Spark Gap Arrangement with Low-Impedance Insert
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Solution Overview
Problem
Existing spark gap arrangements for higher rated voltages require complex potential control and are costly, as simple series connections restrict protection levels and coordination, especially when dealing with triggerable spark gaps.
Innovation Solution
A spark gap arrangement featuring a series connection of a triggerable and a passive spark gap, where the passive spark gap has a low-impedance insert bridging the distance between main electrodes, allowing for load-dependent function division, and utilizing a pressure-resistant, flameproof enclosure with pressure equalization openings to manage arc voltage and current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple triggerable spark gaps are connected in series for higher rated voltages, then the protection level and coordination capability improve, but the device complexity and cost increase due to additional ignition circuits and potential control requirements
Solution Approach 1:
The patent divides the spark gap system into two distinct segments: one active (triggerable) spark gap and one passive spark gap. This segmentation allows the active gap to handle triggering and coordination functions while the passive gap simply provides voltage division and protection, eliminating the need for multiple ignition circuits and reducing overall system complexity.
Solution Approach 2:
The passive spark gap acts as an intermediary element between the active spark gap and the high voltage system. It mediates the voltage distribution and current flow, allowing the active spark gap to operate optimally without requiring complex control circuits for each gap in series.
2Reliability
If multiple triggerable spark gaps are connected in series, then the rated voltage handling capability improves, but the cost increases due to additional ignition circuits and control systems
Solution Approach 1:
By segmenting the spark gap functionality into active and passive roles, the patent eliminates the need for expensive ignition circuits and control systems for each spark gap. Only one triggerable spark gap is required, significantly reducing manufacturing costs while maintaining high rated voltage handling capability.
Solution Approach 2:
The passive spark gap uses simple, inexpensive components (electrodes and insulating material) without requiring expensive ignition circuits or control electronics. This approach prioritizes cost-effective design for the majority of the system while using sophisticated components only where absolutely necessary.
3Device complexity
If a simple series connection of spark gaps is used, then the device complexity is reduced, but the protection level and coordination capability are restricted
Solution Approach 1:
The patent applies segmentation by assigning different functional roles to different spark gaps: the active spark gap provides triggering and coordination control, while the passive spark gap provides voltage division and protection. This functional segmentation maintains simple overall system architecture while achieving high coordination capability through the specialized active gap.
Solution Approach 2:
The patent applies local quality by concentrating the intelligent control functions (triggering, coordination, response time control) in the local region of the active spark gap, while the passive spark gap region provides simple, reliable voltage division. This localized functionality achieves high coordination capability without requiring complex systems throughout the entire apparatus.
4Reliability
If the distance between main electrodes in passive spark gap is reduced, then the residual voltage is lowered, but the current density increases leading to thermal and dynamic loads
Solution Approach 1:
The patent applies local quality by using a low-impedance material specifically in the region where the electrodes are positioned, while maintaining the geometric dimensions that control current density. This localized material property change allows the system to achieve low residual voltage without proportionally increasing thermal and dynamic loads across the entire spark gap structure.
Solution Approach 2:
The patent changes the electrical parameter (impedance) of the material bridging the electrodes rather than changing the geometric parameters (distance, area). By using low-impedance material, the system achieves low residual voltage while maintaining electrode distances and geometries that limit current density and associated thermal/dynamic loads.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances follow current limitation, lightning current carrying capacity, and reduces thermal and dynamic loads on individual spark gaps, while saving space and costs by eliminating the need for additional ignition circuits, and allows for adjustable residual voltage and current density distribution.
Implementation Method 1
an insert is provided which bridges the distance between the main electrodes of the passive spark gap and consists of a low-impedance material. When subjected to a current load, this material behaves in a highly non-linear manner with regard to the residual voltage drop.
Implementation Method 2
spark gaps which are located in a flameproof enclosure and which have at least one pressure equalization opening
Implementation Method 3
The respective opposing main electrodes include a main electrode with a gas deflection channel
Data Source
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AI summary
The invention relates to a spark gap arrangement for higher rated voltages in which at least two opposite spark gaps comprising electrodes are serially connected and at least one of the spark gaps is introduced actively, i.e., may be triggered, for use as a network arrester that can conduct lightening currents. According to the invention, the spark gaps are located in a pressure-resistant capsule with at least one pressure compensation opening. Also, an insert that bridges the distance between the main electrodes of the passive spark gaps, consisting of a low-impendence material, is provided. Said low impendence material is extremely non-linear in relation to the decreasing residual voltage in the event of a current load.