Train Power Bus Circuit Breaker Layout in Attic Space
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Solution Overview
Problem
Existing train car designs require additional parts to suspend and protect circuit breakers, increasing weight and generating wind noise during high-speed travel, while locating breakers on the roof impairs appearance.
Innovation Solution
Integrating circuit breaking equipment into the attic space between the roof and ceiling of train cars, using connectors and circuit breakers to manage high-voltage bus lines, eliminating the need for suspension and protection members and reducing exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the circuit breaker is located under the floor of the car body, then the worker can perform electrical separation without getting on the roof, but additional suspension and protection members are required which increase car weight
Solution Approach 1:
The circuit breaker is integrated into the attic space structure itself, merging the protective enclosure function with the existing structural space, eliminating the need for separate suspension and protection members while maintaining operational accessibility
2Device complexity
If the circuit breaker is located on the roof, then the structure is simplified, but the circuit breaker disturbs air flow during high-speed traveling and generates wind noise
Solution Approach 1:
The circuit breaker is relocated from the traditional horizontal roof surface to the vertical attic space between the roof and ceiling, changing the spatial dimension and allowing the breaker to be positioned away from direct airflow paths while maintaining structural integration
3Ease of operation
If the circuit breaker is located at an outside of the car body, then access is simplified, but the appearance of the car is impaired
Solution Approach 1:
The circuit breaker is nested within the attic space, which is an existing structural void between the roof and ceiling, allowing the breaker to be housed within the car body contours rather than protruding outward, thus preserving appearance while maintaining accessibility
Data Source
AI summary
A train set includes: an electric power bus line extending through cars; and circuit breaking equipment that is located in an attic space between a roof and ceiling of a car end portion of at least one middle car included in the cars and interrupts a current flowing through the electric power bus line. The circuit breaking equipment includes: a first connector that is electrically connected to the electric power bus line located at the middle car and includes a first electric power terminal; a second connector that is electrically connected to the electric power bus line located at a car adjacent to the middle car among the cars and includes a second electric power terminal; and a circuit breaker located between the first electric power terminal and the second electric power terminal.