Fault Diagnostics in 3-Phase Locomotives

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Questions and Answers

What is the purpose of the isolation of sub systems in fault diagnostics?

To completely shut down the machine

To identify the root cause of a fault (correct)

To display all available status messages

To limit the fault messages to critical systems

Which information is contained in a fault message code?

A description of the system layout

The status of all subsystems

The location of the fault (correct)

The sequence of operational events

What does the display of subsystem status indicate?

The current operational state of each subsystem (correct)

The performance metrics of each subsystem

The operational efficiency of the entire system

The historical performance of the system

Which type of message is crucial for understanding the status of a machine during diagnosis?

Fault messages Signup and view all the answers

What is indicated by a high-priority fault?

The fault poses an immediate risk to safety Signup and view all the answers

What system is used in the 3-phase locomotives for precise control over tractive effort and speed?

Digital electronics based real time traction control system Signup and view all the answers

Which feature helps to mitigate the effects of weight transfer in the locomotives?

Electrical weight transfer control system Signup and view all the answers

What is the function of the anti spin protection feature?

To reduce tractive effort and stop spinning when needed Signup and view all the answers

What does the on-board fault diagnostics system help with?

Eliminating troubleshooting by isolating faults Signup and view all the answers

What role does the static auxiliary converter play in the 3-phase locomotives?

Supplies auxiliary 3-phase motors and operates at an optimum frequency Signup and view all the answers

How many convertor secondary windings are present in the electrical system?

4 Signup and view all the answers

What function do the traction converters serve during braking?

To conduct and rectify current from the traction motors to the catenary Signup and view all the answers

Which of the following is NOT involved in the roof layout of the locomotive?

Emergency flash light Signup and view all the answers

What is the purpose of the harmonic filter secondary winding?

To reduce electrical noise and distortions Signup and view all the answers

Which component is responsible for controlling the speed and torque of the traction motors?

Converter control electronics Signup and view all the answers

What happens to the traction converters when the locomotive operates in traction mode?

They conduct current from the catenary to the traction motors Signup and view all the answers

Which connections are NOT part of the outside connections on the locomotive?

Harmonic filter Signup and view all the answers

What is the role of the pantograph in the locomotive's power circuit?

To connect the locomotive with the overhead catenary for power Signup and view all the answers

What happens if the battery voltage is reduced below 82 V?

P-1 message appears with shutdown of loco. Signup and view all the answers

What is the total nominal capacity of the battery system?

199 Ah Signup and view all the answers

Which brake system is responsible for performing protective actions if configured incorrectly?

Brake Electronics. Signup and view all the answers

How long can the loco CE supply power directly from the battery?

5 hours Signup and view all the answers

What is the nominal voltage of each cell in the battery?

1.4 V Signup and view all the answers

Which condition triggers the P-2 fault message to appear on the screen?

Charging current is reduced by 10 A. Signup and view all the answers

What type of brake is spring-loaded?

Parking Brake. Signup and view all the answers

In terms of configuration, what is monitored by the brake electronics?

Brake system functions. Signup and view all the answers

What system is used for keeping the loco pilot alert during operation?

Electronic controlled vigilance system Signup and view all the answers

Which feature is implemented to provide precise control of braking effort in a locomotive?

Electronic brake system Signup and view all the answers

What design aspect is intended to enhance crew comfort in locomotives?

Spacious driving cabs Signup and view all the answers

Which system is mentioned as a method to reduce the weight transfer effect in locomotives?

Unidirectional mounting of traction motors Signup and view all the answers

What is the purpose of using inertial filters in the machine room?

To prevent dust entry into sensitive equipment Signup and view all the answers

Which feature allows for faster release of the train brakes after recreation?

Over-charge feature in the brake system Signup and view all the answers

What is the advantage of 3-phase induction motors over DC motors?

Reduced size for same output power Signup and view all the answers

What is the function of the wheel flange lubrication system?

To minimize energy consumption Signup and view all the answers

What is the primary function of the oil pump located near SR-2?

To circulate oil between the cooling units Signup and view all the answers

What happens to the frequency of auxiliary motors when one auxiliary converter fails?

The frequency drops to 37 Hz Signup and view all the answers

Which components share their load when one auxiliary converter is isolated?

Blowers and pumps related to cooling units Signup and view all the answers

Where is Scavenging Blower-1 located?

Near TMB-2 Signup and view all the answers

What is the target pressure that the main compressors aim to create?

10.0 kg/cm2 Signup and view all the answers

What activates the machine room and scavenging blowers?

As soon as the VCB is closed Signup and view all the answers

Which auxiliary converter maintains the load for the converter pump when Conv-1 is isolated?

Conv-2 and Conv-3 Signup and view all the answers

What is the primary function of the battery charger?

To charge the auxiliary battery Signup and view all the answers

Signup and view all the answers

Study Notes

3 Phase Electric Loco Operating Instructions

Technical Data: Contains specifications like voltage, frequency, axle arrangement, gear ratios, and weights for various loco types (WAP5, WAP7, WAG9).
Abbreviations: Defines acronyms used throughout the manual. Examples include abbreviations for various components, switches, and control elements.
General Features of 3 Phase Electric Loco: Describes the key technological advancements, real-time traction control, electrical weight transfer, anti-spin protection, on-board fault diagnostics, exclusive harmonic filter, and electronic speedometer.
Advantages of 3-Phase Electric Locomotives: Highlights the benefits compared to DC locomotives, including smaller traction motor size, lower maintenance costs, higher reliability, and greater overload capabilities.
Mechanical Features of 3 Phase Electric Loco: Explains the design and function of bogies, suspension systems, traction motors, and their mounting on the axles, as well as wheel flange lubrication.
System Description: Details the potential transformer, which steps down catenary voltage, and the main transformer, which steps down the 25kV AC supply for use by the traction and auxiliary converters. It also describes the various converter circuits: line converter, DC link, and drive converter.
Traction Power Circuit: Provides diagrams and details of the traction power circuits, showing the pantograph, main transformer, harmonic filter winding, traction converters, auxiliary converters, and traction motors.
Auxiliary Converter: The 3-phase, 415V AC supply from the auxiliary converter powers various auxiliaries, including oil cooling blowers, and a battery charger, and it's technical details.
Cooling Concept: Outlines the system for cooling the critical components, like transformers and traction converters, using oil cooling units and blowers.
Harmonic Filter: Explains how the harmonic filter is used to suppress high-frequency harmonics, essential for maintaining stable signaling.
Brake System: Describes various braking systems (automatic train brake, direct brake, parking brake, anti-spin brake, and regenerative braking), their function, positions for the brake controller handle and pressures.
Miscellaneous: Details additional systems such as pantograph, main reservoir, Memotel (speedometer), sanding, control electronics, and resetting of MCBs.
Protective Measures: Covers various safety and protective measures like catenary voltage range, temperature protection, overcurrent protection, and train parting mechanisms.
Preparation: Provides detailed operating procedures and essential checks for pre-running inspection, including systems, measurements, and general operation.
On-line Movement: Instructs on how to energize the loco, operation of various keys including the BL key and the reverser along with operational mode, cooling mode, driving and braking procedures., operating the throttle and the various aspects of train movement.
Fault Diagnostics: Outlines diagnosing faults, system displays, and status codes. Provides troubleshooting procedures using diagrams, including locations of circuit breakers.
Multiple Unit Operations: Explains the systems for operating the locomotives in multiple unit configurations.
Dead Loco Movement: Details steps to move a disabled (dead) locomotive in a train, including isolating components, securing the locomotive and safety procedures for moving it.
Trouble Shooting Directory: A guide for troubleshooting various issues.
Different Photographs of Loco Parts: Includes illustrations of different components.

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Description

This quiz explores the key concepts of fault diagnostics specific to 3-phase locomotives. It covers topics such as the isolation of subsystems, fault message codes, and essential diagnostic features like anti-spin protection. Test your understanding of how these elements contribute to effective machine status assessment.