Podcast
Questions and Answers
What is the primary purpose of the Auxiliary Converter Unit (ACU)?
What is the primary purpose of the Auxiliary Converter Unit (ACU)?
- To supply power to the traction system and auxiliary loads (correct)
- To provide heating in the passenger compartment
- To store energy for emergency use
- To control the speed of the train's motors
Where is the Auxiliary Converter Unit typically installed in a basic train unit?
Where is the Auxiliary Converter Unit typically installed in a basic train unit?
- In the leading car of the train
- In the middle car's high-tension compartment (correct)
- In the passenger compartment
- In the rear car of the train
What output voltage does the Auxiliary Converter Unit provide for charging batteries?
What output voltage does the Auxiliary Converter Unit provide for charging batteries?
- AC 110V
- DC 220V
- AC 415V
- DC 110V (correct)
During AC operation, how is the Auxiliary Converter Unit fed?
During AC operation, how is the Auxiliary Converter Unit fed?
What happens if an Auxiliary Converter Unit fails?
What happens if an Auxiliary Converter Unit fails?
Which output of the Auxiliary Converter Unit supplies the passenger compartment fan?
Which output of the Auxiliary Converter Unit supplies the passenger compartment fan?
What is the input voltage designed for the Auxiliary Converter Unit?
What is the input voltage designed for the Auxiliary Converter Unit?
What is the primary function of the Pulse-width-modulated inverter modules in the Auxiliary converter?
What is the primary function of the Pulse-width-modulated inverter modules in the Auxiliary converter?
Which component is responsible for charging the battery in the train?
Which component is responsible for charging the battery in the train?
What type of voltage do the Pulse-width-modulated inverter modules operate with?
What type of voltage do the Pulse-width-modulated inverter modules operate with?
How are the PWM outputs from the inverter modules utilized in the system?
How are the PWM outputs from the inverter modules utilized in the system?
What components work alongside the main transformer to support the operation of the Auxiliary converter?
What components work alongside the main transformer to support the operation of the Auxiliary converter?
Which of the following is a correct relationship between the Battery charger and the main Transformer?
Which of the following is a correct relationship between the Battery charger and the main Transformer?
What is the role of the sine filter resistor in the Auxiliary converter?
What is the role of the sine filter resistor in the Auxiliary converter?
Identify one component that is used to support the internal temperature management of the Auxiliary converter unit.
Identify one component that is used to support the internal temperature management of the Auxiliary converter unit.
Which component's function is solely to prevent voltage spikes in the circuit?
Which component's function is solely to prevent voltage spikes in the circuit?
What voltage is generated at the output by the battery charger?
What voltage is generated at the output by the battery charger?
What current is the maximum battery charging current specified as?
What current is the maximum battery charging current specified as?
Under which condition does the Auxiliary Converter Unit switch ON automatically?
Under which condition does the Auxiliary Converter Unit switch ON automatically?
What is the charging voltage when the battery charging current decreases?
What is the charging voltage when the battery charging current decreases?
How are the PWMI modules activated?
How are the PWMI modules activated?
What happens when the activation signal is withdrawn by the vehicle control?
What happens when the activation signal is withdrawn by the vehicle control?
Which device rectifies the input for battery charging?
Which device rectifies the input for battery charging?
What is the nominal voltage of the lead acid batteries used in the train?
What is the nominal voltage of the lead acid batteries used in the train?
What component is used to filter the output of the ACU?
What component is used to filter the output of the ACU?
What feature does the IU-characteristic refer to?
What feature does the IU-characteristic refer to?
What is the primary function of the M1300 SIBCOS Main controller?
What is the primary function of the M1300 SIBCOS Main controller?
Which component is responsible for communication between the Auxiliary Converter and external devices?
Which component is responsible for communication between the Auxiliary Converter and external devices?
What is the purpose of the DC Line choke?
What is the purpose of the DC Line choke?
How many primary windings does the Main Transformer have?
How many primary windings does the Main Transformer have?
What is the function of the Battery Charger filter choke?
What is the function of the Battery Charger filter choke?
Which voltage outputs does the Main Transformer provide?
Which voltage outputs does the Main Transformer provide?
What role does the Main Blower serve in the system?
What role does the Main Blower serve in the system?
What type of choking mechanism is utilized in the DC Line choke?
What type of choking mechanism is utilized in the DC Line choke?
Which component would you identify as essential for the AC-DC conversion process?
Which component would you identify as essential for the AC-DC conversion process?
What type of voltage does the DC Line choke primarily focus on filtering?
What type of voltage does the DC Line choke primarily focus on filtering?
What is the static tolerance of the output voltage for the 110 V AC supply?
What is the static tolerance of the output voltage for the 110 V AC supply?
What is the maximum output current of the 110 V DC battery charging equipment?
What is the maximum output current of the 110 V DC battery charging equipment?
Which of the following is NOT part of the safety regulations for working on the ACU?
Which of the following is NOT part of the safety regulations for working on the ACU?
What is the total harmonic distortion of the output for the AC supply?
What is the total harmonic distortion of the output for the AC supply?
What is the nominal power output for the 110 V DC battery charging equipment?
What is the nominal power output for the 110 V DC battery charging equipment?
What is the static tolerance range of the output voltage for 110 V DC supply?
What is the static tolerance range of the output voltage for 110 V DC supply?
What is the maximum continuous output current specified for the 110 V DC battery charging equipment?
What is the maximum continuous output current specified for the 110 V DC battery charging equipment?
Which aspect of voltage control has a precision of ±5% in the 110 V DC system?
Which aspect of voltage control has a precision of ±5% in the 110 V DC system?
How much is the total harmonic distortion specified for the AC supply output?
How much is the total harmonic distortion specified for the AC supply output?
What is the maximum voltage rise rate of the output voltage specified in the document?
What is the maximum voltage rise rate of the output voltage specified in the document?
What condition must be met for the Auxiliary Converter Unit to automatically switch ON?
What condition must be met for the Auxiliary Converter Unit to automatically switch ON?
What occurs when the voltage at the PWMI output is in the specified range?
What occurs when the voltage at the PWMI output is in the specified range?
How does the charging process of lead acid batteries proceed after reaching a voltage of 110V?
How does the charging process of lead acid batteries proceed after reaching a voltage of 110V?
Which components are involved in feeding the DC input voltage to the PWMI modules?
Which components are involved in feeding the DC input voltage to the PWMI modules?
What is the maximum device current specified for the Auxiliary Converter Unit?
What is the maximum device current specified for the Auxiliary Converter Unit?
When does the Auxiliary Converter Unit switch OFF automatically?
When does the Auxiliary Converter Unit switch OFF automatically?
What type of characteristic does the load program correspond to for the battery charging?
What type of characteristic does the load program correspond to for the battery charging?
What happens immediately after both PWMI modules are switched ON?
What happens immediately after both PWMI modules are switched ON?
What is the specified charging voltage when the battery current continues to decrease?
What is the specified charging voltage when the battery current continues to decrease?
What is the primary application of the Pulse-width-modulated inverter modules in the Auxiliary converter?
What is the primary application of the Pulse-width-modulated inverter modules in the Auxiliary converter?
Which component directly connects the output of the Pulse-width-modulated inverter modules to the system?
Which component directly connects the output of the Pulse-width-modulated inverter modules to the system?
How is the DC voltage for the Battery charger module in the Auxiliary Converter derived?
How is the DC voltage for the Battery charger module in the Auxiliary Converter derived?
What function does the sine filter resistor serve within the Auxiliary Converter unit?
What function does the sine filter resistor serve within the Auxiliary Converter unit?
What does the Battery charger module specifically cater to in the Auxiliary Converter?
What does the Battery charger module specifically cater to in the Auxiliary Converter?
Which part of the Auxiliary converter is responsible for temperature regulation?
Which part of the Auxiliary converter is responsible for temperature regulation?
What is a primary role of the decoupling diode in the Auxiliary converter system?
What is a primary role of the decoupling diode in the Auxiliary converter system?
What is the maximum short time voltage allowable in DC mode for input to the system?
What is the maximum short time voltage allowable in DC mode for input to the system?
What is the output voltage range for the AC mode operation of the Auxillary Converter?
What is the output voltage range for the AC mode operation of the Auxillary Converter?
Which of the following describes the output frequency tolerance for the 415V AC output?
Which of the following describes the output frequency tolerance for the 415V AC output?
What is the maximum permissible voltage rise rate for the AC output voltage?
What is the maximum permissible voltage rise rate for the AC output voltage?
What is the ripple percentage specified for the DC input in DC mode?
What is the ripple percentage specified for the DC input in DC mode?
What is the maximum dynamic tolerance of the output voltage for the 415V AC supply?
What is the maximum dynamic tolerance of the output voltage for the 415V AC supply?
What component is specifically used for output filtering in the AC supply?
What component is specifically used for output filtering in the AC supply?
What is the nominal power output of the single-phase 110V AC supply?
What is the nominal power output of the single-phase 110V AC supply?
How much total harmonic distortion is allowed for the AC output in the system?
How much total harmonic distortion is allowed for the AC output in the system?
What is the maximum unsymmetrical load permitted on the 87 kVA output?
What is the maximum unsymmetrical load permitted on the 87 kVA output?
What is the primary function of the M9000 CAN bus Communication card?
What is the primary function of the M9000 CAN bus Communication card?
What is the output configuration of the main transformer connected to the PWM inverter?
What is the output configuration of the main transformer connected to the PWM inverter?
How does the Battery Charger filter choke function in relation to the AC-DC conversion?
How does the Battery Charger filter choke function in relation to the AC-DC conversion?
What is the role of the DC Line choke within the converter system?
What is the role of the DC Line choke within the converter system?
Which statement correctly describes the feedback system in the Auxiliary Converter?
Which statement correctly describes the feedback system in the Auxiliary Converter?
What cooling function does the Main blower provide?
What cooling function does the Main blower provide?
What type of voltage outputs does the main transformer provide?
What type of voltage outputs does the main transformer provide?
In the context of ripple filtering, what is the significance of the DC Line choke?
In the context of ripple filtering, what is the significance of the DC Line choke?
Which component is primarily responsible for fault detection within the Auxiliary Converter?
Which component is primarily responsible for fault detection within the Auxiliary Converter?
Flashcards
ACU function
ACU function
The Auxiliary Converter Unit (ACU) supplies power to the train's systems, including the battery charger.
ACU input voltage
ACU input voltage
The ACU receives a DC 1500V input voltage from the traction link.
ACU location
ACU location
The ACU is positioned in the middle car (motor coach) of a three-part train unit.
ACU's AC output
ACU's AC output
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ACU's DC output
ACU's DC output
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Backup power supply
Backup power supply
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ACU input during AC operation
ACU input during AC operation
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Pulse-width-modulated Inverter (PWMI)
Pulse-width-modulated Inverter (PWMI)
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Battery Charger Module (T3)
Battery Charger Module (T3)
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Auxiliary Converter
Auxiliary Converter
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DC Supply
DC Supply
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PWM Output
PWM Output
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Main Transformer (T4)
Main Transformer (T4)
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Battery Charging
Battery Charging
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DC link voltage
DC link voltage
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High DC link voltage operation
High DC link voltage operation
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M1300 SIBCOS Main Controller
M1300 SIBCOS Main Controller
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M9000 CAN bus Communication Card
M9000 CAN bus Communication Card
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DC Line Choke (Line Filter)
DC Line Choke (Line Filter)
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PWM Inverter Outputs
PWM Inverter Outputs
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Main Transformer
Main Transformer
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Battery Charger Filter Choke
Battery Charger Filter Choke
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Main Blower
Main Blower
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3-phase 415-volt output
3-phase 415-volt output
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ACU's DC Power Output
ACU's DC Power Output
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ACU DC Output Characteristics
ACU DC Output Characteristics
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How does the ACU power the battery?
How does the ACU power the battery?
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DC 110V Output Power
DC 110V Output Power
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ACU Control Precision
ACU Control Precision
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ACU Activation
ACU Activation
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ACU Input Power
ACU Input Power
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PWMI Modules
PWMI Modules
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Output Fuses
Output Fuses
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Battery Charging Current
Battery Charging Current
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Battery Charger Output
Battery Charger Output
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ACU Shutdown
ACU Shutdown
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ACU Output Types
ACU Output Types
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Sine Filter
Sine Filter
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EMV Filter
EMV Filter
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Auxiliary Converter Unit (ACU)
Auxiliary Converter Unit (ACU)
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Battery Charger Module
Battery Charger Module
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DC 110V Output Purpose
DC 110V Output Purpose
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DC 110V Output Voltage Tolerance
DC 110V Output Voltage Tolerance
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Ripple on Output Voltage
Ripple on Output Voltage
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Battery Charging Characteristics
Battery Charging Characteristics
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Input DC Voltage (DC mode)
Input DC Voltage (DC mode)
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Input DC Voltage (AC mode)
Input DC Voltage (AC mode)
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Ripple (DC mode)
Ripple (DC mode)
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Ripple (AC mode)
Ripple (AC mode)
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Three-Phase AC Output
Three-Phase AC Output
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Single-Phase AC Output
Single-Phase AC Output
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Static Voltage Tolerance
Static Voltage Tolerance
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Dynamic Voltage Tolerance
Dynamic Voltage Tolerance
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Max. Voltage Rise
Max. Voltage Rise
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Total Harmonic Distortion
Total Harmonic Distortion
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What is the ACU?
What is the ACU?
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How does the ACU start?
How does the ACU start?
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What is the role of PWMIs?
What is the role of PWMIs?
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What is the battery charging process?
What is the battery charging process?
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What are the ACU's outputs?
What are the ACU's outputs?
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What happens when the ACU shuts down?
What happens when the ACU shuts down?
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What does the main transformer do?
What does the main transformer do?
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What are the functions of the filters?
What are the functions of the filters?
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What is the role of the DC line choke?
What is the role of the DC line choke?
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What powers the ACU during AC operation?
What powers the ACU during AC operation?
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Study Notes
Auxiliary Converter Unit (ACU)
- The ACU supplies power to the train's electrical systems, including the battery charger.
- It's installed centrally in a motor coach of a three-part train.
- Operates with a DC 1500V input.
Installation Position
- Each three-part train unit has one ACU.
- Positioned in the high-tension compartment of the middle car (motor coach).
Supply System
- The ACU's input is connected to the traction link.
- During AC operation, the ACU's input is the traction regulators.
- During DC operation, the power source is the traction system's input filter.
- The ACU creates a 3-phase AC 415V output, feeding rotary current drives (e.g., compressors).
- It generates a 110V AC output for passenger compartment fans and lighting.
- It provides a 110V DC output for battery charging and other devices.
Component Layout
- Diagrams show the placement of major converter unit components.
- Includes pulse-width-modulated inverters and a battery charger.
- Contains mounting plates and component locations within the cabinet.
Functions of Major Components
- PWMI Modules: Used for pulse-width modulation inverter operation. Connected to the transformer with series connections for high DC link voltages
- Battery Charger Module: Charges the train's battery, receiving 3 phase AC power.
- Master Controller: Oversees the ACU's operation, receiving feedback for fault detection.
- CAN Bus Controller: Communicates between different parts, using a CAN bus network.
- Line Filter Choke: Filters ripple in the DC link voltage fed to the PWMI modules.
Cooling System
- Forced-air cooled with a main fan and two internal fans.
- Receives cooling air from the auxiliary operator console, which circulates through the modules and transformer.
- Exits via a ventilation grate at the bottom of the cabinet.
Electrical Data
- Input DC 1500V:
- Nominal input voltage: 1500V
- Voltage range (stationary): 1000-1800V
- Occasional maximum: 2000V
- Three-Phase AC 415V 50Hz Output:
- Frequency: 50Hz ±1%
- Voltage: 415V AC, 3-phase
- Static output voltage tolerance: ±5%
- Dynamic output voltage tolerance: ±15%
- Single Phase 110V AC 50Hz Output:
- Frequency: 50Hz ±1%
- Voltage: 110V AC, 1-phase
- Static output voltage tolerance: ±10%
DC 110V Output
- Provides power for battery charging equipment; a backup for normal lighting and fan systems.
- The DC 110V is generated through the main transformer, sinusoidal filter, EMV filter, and output fuses.
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Description
This quiz covers the key aspects of the Auxiliary Converter Unit (ACU) used in three-part trains. It includes the ACU's power supply functions, installation positions, and the various outputs it provides to support the train's electrical systems. Test your knowledge on the ACU's components and operational features.
