C & W - SILENT FEATURE OF EMERGENCY BRAKING DISTANCE

 

EMERGENCY BRAKING DISTANCE (RAILWAY BOARD’S LETTER NO. 2001/M (L)/466/63 DATED 11-02-2004) The emergency braking distances for following train combinations with air and vacuum brake and wagons hauled by diesel locomotive at different speeds and on level sections have been estimated values are as under.  EBD of coaching stock hauled by single locomotives:- No. of Coaches      EBD in meter at varying speed KMPH  50  60  70  80 90  100  110 16 Air Brake coaches 180 260 358 487 642 815 1019 18 Air Brake coaches 183 263 362 489 645 819 1024 20 Air Brake coaches 189 271 363 497 655 829 1043 16 Vacuum Brake coaches 240 332 452 590 761 971 1196 18 Vacuum Brake coaches 243 344 457 604 784 980 1216 20 Vacuum Brake Coaches 252 357 471 619 801 1004 1227 At 110 KMPH, WDM2 to be used in double headed or MU consist. EBD of coaching stock hauled by single WDM2c/ WdP2 locomotive.          No. of Coaches   EBD in meters at varying speed  KMPH 50 60 70 80 90 100 110 16 Air Brake coaches 180 260 358 487 642 815 1019 18 Air Brake coaches 183 263 362 489 645 819 1023 20 Air brake coaches 189 271 363 497 655 829 1043 16 Vacuum Brake coaches 240 332 452 590 761 971 1196 18 Vacuum coaches 243 344 457 604 784 980 1216 20 Vacuum Brake coaches 252 357 471 619 801 1004 1227 For 22 and more coaches used multiple loco. EBD of freight stock hauled by single WDM2 Locomotive.  No. of wagons   EBD in meters at varying speed KMPH   50 60 70 75 58 BOXN wagons loaded 470 669 897 1025 45 BOX wagons loaded 744 1027 1341 1521 WDM2 be used in double headed or MU consist. EBD of Freight stock hauled by single WDG2 locomotive:- No. of Wagons EBD in meters at varying speed KMPH  50  60  70  75 58 BOXN wagons loaded  469 668  896  1025 45 BOX wagons loaded  743 1012  1337  1501 WDG2 be used in double headed or MU consist. This value is based on certain theoretical assumptions; hence these may be taken as guidelines only.

C & W - SILENT FEATURE OF BRAKE POWER CERTIFICATE (BPC)

BRAKE POWER CERTFICATE:-   BPC is issued after intensive examination of train in empty   condition. ·         No sick wagon is allowed to run. ·         Prepare in triplicate. ·         Indicates brake power percentage of the train. ·         BPC will be invalid if, (a)  The destination of the train is not mentioned on BPC. (b)  The train composition of train is changed by 10 four wheeler unit or more. (c)  The train is stable more than 24 hours at train examination points.

C & W - SILENT FEATURE OF BRAKE POWER CERTIFICATE (BPC)

BRAKE POWER CERTFICATE:-   BPC is issued after intensive examination of train in empty   condition. ·         No sick wagon is allowed to run. ·         Prepare in triplicate. ·         Indicates brake power percentage of the train. ·         BPC will be invalid if, (a)  The destination of the train is not mentioned on BPC. (b)  The train composition of train is changed by 10 four wheeler unit or more. (c)  The train is stable more than 24 hours at train examination points. (d)  The integrity is changed of CC rake more than four, 8 wheeled wagon. Type of Train Color Brake Power Percentage Validity Originating Station Intermediate Station 1.        Ordinary   Stock (a)  Plain Bearing stock (b)  Vacuum Brake Stock UIC Stock/ CRC (c)  Air Brake Stock Pink Pink Green 85% 85%  90% 75% 75% 75% 800 Kms. End-To-End /Destination (Unloading) Station (i)          4 Days in empty condition to reach loading station End-To-End/ Destination (Unloading) station 2. Close Circuit (C.C.) Rakes Blue 100% 75% 7500 kms / 35 days. In case the km. entries are incomplete 3.Premium rake X 95% 75% 12 days in empty condition& 3 days grace period in loaded condition 4. Coaching Stock     x 100% 90% 3500 Kms / 4 days Round pattern BPC AIR PRESSURE CONTINUITY TEST:- OBJECTIVE:-       1-Continuity of brake pipe pressure from engine to brake van/ last vehicle. 2-On reduction of brake pipe pressure by driver, train brake must apply. 3-In emergency condition, if guard destroys BP pressure, then also train brake should be applied. WHERE TO PERFORM:- 1-    When an engine is attached ahead or behind the train engine. 2-    When an engine is attached behind the last vehicle of the train. 3-    When traction or engine is changed. 4-    When shunting is performed in a train. 5-    Whenever air pressure leakage/brake power work is attended on a train. 6-    When a stable load has to be cleared from a road side station. PROCEDURE:- 1. Charge the train with air pressure and ensure the requisite amount                 In Engine                         In Brake Van           BP- 5.0                                   4.8 Kg/cm211- Maintenance is less.           FP- 6.0                                    5.8 Kg/cm2 2. Guard will destroy the BP pressure by 1 Kg/cm2 with the help emergency handle of brake van or angle cock of last vehicle. 3. Driver will ensure that BP pressure drops in engine also. He will observe Air flow indicator, light and buzzer. 4. Guard will place the emergency handle in normal position and will allow   the BP pressure to charge again. 5. Driver and Guard will ensure that requisite amount of BP pressure            is charged again in engine as well as in brake van. 6. Driver will destroy the BP pressure to zero with the help of driver’s brake valve. 7. Guard will ensure the Bp pressure in brake van /last vehicle has also   dropped to zero. 8. To ensure brake application on train, Assistant Driver and Guard will check 3 or 4 wagons/ vehicles from their respective ends. 9. Driver will charge again Bp pressure by keeping the Driver’s brake valve in release position. 10. Driver and Guard will ensure that BP pressure both in engine and brake van / last vehicle is charged again to prescribed amount slowly and at Uniform rate.