OHE Maintenance Depots Guidelines PDF

GUIDELINES FOR PROVISION OF MAINTENANCE DEPOTS, TOOL AND PLANTS AND TRANSPORT FACILITIES 6.0 OHE Maintenance Depots 6.0.1 In the overall interest of minimum capital and recurring costs with electric traction, the number of OHE maintenance depots need be optimized....

GUIDELINES FOR PROVISION OF MAINTENANCE DEPOTS, TOOL AND PLANTS AND TRANSPORT FACILITIES 6.0 OHE Maintenance Depots 6.0.1 In the overall interest of minimum capital and recurring costs with electric traction, the number of OHE maintenance depots need be optimized. The general conditions that govern the location and the spacing of the OHE maintenance depots are as under:- i. The total equipped track kilometers to be maintained by each depot. ii. Beat of the depot on either side iii. Traffic density obtained on the section and the time factor in reaching the farthest point. iv. The proximity of major yards with considerable equipped track kilometers; v. Availability of educational, medical and other infrastructure facilities in the vicinity. 6.0.2 The total staff required for OHE maintenance for a given section is arrived at, based on the prevalent yard sticks for maintenance and the schedules of maintenance laid down for various equipments. The total staff is distributed amongst the maintenance requirements of OHE under their respective jurisdictions. The staff requirement for the maintenance as per the yardstick is in no way linked with the number of OHE Depots in a particular sections. 6.0.3 The total equipped track kilometers normally assigned for maintenance to a single OHE depot should be at least 150 track kilometers which amounts to 250 to 300 EETKMs (Electrical Equated Track km) to ensure that the installations to be maintained by a single depot do not become unwieldy. On a normal double line section this would work out to a spacing of 60 RKMs between successive OHE maintenance depots. In the case of depots in the vicinity of terminal / major yards (having large wired Tkm)., the spacing would correspondingly get reduced. In view of the concentration of work load in major yards, it will be necessary to locate maintenance depots in or around the vicinity of the major yards. 6.0.4 The beat of the depot on either side should not normally exceed four block sections (occasionally live) so as to ensure quick transportation of staff to the breakdown spot even if it happens at the farthest end of the jurisdiction of the depot. 6.0.5 The location of the depot should be such that reasonable educational and medical facilities are available at the place, as otherwise the staff would be generally reluctant to stay at such a place. 6.0.6 The standard lay-outs of OHE depots have undergone several changes over a period of time, with varied concepts like major depots, minor depots, etc emerging to meet specific requirements. The essential difference between major and minor depot is the provision of a tower wagon with its shed and associated track connections and the OHE Depot Workshop in a major depot. 6.0.7 The standard OHE maintenance depot need only be provided with a drilling machine, bench grinder etc. The standard layout of OHE depot with workshop is shown at Fig. A6.01, the schematic layout of Divisional Repair Shop to be provided as an adjunct to one of the OHE depots is shown at Fig, A6.02 Over Head Equipments Page 130 6.0.8 Secondary activities / facilities in OHE maintenance depots, such as smithy, carpentry, welding etc can be provided at a central plan either at the Divisional Headquarters or at one of the maintenance depots, depending upon convenience of location. Such a facility will have standard workshop equipments, such as lathe, hacksaw cutting machine, welding set, vertical drilling machine etc. Alongwith the above, a store can be provided where large quantities of OHE materials which are required for major breakdowns for the entire section can be stored, relieving the other maintenance depots from the responsibility of storing large quantities of materials which are required only occasionally. This would also increase the utilization of staff such as welders, blacksmiths, carpenters, and incidentally is likely to result in overall savings of the staff in the anciliary categories and equipments. Over Head Equipments Page 131 6.1 PSI Maintenance Depots 6.1.1 Besides the OHE maintenance depots, PSI maintenance depots are provided for maintaining the various power supply equipments installed at traction substations, switching stations, booster transformers stations, auxiliary transformer stations etc. It is advantageous to locate the PSI maintenance depot along with the OHE maintenance depot so as to achieve some economy in requirements of T&P, transport and other infrastructural facilities. 6.1.2 Normally the average spacing between traction sub stations is 60/70 km. On trunk routes with high traffic densities, where operation of 4500 trains is to be catered for, sub-stations are provided at reduced spacing of 40 to 45 km. With PSI depots spaced at 60/70 km, each depot will be called upon to maintain one or two traction sub- station and 5 to 6 switching stations, besides booster transformer and auxiliary transformer installations on the sections. A sketch showing the suggested layout for a PSI maintenance depot is shown at Fig. A6.03 6.1.3 If a Zonal Repair Shop is provided, necessity of transporting the equipments to the PSI depot may not arise. It is desirable and feasible to give all attention that is required for day-to-day maintenance of the equipments at site. For any major attention such as oil circulation of the breakers, auxiliary transformers, booster transformers, interruptors, etc, the equipment can be transported to the nearest traction sub –station, where power supply is available from the 100kVA auxiliary transformer for working of the oil filtration plant. This results in minimum transportation of these equipments. Major repairs, which cannot be done at the sub-station, should be done only at the Zonal Repair Shop. 6.1.4 By combining the OHE and PSI depots, the OHE transport facility can be conveniently utilised for PSI work as well. A common depot will be cheaper with a common compound wall and security arrangements. Better co-ordination and supervision can be obtained between OHE and PSI maintenance staff if both the depots are located together. It is likely to result in faster attention to breakdowns. In addition, it would be desirable to have this combined OHE/PSI maintenance depot at a station where traction sub-station is also located, wherever it is feasible, as PSI maintenance work is more concentrated at a traction sub – station. 6.1.5 Keeping in view the set up outlined above, it should be possible to locate the PSI depots at alternate OHE depots (instead of locating the same at each and every OHE depot). This would enable a minimum complement of PSI staff both supervisory and others at each of the PSI depots. Over Head Equipments Page 132 6.2 Scale of T&P for OHE Depots 6.2.1 The list of T&P items to be procured by R.E, for OHE maintenance given at Annexure A6.01. This annexure also lists the items to be procured by R.E for equipping each of the tower wagons as well as the break down train. 6.2.2 The T&P recommended to be procured by R.E for PSI maintenance is given at Annexure A6.02 6.2.3 In addition, the T&P recommended to be procured by R.E. for Division Repair shop for OHE is given at Annexure A6.03. Likewise, the T & P to be procured by R.E. for Divisional Repair Shop for PSI is given at Annexure A6.04. 6.2.4 The office furniture to be supplied b R.E. for field offices and depots is shown at Annexure A6.05. 6.2.5 Besides the above, it is felt that general user items of T& P can be procured by the Open Line and need not be provided by R.E. A list of such items is given at Annexure A6.06. 6.3 Transport Facilities for Maintenance Including Breakdown Attention 6.3.1 At present each major OHE Depot is provided with one heavy duty motor truck and one 4-wheeler OHE Inspection Car. These transport vehicles are adequate fro attending to breakdowns and for normal day-to-day maintenance. For push trolley inspections of OHE by supervisors and officers, each OHE depot is to be provided with one push trolley. One Jeep with trailer is to be provided for each field officer at Over Head Equipments Page 133  his headquarters. One motor trolley is to be provided for each station where an OHE officer is headquartered. 6.3.2 One wiring-cum breakdown train is to be provided for each Division to meet any major OHE breakdowns which require wiring of OHE. 6.3.3 Transport facilities recommended for TRD maintenance are summarized at Annexure A6.07. 6.3.4 On section with higher traffic density, eight wheeler high speed tower wagons would enable quicker transportation of men and materials to the site. With increased emphasis on quick restoration after accident, quicker attention to OHE breakdown to OHE breakdowns is called for to provide early restoration of OHE power supply. Annexure A6.01 T & P Items to be Procured by R.E. for OHE Maintenance Organization Sl. Description Major Tower Breakdown No. Depot Car Train 1 2 3 4 5 1 Trifor 2.5 Tonne / 1.5 Tonne 2 2 2 Trifor 5 Tonne / 3 Tonne 2 1 3 Pull-lift 3 Tonne 2 1 2 4 Pull-lift 3/4 Tonne 2 2 5 Dropper making Jig and Wire straightener for 5mm 1 dropper wire 6 Dropper making Jig and Wire straightener for 7mm 1 dropper wire 7 Come-along clamps for Catenary suitable for 4 4 4 19/2.108 mm conductor 8 Come-along clamps for contact wire 107mm2. 4 4 4 9 Come-along clamps for Aluminium “SPIDER” 4 4 4 conductor (20 mm2) 10 Come-along clamps for earth wire (19.2/5 mm) 4 2 2 Galvanized steel 11 Rail jumpers with Clamps at both ends 30 6 12 Rail jumpers extension with clamp at one end 30 6 13 Earthing discharge rod complete 10 4 6 14 Aluminium straight ladder (8m) with hook on top 4 1 2 15 Aluminium straight ladder extensible (11m) 4 1 1 16 Drilling Machine (25 mm) Motor Driver (Radial or 1 - - Pillar) 17 Bench Grinder (Double end) Pedestal Motor Driven 1 - - (203mm) disc 18 Portable Welding-cum-cutting Set (Gas) Range - - 1 cutting 1-100 mm. Welding 0.5 to 30 mm (complete with Oxygen and Acetylene Cylinders, Trolley, Helmet etc) 19 Hydraulic Compressor for return conductor splicing - - 1 20 Portable Electric Drill 21.0 mm 1ph, 230 v (For 1 - - Drilling rails for bonding) 21 Honda Welding Generating Set (100/200 A) with 1 - - Over Head Equipments Page 134  all accessories 22 Portable Diesel Generating Set 3 kVA, 240 V, 1 ph 1 1 1 23 Flood light fitting with 500 Watt Lamps 3 4 4 24 First Aid Box 2 1 1 25 Stretcher 1 - 1 26 Fire Buckets 10 ltr. 4 - 6 27 Portable Fire extinguisher (Cap. 10 ltr) Dry 2 2 2 Chemical Powder 28 Portable Fire extinguisher (Cap. 5 ltr) (Foam type) 2 2 2 29 Contact Wire Cutter 36” 1 1 1 30 Dropper Wire cutter 12” 1 1 1 31 ‘D’ Shackles set of one each (1”,3/4”, 5/8”, 1/2”) 6 4 6 32 Single Sleeve Pulley block 3 1/2” x 1/2 Groove 4 4 4 Steel 33 Single Sleeve Pulley block 3 1/2” x 1/2 Groove 6 4 10 Fiber for drawal of Contact Catenary Wire 34 Single Sleeve Pulley block 6”x 1” Groove Steel 4 2 2 35 Contact Wire twist-cum-bender 6” 2 2 2 36 Steel sling with Eye each and 19 mm dia 6 4 6 a. 1 m ling b. 2 m long 6 4 6 c. 3 m long 6 4 6 d. 4 m long 2 1 1 e. 10 m long 2 1 1 37 Slewing Gadget 2 1 1 38 Contact Wire Splicing Jig. 1 - 1 39 Copper Hammer 2 kg 1 - - 40 Micro Meter 1 - - 41 Metric Tape 30m, 15m each 2 1 1 42 Bench Vice 6” 2 - - 43 Loaded Trolleys 4 - - 44 Engineering Ratchet 2 - - 45 Stren covering distance 1 km range 1 - - 46 Tilly lamps - - - TESTING AND MEASURING EQUIPMENTS 1 Megger 2500 V 1 - - 2 Dynamometer (3500 kg x 20 kg) 300 mm dia 1 - - 3 Earth Megger / Tester 1 - - 4 Binoculars 1 - - 5 Vemler Callipers 1 - - 6 Walkie Talkie sets (2 W output) 2 4 2 7 Emergency Telephone 6 1 - 8 Multimeter 1 - - Over Head Equipments Page 135  Annexure A6.02 T & P for PSI Depots to be Supplied by R.E. Organization Sl. Description Quantity No. 1 Trifor 3 Tonne 3 Nos. 2 Trifor 5 Tonne 1 No. 3 Barrel Pump 1 No. 4 ‘D’ Shackles 5/8”, 3/4” 3 sets 5 Steel rope slings 1m, 3m each 2 Nos. 6 Steel rope slings 10m 1 No. 7 Chain pulley block 3.0 ton cap. 1 No. 8 Pulley single sleeve 3.0 ton cap. 2 Nos. 9 First Aid box 1 No. 10 Stretcher 1 No. 11 Fire buckets 4 Nos. 12 Portable electric blower 1 No. 13 Portable electric grinder 1 No. 14 Portable electric drilling machine 13 mm 1 No. 15 Crimping tool upto 6 mm2 size 2 Nos. 16 Aluminium step ladder 8’ height 2 Nos. 17 Aluminium ladder with hook on top 8’ 2 Nos. 18 Aluminium step ladder 16’ 1 No. 19 Mobile aluminium ladder 36’ 1 No. 20 Magic Pole ladder 8’ 2 Nos. 21 Earthing Pole Assembly / Discharge Rod 6 Nos. 22 Drop out fuse pull rod 2 Nos. 23 Portable diesel engine operated welding set 230V 1 No. 24 1/2” square drive socket set containing 19 sockets with 6 attachments 3 Nos. 25 Acidity testing kit 1 No. 26 Mains operated insulation tester 5 kV 1 No. 27 Pocket size clip on long tester 1 No. 0 – 5A / 25A 0 – 150V / 300 / 600V 28 A.C. Voltmeter 0-150 V 1 No. 29 A.C. Voltmeter 0-500 V 1 No. 30 Digital time interval meter 15-1000 seconds 1 No. 31 Insulation tester 2.5kV 2 Nos. 32 Earth Tester 1 No. 33 Megger 500 V 1 No. 34 Oil testing kit 1 No. 35 125 ltr. cap. Oil filtration plant 1 No. 36 Insulation tester 250 V 1 No. 37 Multimeter 2 Nos. 38 Auto transformer 2A capacity 1 No. 39 Load cell tester 1 No. 40 Emergency Telephones 4 Nos. 41 Cycle Pump 1 No. Over Head Equipments Page 136  Annexure A6.03 T & P to be Procured by R.E. for Divisional Repair Shop (OHE) Sl. Description Quantity No. 1 Centre lathe 600 mm centre distance 125 mm height 3 ph, 440 V or 1 1 No. ϕ 230 Volt 2 Motor driven hacksaw cutting machine (to deal 75 mm channel) 1 No. 3 Drilling Machine (25 mm) Motor Driver (Radial or Pillar) 1 No. 4 Bench Grinder (Double end) Pedestal Motor Driven (203mm) disc 1 No. 5 Hand driven blower for smithy 1 No. 6 Hydraulic Compressor for return conductor splicing 1 No. 7 3 ph. Welding plant (400 Amps) 1 No. 8 Portable Welding-cum-cutting Set (Gas) Range cutting 1-100 mm. 1 No. Welding 0.5 to 30 mm (complete with Oxygen and Acetylene Cylinders, Trolley, Helmet etc) 9 First Aid Box 1 No. 10 Fire Buckets 10 ltr. 8 Nos. 11 Portable Fire extinguisher (Cap. 10 ltr) Dry Chemical Powder 2 Nos. 12 Portable Fire extinguisher (Cap. 5 ltr) (Foam type) 2 Nos. 13 Portable Honda Generating set 0.75 kVA, 240V,1ph. 1 No. 14 Stretcher 1 No. 15 Black smith hammer 12 kg. 2 Nos. 16 Black smith hammer 10 kg. 2 Nos. 17 Micro Meter mm 1 No. 18 Metric Tape 30m, 15m each 2 Nos. 19 Bench Vice 6” 2 Nos. v20 Black smith Anvil 2 1 No. 21 Portable Electric Grinder 1 No. Over Head Equipments Page 137  Annexure A6.04 T & P to be Procured by R.E. for Divisional Repair Shop (PSI) Sl. Description Quantity No. 1 Primary injection testing kit (o.500 A) 1 2 Secondary injection testing kit (o.50 A) 1 3 MHO Relay testing kit 1 4 2500 Ltr.cap. mobile oil filtration plant 1 5 250 Ltr.cap. mobile oil filtration plant 1 6 Distilled water plant Cap.50 Ltr. 1 7 5 kV Megger 1 8 2.5 kV Megger 1 9 500 V Megger 2 10 Hydraulic Jack 50 Ton. Cap. 6 11 Auto Transformer 2 Amps. Capacity 1 12 Spray painting machine 1 13 Multi meter 2 14 Portable kit tong tester 0-525A. 0-150-300-600V 2 15 Oil testing kit 1 16 Acidity testing kit 1 17 R-L-C Bridge to measure resistance, inductance and capacitance 1 18 Variable Rheostat-1000 Ohms, 1 Amp 1 19 250 Volts Megger 2 20 A/c Voltmeter 0-150 Volts 1 21 A/c Voltmeter 0-500 Volts 1 Over Head Equipments Page 138  Annexure A6.05 Furniture to be Supplied by R.E. for OHE and PSI Sl. Description AEE OHE PSI RC No. 1 Chairs and hands 1 4 3 3 2 Chairs without hands 3 6 4 4 3 Supervisor Table - 3 2 2 4 Ministerial staff tables 3 1 1 1 5 Steel Almirah 3 3 2 3 6 File racks 2 2 2 2 7 Stools 4 6 4 3 8 18 Pigeon holes lockers - 4 3 2 9 Steel trays 4 8 6 6 10 Telephone tables 2 2 1 1 11 Waste paper boxes 4 4 3 3 12 Officers tables 1 - - - 13 Drawing Cabinets 1 - - - 14 Steel book case 1 - - - Over Head Equipments Page 139  Annexure A6.06 T & P Items to be Procured by Maintenance Organization for OHE/PSI Sl. Description Major Tower Breakdown PSI No. Depot Car.D Train 1 Bond Press 3 - 1 - 2 Dekinker 3 1 2 - 3 Swivel Clip Openers 2 2 2 - 4 Portable hand drill 12.5 mm 1 - - - 5 Portable hand drill 8 mm 2 - - 2 6 Portable hand tap 8 mm 2 - - 2 7 DE Spanners sizes (6/7 to 2 7/30mm) 4 1 1 2 complete set 8 DE Spanner 30-32 10 2 2 2 9 DE Spanner 24-26 10 2 2 2 10 DE Spanner 21-23 6 2 - 2 11 DE Spanner 18-19 - - - 4 12 DE Spanner 16-17 6 2 2 - 13 DE Spanner 14-15 6 2 2 - 14 DE Spanner 12-13 - - - 6 15 Ring Spanners set (6/7 to 27/30 mm) 2 1 1 2 16 Ring Spanners 30-32 10 2 2 2 17 Ring Spanners 24-26 10 2 2 2 18 Ring Spanners 20-22 6 - - 2 19 Ring Spanners 18-19 - - - 2 20 Ring Spanners 16-17 6 2 2 - 21 Ring Spanners 14-15 6 2 2 - 22 Ring Spanners 12-13 - - - 6 23 Screw Driver 18” 4 1 1 - 24 Screw Driver 16” 4 1 1 1 25 Screw Driver 12” 4 1 1 - 26 Screw Driver 8” 2 - - 2 27 Screw Driver 6” 2 - - 4 28 Insulated cutting plier (8”,12”) 4 2 2 4 29 Insulated Nose Plier (8”) 2 - - 2 30 Adjustable Pillars Wrench 10” 2 1 1 1 31 Adjustable Spanner 12” 2 1 - 1 32 Adjustable Spanner 8” 2 1 - 1 33 Adjustable Spanner 6” - - - 1 34 Set of Screw Driver 2 1 - 2 35 Pipe Wrench 12” 1 - - 1 36 Pipe Wrench 8” - - - 1 37 Hacksaw frame Adj. 12” 2 1 1 2 38 Plumb bob 4 1 1 2 39 Spirit level 12” 1 1 - - 40 Spirit level 6” 2 1 - 1 41 Allen Key Sizes (2 to 10mm) - - - 2 Over Head Equipments Page 140  42 Detonators Boxes 1 1 1 - 43 Banners Flags 2 2 2 - 44 Hand Signal Flags (Red & Green) 6 2 2 - 45 Hand Signal lamps 2 2 2 - 46 Blow Lamp ½ Ltr. Cap. 2 - - 2 47 Wall Clocks 1 - - - 48 Grease Gun 2 - - 1 49 G.I. Pots 2 - - 2 50 Oil Sampling bottles - - - 6 51 Hydrometers - - - 4 52 Thermometers 2 - - 4 53 Crow Bars 4 - 2 2 54 Pick Axe 4 - 2 1 Annexure A6.07 Transport Facilities for TRD Maintenance Sl. Unit Type/No. of Vehicles. No. Jeep Tower Heavy Motor Push Wiring with Car. duty Trolley Trolley Cum Trailer motor Break truck Down Train 1 (a) Each station - - - 1 - - Where an OHE Officer is based (b) Each field officer at his Headquarters i) OHE 1 ii) PSI 1 2 OHE Depot 1 1 1 3 Zonal Repair Shop 1 4 Divisional 1 Headquarters/Divisio nal Repair Shop Over Head Equipments Page 141