Maintenance Depot Guidelines

A larger OHE maintenance depot equipped with a tower wagon shed, tracks, and OHE Depot Workshop.

A smaller OHE maintenance depot without a tower wagon facility or dedicated workshop.

A basic OHE depot needs tools like a drilling machine and bench grinder.

Smithies, carpentry, welding, and other secondary facilities can be centrally located at a divisional level for convenience or a maintenance depot to reduce duplication of equipment.

A depot focused on maintaining power supply equipment for traction, switching, and transformer installations.

Locating OHE and PSI depots together can save on infrastructure costs and transportation.

The typical distance between traction substations in normal circumstances is 60-70km.

In high-traffic areas, substations are placed closer together, 40-45km, for more frequent servicing of trains.

PSI depots can be located at alternate OHE depots, rather than every OHE depot, to minimize PSI staff.

Combining OHE and PSI depots in one location reduces costs by sharing infrastructure and security, improving coordination and potentially faster response times to breakdowns.

A specialized repair shop for significant equipment maintenance issues, serving as a back-up to sub-stations and preventing unnecessary transport.

Equipment transportation to PSI depots can be minimized by utilizing nearby traction sub-stations for major maintenance.

A station where power supply from 100 kVA auxiliary transformer is available for PSI maintenance.

PSI maintenance functions are likely concentrated at or around traction sub-stations.

Combining OHE and PSI maintenance depots in one location facilitates better coordination between OHE and PSI maintenance staff.

A device used to test the resistance of an earth connection, ensuring safety and proper grounding.

A precise measuring instrument used to measure small distances and thicknesses.

Two-way communication radios with a power output of 2 Watts.

A telephone specifically designed for use in emergencies and for quick communication.

A mechanical lifting device with a lifting capacity of 3 tons useful for lifting.

A mechanical lifting device with a lifting capacity of 5 tons useful for lifting.

A versatile measuring instrument used for measuring voltage, current, and resistance in electrical circuits.

A kit containing the essential supplies for immediate treatment of minor injuries

Strong ropes used for lifting and securing heavy objects.

Device to measure electrical insulation resistance.

High-voltage insulation tester, operating at 500V.

Device to measure the resistance to earth for electrical safety.

Machine used for cutting 75mm channels, powered by a motor

Motorized machine for drilling 25mm holes, radial or pillar type

Double-ended, pedestal-mounted grinder with a 203mm disc

Hand-operated blower for use in a blacksmith's shop

Hydraulic compressor used for conductor splicing

Welding equipment with 400 Amps capacity in a 3-phase system

Portable set for welding and cutting, with cylinders, trolley & helmet

Box containing medical supplies for minor injuries

Buckets with a 10-liter capacity for fire fighting

Portable fire extinguisher with DCP type

Portable fire extinguisher with foam type

Portable generator with 0.75kVA capacity

Blacksmith hammer weighing 12kg

Blacksmith hammer weighing 10kg

Precision measuring tool for millimeters

Measuring tape of 30 meters and 15 meters each

Workholding tool 6 inches in size at the bench

Anvil for blacksmith work, 2 feet in size

Electric grinder for various tasks

Kit for testing primary injection currents up to 500 Amps

Kit for testing secondary injection currents up to 50 Amps

Kit for testing MHO relays

Large plant for oil filtration, 2500 L capacity

Plant for oil filtration, 250 L capacity

Distillation plant for producing 50 liters of distilled water

Megger to measure insulation resistance at 5 kV

Megger to measure insulation resistance at 2.5 kV

Megger to measure insulation resistance at 500 Volts

Hydraulic jack to lift objects up to 50 tonnes

Clamps used to hold aluminium conductors (20 mm²).

Clamps used to secure earth wires (19/2.5 mm).

Jumpers connecting rails with clamps at both ends.

Extensible jumpers with a clamp on one end.

Complete earthing discharge rod assembly.

An 8-meter aluminium ladder with a hook.

An extendable 11-meter aluminium ladder.

Motor-driven drilling machine with 25 mm capacity.

A double-ended motorized grinder (203 mm disc).

A gas welding and cutting set with cylinders and trolley.

Compressor used for conductor splicing.

A 21 mm single-phase, 230 V drill.

A 100/200 amp welding generating set.

A 3 kVA, 240 V, single-phase diesel generator.

Floodlight fixture with 500-watt lamps.

A box containing first-aid supplies.

Fire buckets with a 10-liter capacity.

Dry chemical powder fire extinguisher (10 liters).

Foam fire extinguisher (9 liters).

Tool for cutting contact wires (36 inches).

A set of D-shackles in various sizes (1", 3/4", 5/8", 1/2").

Steel pulley block (3 1/2" x 1/2" groove).

Fiber pulley block for catenary wire.

Steel pulley block (6" x 1" groove).

Tool to bend and twist contact wires (6 inches).

Steel sling with an eye on each end.

Equipment for turning/moving heavy objects.

Tool for splicing contact wire efficiently.

2-kilogram copper hammer.

Instrument for precise measurements.

Measuring tape with lengths 30m and 15m.

6-inch bench vice.

Trolleys for transporting loads.

Ratchet used for tightening/loosening bolts.

Siren with a 1km range.

Portable lighting devices.

2500V Insulation tester used in electrical inspections

Measuring instrument for force and torque.

PSI depots should be placed at alternative OHE depots to reduce PSI staff numbers.

Combining OHE and PSI depots in one location reduces costs (shared infrastructure), improves coordination, and potentially speeds up response times.

A specialized repair shop for major equipment issues, acts as a backup for substations and reduces unnecessary transportation.

Transportation of equipment to PSI depots can be minimized by using nearby traction substations for major maintenance.

A station with a 100 kVA auxiliary transformer power supply, essential for PSI maintenance.

PSI maintenance tasks are likely clustered around traction substations.

Combining OHE and PSI maintenance depots improves coordination between staff, potentially leading to faster responses to breakdowns.

A larger OHE maintenance depot with a tower wagon shed, associated tracks, and an OHE depot workshop.

A smaller OHE maintenance depot without a tower wagon or dedicated workshop.

Basic OHE maintenance tools include a drilling machine and bench grinder.

Centralized smithy, carpentry, and welding services can be located at divisional headquarters or a central depot.

A depot focused on maintaining power supply equipment for traction, switching, and transformers.

Grouping OHE and PSI depots saves resources by sharing infrastructure and transportation.

Standard spacing between traction substations is 60-70 km, but can be reduced in areas with high traffic (40-45 km).

PSI depots may be located alongside OHE depots to share resources, but not necessarily at every OHE depot.

Combining OHE and PSI depots improves collaboration and response during breakdowns.

Machine for cutting 75mm channels, powered by a motor

Motorized machine for drilling 25mm holes, radial or pillar type.

Double-ended, pedestal-mounted grinder with a 203mm disc.

Hand-operated blower for use in a blacksmith's shop

Hydraulic compressor used for conductor splicing

Welding equipment with 400 Amps capacity in a 3-phase system.

Portable set for welding and cutting, with cylinders, trolley & helmet.

Box containing medical supplies for minor injuries

Buckets with a 10-liter capacity for fire fighting.

Portable fire extinguisher with DCP type.

Portable generator with 0.75kVA capacity

Blacksmith hammer weighing 12kg.

Precision measuring tool for millimeters.

Measuring tape with lengths 30m and 15m.

6-inch bench vice.

A device to measure the resistance of an earth connection, ensuring grounding safety.

Optical instrument for viewing distant objects.

Precision measuring instrument for small distances.

Two-way radios with 2-watt output power.

Telephone for use in emergencies and urgent situations.

Versatile instrument measuring voltage, current, and resistance.

Mechanical lifting device with 3 tons lifting capacity.

Mechanical lifting device with 5 tons lifting capacity.

Pump used for handling liquids, often in barrels.

Set of 'D' shaped metal connectors in various sizes.

Steel ropes with specified lengths for lifting and rigging.

Steel ropes with 10 meters length.

Lifting device using chains and pulleys, with 3-ton capacity.

Single pulley with 3-ton load lifting capacity.

Box containing first aid supplies for treating minor injuries.

Device for carrying injured people.

Buckets used for firefighting.

Device to measure electrical insulation resistance at 2.5 kV.

Device to measure high insulation resistance at 5 kV.

High-voltage insulation tester operating at 500 volts.

Kit used to analyze properties of oil.

Plant to filter oil up to 125 liters.

Device to measure electrical insulation at 250 volts.

Clamps designed to hold aluminium conductors with a cross-sectional area of 20 mm².

Clamps used to secure earth wires with a diameter of 19/2.5 mm.

Jumpers connecting railroad rails, equipped with clamps on both ends.

Extendable jumpers for railway rails, with a clamp on one end.

Complete assembly for safely discharging static electricity from railway lines.

An 8-meter aluminium ladder with a hook at the top.

An extendable aluminium ladder reaching 11 meters.

Motor-driven drilling machine with a 25 mm drilling capacity.

Double-ended, pedestal-mounted grinder with a 203 mm grinding disc.

Portable gas welding and cutting equipment with cylinders, trolley, and helmet.

Compressor used in conductor splicing and other tasks.

A 21 mm single-phase, 230 V drill.

A 100/200 amp welding generating set.

Floodlight fixture with 500-watt lamps for illumination.

Box containing first aid supplies for minor injuries.

Fire buckets with a 10-liter capacity for small fires.

Portable fire extinguisher for fire suppression using dry chemical.

Portable fire extinguisher for fire suppression using foam.

Tool used for cutting contact wires, 36 inches long.

Set of D-shackles in various sizes for lifting and securing.

Steel pulley block with a 3.5" x 0.5" groove, for lifting tasks.

Fiber pulley block for lifting and pulling contact wires.

Steel pulley block with a 6" x 1" groove for lifting.

Tool for twisting and bending contact wires, 6 inches long.

Steel sling with an eye on each end, for secure lifting.

Device for rotating or maneuvering heavy loads.

Tool for efficiently splicing and joining contact wires.

Copper hammer weighing 2 kilograms.

Precision measuring instrument for very small distances.

Measuring tape with lengths of 30 meters and 15 meters.

Bench vice with a 6-inch jaw capacity.

Trolleys used for transporting heavy loads.