as one can drive from both the cabs. 2. All the information required for running the locomotive is available on the TFT LCD display which is in front of loco pilot and assistant loco pilot in both cabs, unlike VFD display which is located behind the loco pilot when working from short hood control stand in existing locomotive. 3. TFT LCD display on each control console displays the data sent by the Microprocessor based Locomotive Control System in symbolic as well as text format. 4. Similar arrangement of controls in both cabs for easier operation of locomotives, additional controls given to Assistant loco pilot such as Horns, Emergency brake valve for better control of locomotive. 5. Widely used BL key based selection of Active control Cab safety aspect, which is similar to Electric locomotive. 6. All necessary switches and breakers are duplicated on ECC#4 of CAB -2 also. 7. In each cab, two TFT displays are provided, one can see all parameters on displays of both CABs simultaneously. 8. Recycling of LCC and CCB system is given in both CABs. 9. Locomotive can be isolated from any CAB. 10. EFCO switch and MU Engine Stop switch are provided in both the CABs to shutdown the engine from any CAB. 11. Fuel Prime/Engine Start switch is provided in both the CABs in parallel. From any CAB Engine starts. 12. In each CAB, provision is given to insert BL Key. If BL key is ON in any one CAB, that is treated as Active CAB. If BL key is inserted and kept in ON position in both the Cabs or BL key is not inserted in both the Cabs, then system is isolated and corresponding “Crew Message” is displayed. 13. Generator Field CB is provided in both the Cabs in parallel. In active CAB, CB should be closed and in Inactive CAB, this CB should be open. If both are made ON simultaneously, the excitation is cut off and locomotive goes to “No Load” condition with appropriate message.
IRCAMTECH/M/GWL/Dual cab 68 14. GRNTCO SW: This switch is provided in both the cabs. If both the switches are closed then only system gets the digital input and treats GR protection scheme is enabled. 15. Dual Cab locomotive (WDP4D) is a prestigious product for Indian Railways. 16. From Indian Railways history, this is the first locomotive with two cabins in 4500HP diesel type of locomotive. 17. Dual cab locomotive is 2.5 meters longer compared to normal WDG4/WDP4 locomotives. 18. The Vigilance Control Device (VCD/Alerter) reset is possible from Active Cab only. 17.CREW MESSAGES LIST MESSAGE MESSAGE CODE TEXT 93 FILTER BLOWER MOTOR CIRCUIT BREAKER IS NOT CLOSED 1672 FUEL PUMP CIRCUIT BREAKER IS NOT CLOSED 1673 NO START FUEL PUMP IS NOT RUNNING -CHECK FP RELAY AND CB 296 FUEL PUMP IS NOT RUNNING -CHECK FP RELAY AND CB 963 NO AUX. GEN. OUT PUT - CHECK AUX. GEN. FLD CIRCUIT BREAKER 637 NO LOAD-NO CA OUTPUT CHECK AUX. GEN. FLD CIRCUIT BREAKER 2352 NO LOAD AUX.GEN.FLD BREAKER TRIPPED MANUAL RESET REQUIRED 1022 NO LOAD - AC CONTROL CIRCUIT BRREAKER IS NOT CLOSED 792 LOCAL CONT. CIRCUIT BREAKER IS NOT CLOSED / BATT. KNIFE SWITCH 223 IS OPEN 795 NO START - CONT. CIRCUIT BREAKER OR CONT & FP SWITCH DOWN 230 NO LOAD - CONT. CIRCUIT BREAKER IS NOT CLOSED 2354 TURBO LUBE PUMP CIRCUIT BREAKER IS NOT CLOSED NO LUBRICATION ALLOWED - TURBO LUBE PUMP CB IS NOT CLOSED 2420 AIR BRAKE CIRCUIT BREAKER IS NOT CLOSED 5001 FILTER VACUME SWICH TRIPPED - ENGINE AIR FILTERS MAY BE DIRTY 14 ENGINE FILTERS ARE DIRTY CHANGE OUT REQUIRED - POWER MAY BE LIMIT TO THROTTLE 6 97 FVS/EFS SWITCH AND / OR WIRING FAILURE
IRCAMTECH/M/GWL/Dual cab 69 66 ENGINE DEAD LOCOMOTIVE IS NOT ISOLATED 135 NO START - LOCOMOTIVE IS NOT ISOLATED 136 FORCED MINIMUM ENGINE SPEED - LOCOMOTIVE IS ISOLATED 915 LOW ENGINE WATER LEVEL DETECTED 1227 ENGINE WILL NOT START - LOW ENGINE WATER LEVEL DETECTED 203 CONTROL / FUEL PUMP SWITCH IS DOWN 2329 CONTROL / FUEL PUMP SWITCH IS DOWN - ENGINE WILL SHUTDOWN WITH IN 10 MINUTES 149 TRAINLINE ALARM BELL 2493 ALERTER OR VIGILANCE SYSTEM HAS MADE A PENALITY BRAKE APPLICATION 1070 NO LOCAL SANDING - SPEED TOO HIGH, TRAIN LINE LOCOMOTIVE MAY BE SANDING 2324 NO PRE-LUBRICATION ALLOWED ENGINE IS RUNNING 1081 NO ENGINE START - TURBO PUMP NOT RUNNING, RUN PUMP FOR 15 MINUTES 1833 1056 ENGINE PRE-LUBRICATION FAILURE ENGINE CAN BE STARTED 3077 ENGINE SHUTDOWN - ENGINE OVER SPEED CONDITION REDUCED LOAD - TURBO OVER SPEED 67 EMERGENCY FUEL CUTOFF ACTIVATED 587 MU ENGINE STOP REQUESTED 994 ENGINE SHUTDOW - LOW ENGINE OIL PRESSURE 1080 NO START - START FUSE IS OPEN OR MISSING 96 FORCED MINIMUM ENGINE SPEED - ENG. RUN SWITCH IS DOWN 176 NO LOAD - GEN. FIELD SWITCH IS DOWN OR SDR RELAY IS PICKED UP 727 REDUCED LOAD - ENGINE SPEED FAULURE 228 NO LOAD - SIMULTANEOUS FORWARD AND REQUEST 130 NO LOAD - SIMULTANEOUS POWER AND DY. BRAKE REQUEST 1031 IMPROPER TRAINLINE THROTTLE IN DY. BRAKE 806F PGND MG SENSOR OPEN OR FAULTY 8071 PGND PHASE IMBALANCE POSITIVE SIDE SENSOR OPEN OR FAULTY 1067 ENGINE SHUTDOW - LOW ENGINE WATER LEVEL 1104 ENGINE SPEED INCREASE - HIGH AUX. GEN. LOAD 8075 PGND PHASE IMBALANCE NEGATIVE SIDE SENSOR OPEN OR FAULTY
IRCAMTECH/M/GWL/Dual cab 70 3320 COLD ENGINE - THROTTLE 2 LIMIT 53 HOT ENGINE - THROTTLE 6 LIMIT 319 NO LOAD - HOT ENGINE THROTTLE 6 LIMIT EXTENDED TIME 83 BOTH ENGINE TEMPERATURE PROBES ARE FAILURE 938 ENGINE SPEED INCREASE - LOW WATER TEMPERATURE AEB APPLIED PENALITY BRAKE MOVE THROTTLE TO IDLE AND PRESS 5037 AEBRST SWITCH TO RELEASE BRAKES 5038 PENALITY APPLIED BY MU LOCO MOTORING PROHIBITED 5039 INVALID NOTCH POWER GROUND FAULT MOVE THROTTLE TO IDLE AND KEEP 61 REVERSER IN CENTER NO DB, NO LOAD TEST POWER GROUND FAULT LOCKOUT 59 POWER GROUND FAULT 5040 NO LOAD POWER GROUND FAULT LOCKOUT 5042 GROUND FAULT MAIN GEN. POSITIVE HALF SIDE PHASE IMBALANCE 5043 NO LOAD -MG POSITIVE HALF SIDE PHASE IMBALANCE LOCKOUT 5044 GROUND FAULT MAIN GEN. NEGATIVE HALF SIDE PHASE IMBALANCE 5045 5046 NO LOAD -MG NEGATIVE HALF SIDE PHASE IMBALANCE LOCKOUT 77 ENGINE SPEED INCREASE FOR AIR COMPRESSOR OPERATION MRPT FAULURE FORCED AIR COMPRESSOR LOADING 1069 NO LOAD LOCO OVER SPEED BRING THROTTLE TO IDLE 2495 EPU SENSOR FAULTY FP RELAY FAILED TO PICK UP 88 FP RELAY FAILED TO DROP OUT 221 GFD FAILED TO DROP OUT 352 GFC FAILED TO DROP OUT 1961 GFD FAILED TO PICK UP 1963 GFC FAILED TO PICK UP 1960 B1 FAILED TO PICK UP 1962 B2 FAILED TO PICK UP 2060 B3 FAILED TO PICK UP 2062 B4 FAILED TO PICK UP 2051 NO START - STARTER MOTOR ABUTMENT CONDITION 2049 NO LOAD NO DB POWER GROUND PROTECTION DISABLED 226 UNABLE TO BUILD DCLV 600 VOLTS 5074 5075
IRCAMTECH/M/GWL/Dual cab 71 80B0 NO DB AND LOAD TEST GRID CURRENT IMBALANCE 80B1 REDUCED DB, NO LOAD TEST GRID OVER CURRENT 80B2 80B3 NO DB AND LOAD TEST GRID OVER CURRENT 80B4 NO DB AND LOAD TEST GRID OVER CURRENT LOCKOUT 80B5 REDUCED DB AND NO LOAD TEST - RESISTANCE OF GRID PATH-1 IS TOO HIGH 80B6 REDUCED DB AND NO LOAD TEST - RESISTANCE OF GRID PATH-2 IS TOO 80B7 HIGH B0C4 REDUCED DB AND NO LOAD TEST - RESISTANCE OF GRID PATH-1 IS TOO 80C6 LOW 2984 REDUCED DB AND NO LOAD TEST - RESISTANCE OF GRID PATH-2 IS TOO 2975 LOW 2977 NO LOAD - BOTH DCLV SENSORS FAULTY DCLV CROSSED MAX LIMIT BRING THROTTLE TO IDLE AND KEEP REVERSER IN CENTER LOSS OF TRAINLINE PRESSURE - PLACE AUTO BRAKE HANDLE IN EMERGENCY FOR 60 SECONDS AIR BRAKE FAILURE - USE LOCOMOTIVE IN TRAIL ONLY LOW MAIN RESERVOIR PRESSURE - USE LOCOMOTIVE IN TRAIL ONLY 2983 AIR BRAKE POWER INTERRUPTION PENALTY - PLACE AUTO HANDLE IN FULL SERVICE FOR 10 SECONDS 2986 AIR BRAKE PENALITY - PLACE AUTO HANDLE IN FULL SERVICE FOR 10 2987 SECONDS 0 TO RESTORE NORMAL AIR BRAKE OPERATION PLACE AUTOMATIC 810F HANDLE IN RUNNING 76 COMMUNICATION FAILURE BETWEEN LCC AND CCB 15 16 COMMUNICATION FAILURE BETWEEN LCC AND DPC 17 ENGINE SPEED INCREASE - TURBO COOLDOWN CYCLE 18 #1 LOCKED WHEEL / SPEED SENSOR FAULT - STOP TRAIN AND VERIFY AXLE ROTATE 19 #2 LOCKED WHEEL / SPEED SENSOR FAULT - STOP TRAIN AND VERIFY AXLE ROTATE #3 LOCKED WHEEL / SPEED SENSOR FAULT -STOP TRAIN AND VERIFY AXLE ROTATE #4 LOCKED WHEEL / SPEED SENSOR FAULT - STOP TRAIN AND VERIFY AXLE ROTATE #5 LOCKED WHEEL / SPEED SENSOR FAULT - STOP TRAIN AND VERIFY AXLE ROTATE
IRCAMTECH/M/GWL/Dual cab 72 20 #6 LOCKED WHEEL / SPEED SENSOR FAULT - STOP TRAIN AND VERIFY AXLE ROTATE 5122 GENERATOR FIELD CIRCUIT BREAKER OPEN OR TRIPPED 5127 ENGINE SPEED INCREASE EXCITATION CONTROL 5128 HOT ENGINE SOFT DERATED POWER LIMIT TO THROTTLE 6 6860 MCC FIRED BRAKE CHOPPER 6864 BRAKE CHOPPER POWER SUPPLY FAILED OR OFC DISCONNECTED 5132 HARD CROWBAR FIRED BY MCC BRING THROTTLE TO IDLE 814D 5133 PLEASE SHUTDOWN AND RE START THE ENGINE TO POWER UP MOTORS, DUE TO CROWBAR FIRED HARD CROWBAR POWER SUPPLY FAILED OR OFC DISCONNECTED 818B MICRO AIR BRAKE CB NOT CLOSED IN CAB-1 818C MICRO AIR BRAKE CB NOT CLOSED IN CAB-2 818D BL KEY REMOVED IN BOTH CABS 818E BL KEY INSERTED IN BOTH CABS 818F CAB-1 IS ACTIVE 8190 CAB-2 IS ACTIVE 8191 GF CB SHOULD BE OPEN IN CAB-1 8192 GF CB SHOULD BE OPEN IN CAB-2 8193 GF CB NOT CLOSED IN CAB-1 8194 GF CB NOT CLOSED IN CAB-2 819D ENGINE SHUTDOWN DUE TO MECHANICAL OVER SPEED RESET OSTA BEFORE START THE ENGINE 819E ENGINE SHUTDOWN UNEXPECTEDLY 81A3 WRONG ENGINE RPM CHECK GOVERNOR PLUG 81A1 POWER GROUND CONNECTOR OPEN
IRCAMTECH/M/GWL/Dual cab 73 18. Some Important Crew Messages Micro Air Brake CB Related Crew Messages MAB CB CAB1 MAB CB CAB2 System Action Observation ON/OFF OFF Crew Message: MAB CB OFF in CAB2 OFF ON Crew Message: MAB CB OFF in CAB1 ON ON Normal Working. Generator Field Circuit Breaker Related Crew Messages GF CB Fault Messages These CB's related Fault messages are linked with Active Cab BL key. If GF CB is tripped in Cab-1 MCC logs a Fault: Gen. Fld. CB tripped under load in Cab-1. If GF CB is tripped in Cab-2 MCC logs a Fault: Gen. Fld. CB tripped under load in Cab-2. BL Key and GF CB related Crew Messages BL Key1 BL Key2 GFCB GFCB System Action CAB1 CAB2 OFF OFF ON/OFF ON/OFF Brake Contactors ON, GF ON OFF OFF.Crew Message: BL Key Removed In Both CABs ON OFF Normal Working from CAB1 Crew Message: CAB1 is Active
IRCAMTECH/M/GWL/Dual cab 74 ON OFF OFF OFF GF OFF. ON OFF Crew Message: CAB1 is OFF ON Active OFF ON OFF ON Crew Message: GFCB ON ON Open in CAB1 ON/OFF ON GF OFF. Crew Message: CAB1 is ON ON/OFF Active OFF ON Crew Message: GFCB should be OFF in CAB2 GF OFF Crew Message: CAB2 is Active Crew Message: GFCB should be OFF in CAB1 Normal Working from CAB2 Crew Message: CAB2 is Active OFF OFF GF OFF ON/OFF ON/OFF Crew Message: CAB2 is Active Crew Message: GFCB Open in CAB2 Brake Contact ors ON. Crew Message: BL Key Inserted In Both CABs
IRCAMTECH/M/GWL/Dual cab 75 19. General Safety Precautions Dual Cab Locomotive Safety Precautions: Dual Cab locomotive has AC Electrical transmission system and therefore includes special equipment which is not found on locomotive having usual DC/DC or AC/DC transmissions. For safety sake, it is necessary to follow certain extra precautions before inspecting the equipment or operating the locomotive. Locomotive pilots should not access any device within ECC#1 due to high voltage. Access within ECC#1 is limited to maintenance staff of the WDG4 / WDP4B / WDP4D locomotives. High voltage capacitors are located in each traction converter to filter main generator voltage. These capacitors operate at DC Link voltage from 600V to 3400V DC. When locomotive is shutdown, these capacitors could retain high voltage causing severe injury or death to the operating and maintenance staff. A procedure has been developed to discharge this high voltage into Dynamic Brake Grids or by other means to prevent the possibility of injury. They are: Before shutting down the locomotive, keep RUN/ ISOLATE switch in ISOLATE position in both cabs and then shutdown the locomotive. All 'BRAKING CONTACTORS' pick up and discharge the DC LINK capacitors through grid resistors in one second. After 20 seconds all DC LINK Isolation switches will be driven to shorting position. Automatic Discharge DCL voltage is discharged automatically, when loco pilot takes manual action to shutdown the locomotive. There are three general ways to discharge the DC LINK capacitors and other components prior to servicing and 4th method is to maintain the short. i. REVERSER IN CENTER POSITION (Through Bleeder Resistors):
IRCAMTECH/M/GWL/Dual cab 76 Each Traction Inverter has Bleeder resistors (400 KΩ/200 W) across the DC link. When locomotive operator moves the reverser from forward or reverse to centered, main generator excitation stops. If no further action is taken, Bleeder resistors discharges the DC link < 90 volts in approximately 50 minutes. Although very reliable, the bleeder resistors do not guarantee the discharge since the resistor could be interrupted internally or the external connection to the capacitors. ii. ISOLATION SWITCH IN ISOLATE (Through Dynamic Brake grids): The normal way to discharge the DC LINK capacitors is through two Dynamic Brake grids which are connected in parallel. When locomotive operator turns Isolation switch in any cab from RUN to ISOLATE (or the LCC loses RUN digital Input signal), the parallel brake grid path is connected to DC LINK by four Braking contactors (B1, B2, B3, B4). This method discharges the DC LINK capacitors in less than ONE second. Note : If the Braking Grids are shorted or grounded, or any one grid path open circuited, the grids would still discharge the DC LINK. Only if both grid paths are Failed, the DC link does not discharge by this method. iii. BRAKE CHOPPER AND HARD CROW BAR: Whenever the DCLV ≥ 2800V, Brake Chopper fires to bring the DCLV to ≤2600V, if the DCLV ≥ 3000V Locomotive Control Computer cuts off excitation, TCC stops the operation of inverters, and when DCLV≥ 3400V MCC fires Hard Crowbar and at DCLV ≥ 3600V, Hardware fires Hard Crowbar. DC Link voltage discharges in the Crowbar resistor. In case of crow bar fire, engine shuts down automatically and re-crank for normal operation.
IRCAMTECH/M/GWL/Dual cab 77 iv. After the DC link has been discharged by braking grids or the brake chopper or crow bar, the DC link contactors moves to the open position. Moving all DC link switch gears to the open position causes all Traction Inverters to be shorted and grounded. When the engine is shutdown (regardless of the Isolation switch position), the control computer picks up all the Braking contactors, the DC link voltage dissipate through grid resistors. Once the DC link capacitors are discharged, DCL contactor moves to open position.
IRCAMTECH/M/GWL/Dual cab 78 20. DOs AND DO NOTs S.No. Dos DONTs 1 Always keep Gen. Field Circuit Do not keep Gen. Field Circuit Breaker in OFF position in \"Inactive Breaker in ON position in \"Inactive Cab\". Cab\". 2 Always keep lights Circuit Breaker Do not keep lights Circuit Breaker in ON position on ECC#1 CB panel, in OFF position on ECC#1 CB if you are working from any Cab. panel, even you are working from Since Flasher lights & Classification Cab-2. Flasher lights & lights are connected from Cab-1 Classification Lights do not work lights Circuit Breaker. from Cab-2 lights Circuit Breaker. 3 Keep Computer control CB and Do not keep Computer control CB Micro Air Brake CB in ON position and Micro Air Brake CB in OFF at both Cabs for normal working position in the \"Inactive Cab\". from any Active Cab. Since these Cabs CB's are connected in series and both cabs must be in ON position to work from any Cab. 4 Insert and turn ON the BL Key in Do not insert and turn ON BL key 'Active Cab' only. in \"Inactive Cab\". 5 Keep Run/Isolate switch in RUN Do not keep Run/Isolate switch in position at both Cabs for normal ISOLATE position in \"Inactive working. Cab\". It must be in Run position in both Cab for normal working. 6 Keep MU Eng. Stop in Run Do not keep MU Eng. Stop in Stop position (green portion inside) at position in any cabin while both Cabs before Cranking the cranking the engine. To shutdown Engine. Since both Cabs MU Eng. the engine, user can shutdown Stop buttons are connected in from any Cab. parallel. 7 Keep LEAD/TRAIL switch in Do not keep LEAD/TRAIL LEAD position in \"Active Cab\" switch in LEAD position in control console. \"Inactive Cab\" control console. 8 Keep always TELM and RAPB Do not keep TELM and RAPB toggle switches in normal position in toggle switches in ENABLE both Cabs unless and until position in any Cab unless and required. until required.
IRCAMTECH/M/GWL/Dual cab 79 9 Make a habit to check the TM Do not start locomotive without CUTOUT status on TFT Display ensuring the TM CUTOUT status Unit, while taking over charge. on TFT display unit as per previous Driver Log Book entry. 10 Put OFF the ENG.RUN and GEN. Do not put ON the ENG. RUN Field switches in Inactive Cab. and GEN. Field switches in Inactive Cab. 11 Apply loco brakes through Do not release loco brakes while Independent Brake Handle and loco is stabled condition to avoid ensure Brake Cylinder Pressure Alerter penalty brake application. >1.8kg/cm2 to avoid Alerter Penalty Brake application while the train is stabled condition. 12 While cranking locomotive from While Cranking the Locomotive any cab, keep Run/Isolate switch in Do not keep Run/Isolate switches isolate position at least in one Cab. in Run position at both Cabs. 13 When the engine speed increases Do not Notch up beyond 5th for for Compressor operation, Ensure MR pressure build up without no air leakages on Engine and load. Automatically Engine speed Formation. increase to TH4 when MR pressure drops < 8 kg/ cm2. 14 Press Alerter Reset button when Do not Disable the Alerter system the Alerter light flashes or Audio unless and until the system is bell sounds to avoid penalty Brake malfunctioning. Do not Try to reset application from Active Cab only. the Alerter / VCD from \"Inactive Cab\", Alerter/VCD does not reset from \"Inactive Cab\". 15 While re-cycling Computer Control Do not re-cycle Computer Control Circuit Breaker, keep Reverser Circuit Breaker When the Handle center, TH Idle, Isolation Reverser in a Direction, Isolation switch in isolate position in \"Active switch in Run position and TH in Cab\". Notch 1-8 or DB mode.
OUR OBJECTIVE To upgrade maintenance technologies and methodologies and achieve improvement in productivity and performance of all Railway assets and man power which inter-alia would cover reliability, availability, utilization and efficiency? If you have any suggestions and any specific comments, please write to us. Contact person : Director (Mech.) Postal address : Indian Railways, Phone : Centre for Advanced Fax : Maintenance Technology, Maharajpur, Gwalior. Pin code - 474 0050 0751- 470890, 0751-2470803 0751- 2470841
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