Traction Rolling Stock - Indian Railways Institute of Electrical ...

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to eliminate the possibility of fires due to short circuits/overloads etc. Always ensure that the proper sizes and types fuses are used for replacement. Check calibration of MCBs and fuses of only approved suppliers as laid down by RDSO. 9.2.5 Ensure that all the protective relays are in good working order and are properly calibrated. 9.2.6 A loose connection is a potential source of fire. Proper tightness of all the connections is, therefore, to be ensured and this point is to be given particular attention during inspections. Locos commissioned after POH or new locos after commissioning should be thoroughly checked up for loose connection, as during the first few days, loose connections will show up. Ensure that the connections secured with a nut and bolts are provided with a set of plain and spring washers. 9.2.7 Insulation failures can result from surface flash over due to presence of dirt and dust. It is, therefore, essential that proper cleaning of terminal connections, bus bars, insulations and equipment is done during schedules as laid down to remove oil and dust. 9.2.8 Fires in control equipment cubicles are a problem and usually lead to considerable damage. Segregation of phases in TK panel, provision of insulating separators between the phases, use of Epoxy or Nylon cleats should be done. 9.2.9 Batteries constitute some fire or explosion risk when they are being given a heavy charge. Heavy charging can be higher due to malfunction of the charging equipment or carelessness when charging from the shop floor rectifier. It is therefore important to check that the ventilation provided in the battery box is not choked. 9.2.10 Use only elastomeric cable as per RDSO specification No.E-14/01 Part I and II revision1of 1992 should be used. Cleats used should not have sharp corners. Power, auxiliary and control cables should be separately laid down to prevent the chances of short circuit of cables of different voltage grade. 9.2.11 In order to monitor healthy condition of insulation of wiring and equipment, insulation resistance should be measured periodically in sheds and during POH in shops, and records kept. 9.2.12 In the event of fire it is essential that the main circuit breaker is tripped and the battery fuses of locomotives and EMUs are immediately removed to eliminate the continued feeding of the fault by the battery. 9.3 TECHNICAL INVESTIGATION INTO FIRES Every case of fire minor or major, irrespective of the location, whether in power, auxiliary or control circuits, should be investigated very carefully, every though an inquiry in accordance with the Accident Rules may not be called for. The cause as established by the investigation should be analyzed by the Sr.DEE/DEE personally to identify areas requiring further investigation and to tighten up preventive measures. A report on each case of fire should also be furnished to CEE. The general guidelines to check up the items in locomotive in the event of fire, is given below: 9.3.1 Items to be cheeked up after the fire in a Locomotive: Position of master controller SMGR drum and tap position of tap changer. Condition of DJ, whether locked or open Whether relays particularly QLM, QRSI, QOP, QOA are in tripped condition or normal.
Condition of HOBA, HQOP and HQOA switches. Condition of fuses. Condition of CGR1, CGR2, CGR3 and RGR. Arc-chute of CGRs, line and shunting contactors, auxiliary circuit contactors. Condition of contactors-whether found in wedged or welded. Signs of overheating and loose connections at the terminal points. Identify the location of the cable where globules are found formed. Identify the area/zone where the damage to the locomotive is extensive due to fire. Condition of 25kV bushings of the transformer-whether burnt after bursting or simply burnt or not damaged. Possibility of transformer oil splashing with special attention to any sign of oil in conservator. taps. Condition of tap changer with particular attention to splashing of oil and flash-over of the Condition of other electrical equipment like rectifier block, inductive shunt, auxiliary machines and traction motors for any abnormality. Polarity of smoothing reactor, if not damaged fully. Condition of brake blocks, wheel disc for over-heating and melting of brake blocks. Search out molten pieces of brake blocks, if any on SL. Whether the fire took place when dynamic brake was in applied condition. If so, whether thermal relay of DBR was in working order. Examine the condition of DBR resistances. Presence of any inflammable material like jute, rubber etc. Abnormality, if any already indicated in the log book by the driver which can lead to fire. Take this statement of crew and other personnel traveling on the locomotive about how the fire originated. Whether specified fire extinguishers were available in the locomotive and used by the driver and how many of them were found effective. 9.4 FIRE ACCIDENTS Fires in trains, whether carrying passengers or not, resulting in loss of human life or injury to any person or loss of or damage to railway property to the extent of or more than the value prescribed are required to be treated as accidents and have to be inquired into in accordance with the Rules for reporting and inquiring into accidents Fires in other railway premises resulting in damage to railway property to the extent of or more than the value prescribed are required to be treated as accidents. Fire accidents involving loss of human life or injury to persons or damage to railway property estimated to cost equal to or over a prescribed value have also to be reported as soon as possible on telephone to the Railway board by the General Manager through operating (safety ) Branch. When electrical installations or electric rolling stock are involved or when there is possibility that the fire was caused by electrical short circuit or due to defect or malfunctioning of electrical equipment, a reprehensive of the Electrical department should
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PREFACE The book on "Traction Rolli
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A.C. LOCO EQUIPMENTS 1.1: ROOF EQUI
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Fig.1.1.3
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Leg I A I = 704 cm 2 (Regulating tr
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Voltage Primary output : Primary ma
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y the main shaft through gear arran
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Base load … 500 ohms,300W (12nos.
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1.4.6 Over-voltage Over -voltage in
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2.3 BOGIE COMPONENTS Bogie of a loc
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Fig. 2.5. Primary and secondary sus
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2.8 BOGIE OF WAG/7 This is a 3 axle
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Fig. 1. Single Reduction Gear Drive
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FIG.3.6 ROTOR HOLLOW SHAFT DRIVE
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5. POWER CONTROL AND AUXILIARY CIRC
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Permanent field weakening resistanc
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5.4.1 Arno converter (CVAR) The sin
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pantographs 1 and 2 are lowered. Po
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the tap changer comes to a standsti
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d) The tap changer GR must be at po
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5.7.3.1 Control of transformer tap
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VE2. The limit contacts of 61-62 fo
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With multiple unit operation the ma
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elay Q48. If the wheels on one bogi
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5.9.1.4 Lamp LSGR (Green) Tap chang
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cabs are controlled by means of the
Page 73 and 74: 6. AIR COMPRESSOR 6.0 INTRODUCTION
Page 75 and 76: 6.3 COMPRESSOR DETAILS Model : TRC
Page 77 and 78: 1) Type & Make : 1) Northey Type 25
Page 79 and 80: one shaft to the other, and maintai
Page 81 and 82: 7. BRAKE SYSTEM OF ELECTRIC LOCOMOT
Page 83 and 84: y the driver’s vacuum brake valve
Page 87 and 88: 7.2 DUAL BRAKE SYSTEM ON ELECTRIC L
Page 89 and 90: is run to maintain vacuum in the sy
Page 91 and 92: 1. MR equalising pipe 2. BC equalis
Page 97 and 98: 7.2.11 Gauges There are five gauges
Page 99 and 100: akes. e) When Driver makes an emerg
Page 101 and 102: train. Failure of the orange lamps
Page 104 and 105: 8. MAINTENANCE, AND OVERHAUL SCHEDU
Page 106 and 107: e made to increase the interval bet
Page 108 and 109: 8.5.2.6 Battery: Check and record b
Page 110 and 111: cab 1 a) Raising of pantograph. b)
Page 112 and 113: d) Check containers of batteries fo
Page 114 and 115: Section E4 Carry out following: a)
Page 116 and 117: f) Inspect all resistance, includin
Page 118 and 119: ) Check capacitor of headlight stab
Page 120 and 121: 8.11.4.12 Speedometers- Calibration
Page 122 and 123: 8.15.3 One copy of the certificate
Page 126 and 127: invariably be a member of the inqui
Page 128 and 129: Two capacitors of 0.05 microfarads
Page 130 and 131: Notch 18 T3 and T8 closed, connecti
Page 132 and 133: These machines are capacitor start
Page 134: The main lighting circuits are fed
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