Horn Spark Gap Lightning Arrestor Deion Chamber Arc Control
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Solution Overview
Problem
Existing horn spark gap lightning current arresters with deion chambers face challenges in achieving optimal mains follow current limitation while preventing high-energy lightning impulse currents from entering the deion chamber, leading to increased thermal and mechanical loads and reduced service life.
Innovation Solution
A horn spark gap lightning current arrester with a non-blowing design and controlled internal gas flow, featuring a narrow distance between electrode surfaces in the ignition area to fix pulsed current arcs and limit mains follow current arcs, using pressure reflections to minimize the force on lightning pulse current arcs and prevent their entry into the deion chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between electrode surfaces is reduced to improve mains follow current limitation, then the arc enters the deion chamber faster and mains follow current limitation is improved, but the thermal and mechanical load on the deion chamber increases due to high-energy lightning impulse currents
Solution Approach 1:
The spark gap is divided into two distinct functional zones: a first ignition area with narrow electrode spacing (0.5-2mm) for rapid arc initiation and mains follow current limitation, and a second arc area with larger spacing for handling lightning impulse currents. This segmentation allows each zone to be optimized for its specific function, preventing high-energy impulse arcs from immediately entering the deion chamber while maintaining effective mains follow current protection.
Solution Approach 2:
Different regions of the spark gap are given different geometric properties: the ignition area has parallel or slightly diverging electrode surfaces with small spacing to create strong electric fields for rapid breakdown, while the arc area has larger spacing to accommodate high-energy arcs. The deion chamber is positioned to receive arcs only from the first area under normal operating conditions, creating local quality differences that resolve the contradiction between fast response and thermal load.
2Temperature
If the distance between electrode surfaces is increased to reduce thermal load on the deion chamber, then the arc enters the deion chamber slower and thermal load is reduced, but mains follow current limitation becomes unacceptable
Solution Approach 1:
The spark gap is divided into two distinct functional zones: a first ignition area with narrow electrode spacing (0.5-2mm) for rapid arc initiation and mains follow current limitation, and a second arc area with larger spacing for handling lightning impulse currents. This segmentation allows each zone to be optimized for its specific function, preventing high-energy impulse arcs from immediately entering the deion chamber while maintaining effective mains follow current protection.
Solution Approach 2:
Different regions of the spark gap are given different geometric properties: the ignition area has parallel or slightly diverging electrode surfaces with small spacing to create strong electric fields for rapid breakdown, while the arc area has larger spacing to accommodate high-energy arcs. The deion chamber is positioned to receive arcs only from the first area under normal operating conditions, creating local quality differences that resolve the contradiction between fast response and thermal load.
3Reliability
If deion chambers are used to achieve sufficient current limitation and aging stability, then thermal and mechanical load handling is improved, but the device complexity and cost increase
Solution Approach 1:
The spark gap is divided into two distinct functional zones: a first ignition area with narrow electrode spacing (0.5-2mm) for rapid arc initiation and mains follow current limitation, and a second arc area with larger spacing for handling lightning impulse currents. This segmentation allows each zone to be optimized for its specific function, preventing high-energy impulse arcs from immediately entering the deion chamber while maintaining effective mains follow current protection.
Solution Approach 2:
The electrode geometry transitions from parallel or slightly diverging surfaces in the ignition area to a configuration suitable for the arc area. This dynamic geometric design allows the electric field distribution to change based on arc position and current magnitude, enabling the system to automatically adapt its behavior for different operating conditions without requiring complex control mechanisms.
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 design reduces the load on the deion chamber from lightning surge currents, increases service life, and allows for a cost-effective, space-saving arrangement with reduced thermal and mechanical stress, effectively limiting mains follow current and preventing high-energy impulse currents from entering the deion chamber.
Implementation Method 1
using pressure reflections to minimize the force on lightning pulse current arcs and prevent their entry into the deion chamber
Implementation Method 2
controlled internal gas flow
Implementation Method 3
the pressure waves generated by the arc, which occurs during the lightning pulse current discharge in the ignition area of the spark gap, are reflected at flow obstacles in front of, on or behind the deion chamber in a defined manner
Implementation Method 4
the supporting forces of the arc movement increase with the current level in accordance with the Lorentz rule
Implementation Method 5
the spark horns of the electrodes arranged at a distance from one another forming an air breakdown spark gap
Implementation Method 6
which are designed to blow out, but in which the exiting gases are at least partially deionized
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The invention relates to a horn spark gap lightning arrestor with a deion chamber (6) for quenching arcs in a housing (1) and controlling the internal gas flow for adjusting a different response of the arc produced in the case of power pulse current loading, on the one hand, and of the arc induced by follow-on current, on the other hand. For this purpose, the distance between the opposite electrode faces of the horn spark gap in the striking region is kept very small and there is only a slight widening of the distance in the direction of the end of the horn spark gap in order to prevent undesired migration of the arc in the event of lightning pulse currents. Furthermore, gas circulation is provided such that the pressure wave produced by the lightning pulse current-induced arc is reflected by the deion chamber (6) and/or flow obstacles and counteracts the arc movement. A temporally delayed gas flow which passes through the deion chamber (6) is passed back at least partially to the striking region via deflection means and passed to flow openings provided in the electrodes in order to assist the arc movement (9) in the event of a follow-on current in the direction of the deion chamber (6), for which purpose the flow openings are located above the ignition region in the direction of the deion chamber (6).