2x25 kV Auto-Transformer Feed System

A system used to distribute 25 kV electric power for traction, using auto-transformers to step down the voltage.

The initial source of power for traction, usually from a grid substation supplying 132kV or 220kV power.

Transformers used in traction substations to balance loads, often essential with 2x25 kV systems due to higher loads.

A transformer that steps down extra high voltage power to 2x25 kV.

A type of transformer with multiple windings to directly step down voltage.

High-voltage wires used to deliver power to the train's traction system.

A wire running parallel to the overhead contact/catenary wire, connecting to the auto-transformer, used for power lines.

A location in the traction system where power is supplied to the rail.

Posts used to divide and combine power lines for better management and flexibility in traction systems in 25 kV systems.

Transformers using a non-flammable resin instead of oil, eliminating fire risk.

An electronic relay for overhead equipment protection, with adjustable zones for improved fault discrimination.

A relay characteristic shape used for distance protection, where the characteristic looks like a Greek letter M.

A relay type using mechanical components, prone to tripping on normal loads, not ideal for AC Traction.

A protection relay with three separate zones with different characteristics to cover different fault distances, with time delays.

An alternative relay characteristic shape found in static distance relays, requiring import currently.

The overhead lines, wires, or structures used in AC traction systems, specifically in railways.

Differentiating between faults and typical loads in a system to prevent unwanted relay trips.

Adjustable time set in zones 2 and 3 of the Distance Relay to properly distinguish between faults, especially in railway systems.

The distance between auto-transformers in a system, typically 15 km, determined during system design based on specific requirements and traffic patterns.

The power handling capacity of auto-transformers, typically 2 MVA, determined during system design based on specific requirements and traffic patterns.

A type of car designed for use in train operation, capable of speeds up to 200 km/h, and hauled by a locomotive or part of a train.

A computer-based system used to collect and process data from various sources.

A system to record video of electrical arcs caused by interruptions in power flow during locomotive pantograph contact with overhead lines (OHE).

Measurements taken on the pantograph, including aerodynamic force, contact force, movements, and current collection quality.

Measurements taken on the overhead line equipment (OHE), including wire height, stagger, gradient, hard spots, crossovers, and accelerations.

A vehicle designed for transportation both on roads and railway tracks.

A self-propelled trolley that can be transported to a work site by truck.

A type of transformer that uses cast resin instead of oil for insulation, offering maintenance-free operation.

A type of insulator with a porcelain or resin-bonded glass fiber core and molded sheds of elastomeric/plastic material, offering superior impact resistance and moisture resistance compared to traditional porcelain insulators.

Poor impact resistance, easily broken sheds, and bad hydrophobic properties (water-repellency).

Enhanced impact and moisture resistance, preventing damage and tracking.

Rules and recommendations set by the Railway Board for relay settings.

An electronic relay compared to electromechanical relays

A mechanical relay which works with electrical components.

A relay with Mho characteristic, which is one specific type of relay design.

A system distributing 25 kV electric power for train traction, employing auto-transformers to step down voltage.

Initial power source for traction, typically a grid substation supplying 132kV or 220kV power.

Transformers balancing loads in traction substations to address higher loads in 2x25 kV systems.

Transformer stepping down extra high voltage power to 2x25 kV.

Type of transformer with multiple windings to directly step down voltage.

High-voltage wires delivering power to train traction systems.

Wire running parallel to overhead contact wire, connecting to auto-transformer; part of the power lines.

Location supplying power to the rail in a traction system.

Posts dividing and combining power lines for management and flexibility in 25 kV systems

Posts containing auto-transformers along the track section.

The distance between auto-transformers in a system, typically 15 km, determined during system design based on specific requirements and traffic patterns.

The power handling capacity of auto-transformers, typically 2 MVA, determined during system design based on specific requirements and traffic patterns.

A type of car designed for use in train operation, capable of speeds up to 200 km/h, and hauled by a locomotive or part of a train.

A computer-based system used to collect and process data from various sources.

A system to record video of electrical arcs caused by interruptions in power flow during locomotive pantograph contact with overhead lines (OHE).

Measurements taken on the pantograph, including aerodynamic force, contact force, movement, and current collection quality.

Measurements taken on the overhead line equipment (OHE), including wire height, stagger, gradient, hard spots, crossovers, and accelerations.

A vehicle designed for transportation both on roads and railway tracks.

A self-propelled trolley that can be transported to a work site by truck.

A type of transformer that uses cast resin instead of oil for insulation, offering maintenance-free operation.

A transformer using a non-flammable resin instead of oil for insulation, eliminating fire risk.

An electronic relay for overhead equipment protection with adjustable zones for improved fault discrimination.

A relay characteristic shape used for distance protection; looks like the Greek letter M.

A relay type using mechanical components, prone to tripping on normal loads, not ideal for AC Traction.

A protection relay with three separate zones with different characteristics to cover different fault distances, with time delays.

An alternative relay characteristic shape found in static distance relays, requiring import currently.

The overhead lines, wires, or structures used in AC traction systems, specifically in railways.

Differentiating between faults and typical loads in a system to prevent unwanted relay trips.

Adjustable time set in zones 2 and 3 of the Distance Relay to properly distinguish between faults.

Rules and recommendations set by the Railway Board for relay settings.

A type of insulator with a core (porcelain or resin-bonded glass fiber) and molded sheds of elastomeric/plastic materials (e.g., silicone elastomer, PTFE), sealed to prevent moisture ingress.

Poor impact resistance, easily broken sheds, and lacking hydrophobic (water-resistant) properties.

An electronic relay, contrasted with electromechanical relays.

A relay that uses mechanical components to switch electrical circuits.

Rules and recommendations for relay settings issued by the Railway Board.

Configurations for a relay to detect and respond to faults in a power system.