Encapsulated, flameproof, not hermetically sealed, rotationally symmetrical high-performance spark gap

A technology of rotational symmetry and spark gap, which is applied to spark gaps with auxiliary trigger devices, spark gaps, overvoltage arresters using spark gaps, etc., can solve problems such as unsuitability for low-voltage power grids, improve mechanical characteristics, and increase combustion rate , the effect of high mechanical stability

Inactive Publication Date: 2008-05-28
DEHN SOHNE GMBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This spark gap is not suitable for use in low voltage grids

Method used

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  • Encapsulated, flameproof, not hermetically sealed, rotationally symmetrical high-performance spark gap
  • Encapsulated, flameproof, not hermetically sealed, rotationally symmetrical high-performance spark gap

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Embodiment Construction

[0046] In the spark gap according to FIG. 1 , the active part and the passive part are arranged inside the housing 1 .

[0047] Firstly, in order to form a pressure-resistant cooling chamber, an inner cup 14 is provided, which is surrounded by an outer cup 15 at intervals for maintaining the gas cooling channels 17 .

[0048] One of the main electrodes protrudes into the cavity interior of the cup 14 as the electrode of the hollow-cylindrical blow-out electrode 3 .

[0049] On the open side of the cup structure there is provided a support ring 12 which laterally surrounds the blow-off electrode 3 . The support ring 12 has an external thread corresponding to the internal thread on the outer cup 15 (see FIG. 2 ).

[0050] Lateral air outlet openings 16 are provided on the outer cup 15 , wherein at least the aforementioned gas cooling channels 17 are formed between the inner cup 14 and the outer cup 15 , and at the outer cup 15 Another slit-shaped gas cooling channel 18 is prov...

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Abstract

The invention relates to an encapsulated, flameproof, not hermetically sealed, rotationally symmetrical high-performance spark gap with two main electrodes spaced apart opposite each other, a metal outer housing, at least one trigger electrode, a gas or plasma cooling space, surrounded by the outer housing, and external electrical contacts for the main electrodes, preferably arranged on the end face. According to the invention, the cooling space comprises a coaxial arrangement of an inner cup and an outer cup, one of the main electrodes being formed as a hollow-cylindrical expulsion electrode and reaching into the inner cup. Also provided on the open side of the cup arrangement is a supporting ring, engaging laterally around the expulsion electrode. The supporting ring is connected to the outer cup in a flameproof manner, in particular with nonpositive and / or positive engagement. The outer cup of the coaxial arrangement has lateral gas outlet openings. Provided between the inner and outer cups there is at least one gas cooling duct. Between the outer wall of the outer cup and the inner wall of the outer housing there is a further, gap-like gas cooling duct. The gas cooling ducts themselves follow an altogether meandering path.

Description

technical field [0001] The invention relates to an encapsulated, pressure-resistant, non-hermetically sealed, rotationally symmetrical high-power spark gap according to the preamble of claim 1, comprising two spaced apart main electrodes, a metal housing, at least one The trigger electrode, a gas or plasma cooling chamber surrounded by the housing, and electrical connection contacts for the main electrode are preferably arranged on the end side. Background technique [0002] In the case of surge arresters based on spark gaps according to the prior art, the spark gaps are encapsulated in applications in the low-voltage area in order to avoid the environmentally hazardous blowing out of hot or still ionized gases. [0003] In blow-out arresters belonging to the earlier prior art, up to approximately 90% of the converted energy is mostly discharged into the environment in the form of hot gas. Obviously, both thermal and dynamic loads are increased for modern spark gaps due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T4/10H01T2/02
CPCH01T2/02H01T4/10
Inventor A·埃尔哈特S·希尔
Owner DEHN SOHNE GMBH CO KG
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