Evolution of Electrical Rolling Stock

An older type of rectifier used in early electric locomotives, utilizing mercury vapor to convert AC to DC.

A type of externally fired, air-cooled rectifier, replacing water-cooled mercury arc rectifiers.

A modern rectifier, using semiconductor diodes for efficient AC to DC conversion.

A motor that runs on alternating current electricity.

A motor that runs on direct current electricity.

Adjusting the electrical voltage supplied to the traction motors in electric locomotives.

A device that adjusts the voltage in a power system.

Electric locomotives utilizing silicon rectifiers.

The electrical system in a WAG-6A locomotive that carries power from the overhead line to the traction motors.

The source of electrical power for the locomotive, utilizing a high voltage AC system.

In the locomotive's main circuit, it ensures current flows through the wheels and rails to the ground.

Parts of the locomotive's main circuit that control the power to individual traction motors.

Electrical components that rectify (change) the AC power from the overhead line to DC power to run the traction motors.

A method in the convertors to smooth the current flowing to the motors, and control the acceleration/deceleration.

Equipment used to minimize variations in power factor and psophometric current generated by the convertors on the locomotives electrical network.

Electric motors that provide the locomotive's tractive effort (force) to move the train.

DC motors used in locomotives where the field current is independent of the armature current. Improves efficiency.

A component in series with each motor in the locomotive, used to smooth the current generated by the convertors.

A safety device that opens the circuit in case of an overload or fault in the electrical system.

A transformer used to measure voltage in an electrical system.

A system that detects and displays fault conditions in a locomotive.

The "brain" of the FIS, supervising running conditions.

The electrical supply line above the train.

A mechanical device that collects power from the overhead line.

The transformer that converts electrical power from the overhead line.

Groups of motors that drive the locomotive.

Electronical components that change alternating current (AC) to direct current (DC).

Components that control current flow in convertors.

Technique used by convertors to accelerate, by firing both thyristor bridges progressively.

Equipment that ensures the locomotive's power usage aligns with the supply network's needs.

Unwanted components in Alternating Current (AC) power.

Compound wound motors in electric locomotives, with a specific field strength ratio (approximately 60:40 separate to series).

A type of locomotive suspension system where the traction motors are fully suspended.

A type of locomotive suspension system where the traction motors are nose-suspended.

A device that controls the field current in traction motors, crucial for acceleration and braking.

Adjusting the field current to match the required motor characteristics during acceleration and braking.

A system that improves the power factor of electric locomotives using LC-links switched by thyristors.

Switching on/off additional power factor correction units to compensate for changing primary current.

Continuous monitoring of currents (all windings and motor fields, main transformer) through current transformers (CT).

A computerized system using a microprocessor that monitors all running conditions, indicating and reporting faults or problems to quickly inform the driver.

A safety device that opens the main circuit to protect the locomotive, triggered by overcurrent conditions.

Component housing surge-suppression equipment and thyristors in AC traction systems.

Device protecting equipment from lightning surges on the roof of the locomotive.

Electric motors driving the locomotive's wheels, located on the bogies.

Switching devices controlling the flow of electricity to traction motors.

Safety devices that disconnect power if motor current exceeds a safe limit.

Transforms high voltage AC power into lower voltage power for the locomotive.

Device that collects electrical power from overhead lines.

Transformer used with the primary overload relay to detect excessive current in the primary circuit.

Safety device that disconnects power based on high current in the primary circuit.

Transformer used to monitor current in the secondary circuit of an AC traction system.

Safety device in the secondary circuit, protecting equipment from overload.

Safety devices that protect against surges in the rectifier circuit.

Capacitors used to suppress voltage surges in the rectifier circuit.

Protection device that acts to interrupt current flow in the event of a surge.

Transformer designed to suppress voltage surges within the rectifier circuit.

Resistors used to dissipate excess surge energy and lessen the effect of voltage spikes.

Inductor that smooths out fluctuations in the DC output of the rectifier.

Semiconductor devices that control the flow of electricity in AC traction systems.

Devices that detect wheel slip to prevent damage to the traction motors.

Resistors that dissipate energy in the event of wheel slip.

An older type of rectifier, using mercury vapor to convert AC to DC. Used in older locomotives

Air-cooled rectifier, replacing water-cooled mercury arc rectifiers for better reliability.

Modern rectifier using diodes for efficient AC-DC conversion. Reliable and powerful

Motor operating on alternating current (AC).

Motor that runs on direct current (DC).

Adjusting the electrical voltage supplied to the traction motors.

Device to adjust voltage levels in a power system.

Electric locomotives using silicon rectifiers.

Source of high-voltage AC power for electric locomotives.

Electrical components changing AC to DC for traction motors.

The maximum load a locomotive can pull at different speeds and grades.

A flat track with no incline or decline.

A track that rises or falls by 1 unit for every 500 units of horizontal distance.

The weight a locomotive can pull at a specific speed on a given grade.

A specific type of electric locomotive.

A straight section of railway track.

Initial tractive effort of the locomotive.

Different types of locomotives with various driving mechanisms like cordon shaft drive, coupled gear drive, monomotor bogie, etc.

A locomotive type using a cordon shaft drive system.

Locomotives using WN coupled gear drive.

Locomotives using a coupled gear drive system through a cordon shaft monomotor bogie.

Locomotive with a monomotor bogie and flexible rubber couplings (quill drive).

Starting tractive effort of locomotives with monomotor bogies was approximately 32 tonnes with 790 HP motor power per axle.

A significant portion of WAG1 and WAG4 class locomotives were manufactured at Chittranjan Locomotive Works (CLW) up to early 1970s.

A locomotive type (WAG 5) that utilized Co-Co, tri-mount bogies of ALCO design with axle-hung nose-suspended traction motors.

WAG-6A and WAG-6B locomotives aimed for high tractive effort and high speeds (above 160 km/h) by employing a 6-axle (Bo-Bo-Bo) arrangement.

WAP-1 locomotives used Flexicoil bogie design, modifying the existing WDM-1 (General Motors design).

A safety device that opens the circuit in case of overload or fault in the electrical system of a locomotive.

A transformer used to measure voltage in an electrical system, often for monitoring purposes in locomotives.

A system in a locomotive that detects and displays fault conditions, enabling the driver to reset faults from the cab.

The central processing unit of the FIS, supervising running conditions to monitor faults.

The electrical supply line above the train, providing power to the locomotive.

A mechanical device that collects power from the overhead line and transfers it to the locomotive.

The transformer converting high-voltage AC power from the overhead line to lower voltage power for the locomotive.

Groups of electric motors within a locomotive that drive the locomotive's wheels

Electrical components changing AC power to DC power that operates traction motors.

A control method in convertors which involves progressively firing multiple thyristor bridges to control acceleration and deceleration smoothly.

Equipment used to control the variations in power factor and psophometric current generated by the convertors, ensuring they do not disrupt the supply system

Electric motors that provide the locomotive's tractive effort to move the train.

A component housing surge-suppression equipment and thyristors in AC traction systems.

A device on the locomotive roof that protects equipment from lightning surges.

Electric motors driving the locomotive's wheels, located on the bogies.

Switching devices controlling the flow of electricity to traction motors.

Safety devices that disconnect power if motor current exceeds a safe limit.

Transforms high voltage AC power into lower voltage power for the locomotive.

Device that collects electrical power from overhead lines.

Transformer used with the primary overload relay to detect excessive current in the primary circuit.

Safety device that disconnects power based on high current in the primary circuit.

Transformer used to monitor current in the secondary circuit of an AC traction system.

Safety device in the secondary circuit, protecting equipment from overload.

Safety devices that protect against surges in the rectifier circuit.

Capacitors used to suppress voltage surges in the rectifier circuit.

Protection device that acts to interrupt current flow in the event of a surge.

Transformer designed to suppress voltage surges within the rectifier circuit.

Resistors used to dissipate excess surge energy and lessen the effect of voltage spikes.

Inductor that smooths out fluctuations in the DC output of the rectifier.

Semiconductor devices that control the flow of electricity in AC traction systems.

Devices that detect wheel slip to prevent damage to the traction motors.

Resistors that dissipate energy in the event of wheel slip.