Cable Side Disconnecting Switch for Gas Insulated Cabinets
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Solution Overview
Problem
In gas insulation switch cabinets, when a disconnecting switch is only located on the busbar side, cutting off the power supply can be inconvenient due to the superior power supply unit being far away, leading to potential safety hazards from incorrect power closure during fault handling.
Innovation Solution
A gas insulation switch cabinet design with a cable side disconnecting switch between the cable and breaker chambers, allowing for electrical isolation on the incoming side, thereby enabling power supply cutoff without requiring disconnection of the distant superior power supply unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a disconnecting switch is only located on the busbar side, then the device complexity is reduced, but the ease of operation deteriorates due to inconvenient power supply cutoff
Solution Approach 1:
The patent divides the disconnecting function into two separate disconnecting switches: one located on the busbar side and another on the cable side. This segmentation allows independent control and isolation at different locations, improving operational convenience for power supply cutoff without requiring a single complex switch mechanism.
2Reliability
If a disconnecting switch is only located on the busbar side, then the device complexity is reduced, but the reliability deteriorates due to safety hazards from incorrect power closure
Solution Approach 1:
By placing disconnecting switches at both the busbar side and cable side, the system creates distinct isolation zones. This segmentation enables reliable fault containment and prevents incorrect power closure by providing clear visual and operational indicators of isolation status at multiple points, enhancing safety during fault handling.
Solution Approach 2:
The cable side disconnecting switch acts as an intermediary element between the cable chamber and the breaker chamber. This intermediate disconnecting point provides an additional layer of safety control, allowing operators to verify isolation status before proceeding with fault handling, thereby reducing reliability risks.
3Loss of time
If the superior power supply unit is far away, then the adaptability to different installation scenarios is improved, but the loss of time increases during power supply cutoff operations
Solution Approach 1:
The cable side disconnecting switch is positioned at the cable chamber, which is the point of entry for power supply. This preliminary placement of the disconnecting switch at the source allows immediate isolation of power supply without requiring travel to distant superior power supply units, significantly reducing the time for power supply cutoff operations.
Data Source
AI summary
A gas insulation switch cabinet and a switch device are provided. The gas insulation switch cabinet includes: a cabinet body; and a cable chamber, a breaker chamber and a busbar chamber which are in the cabinet body and configured that a current sequentially flows through the cable chamber, the breaker chamber and the busbar chamber. The gas insulation switch cabinet further includes a cable side disconnecting switch between the cable chamber and the breaker chamber in a flowing direction of the current.