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Questions and Answers
What is the nominal DC link circuit voltage for traction operation?
What is the nominal DC link circuit voltage for traction operation?
Where is the Traction Converter Cubicle installed?
Where is the Traction Converter Cubicle installed?
The HT compartment of the motor coach.
What is the name of the unit that controls and monitors the Traction Converter?
What is the name of the unit that controls and monitors the Traction Converter?
The Traction Converter works on a single voltage system.
The Traction Converter works on a single voltage system.
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What is the purpose of the Pre-charging Resistor in the Traction Converter?
What is the purpose of the Pre-charging Resistor in the Traction Converter?
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What is the name of the bridge that transforms the input voltage into a controlled direct voltage for the DC link circuit?
What is the name of the bridge that transforms the input voltage into a controlled direct voltage for the DC link circuit?
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The IGBTs are used as switches with a low closing sequence.
The IGBTs are used as switches with a low closing sequence.
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The brake chopper is connected to the brake chopper for protection only during over voltage protection of the DC link.
The brake chopper is connected to the brake chopper for protection only during over voltage protection of the DC link.
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What is the purpose of the Protective Resistors in the Brake Chopper?
What is the purpose of the Protective Resistors in the Brake Chopper?
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What kind of system is the Traction Converter Cabinet?
What kind of system is the Traction Converter Cabinet?
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What is the type of the module that controls the four quadrants in the Traction Converter?
What is the type of the module that controls the four quadrants in the Traction Converter?
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Match the Traction Converter components with their corresponding functions:
Match the Traction Converter components with their corresponding functions:
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What is the main function of the SIBAS 32S?
What is the main function of the SIBAS 32S?
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Study Notes
Traction Converter Cubicle
- The traction converter cubicle is a complete unit in the motor coach's high-tension compartment
- The traction control unit (TCU) is inside the cabinet
- Nominal input voltage is 2 x 950 V AC, 50 Hz / 1500V DC
- AC input voltage range: 627 V - 1083 V
- AC input voltage is related to a line voltage of 16.5-28.5 kV
- AC input frequency range: 46 Hz - 54 Hz
- DC input voltage range: 800 – 1800 V
- Nominal DC link circuit voltage: AC Mode 1800 V, DC Mode 1500 V
- Power factor in AC at different loads and line voltages is approximately unity.
Electrical System
- The traction converter uses a dual voltage system (1500V DC or 950V, 1-phase, 50Hz AC (25kV AC line))
- It has two four-quadrant choppers and two PWM inverters each supplying two traction motors
- The converter has a DC link and various components including DC link capacitors, contactors, transducers, and blowers
- The Siemens Traction control unit (TCU) SIBAS® 32S controls and monitors the converter.
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Description
This quiz covers the key components and electrical specifications of the traction converter cubicle used in motor coaches. It includes details on input voltage ranges, frequency, and the functionality of the traction control unit. Test your knowledge on the dual voltage system and related electrical systems within the converter.
