Gas tube surge protector with interacting varistors

Details Gas tube surge protector with interacting varistors Gas tube surge protector with interacting varistors

H - Electricity

02

H

H02H 1/04 (2006.01) H01C 7/12 (2006.01) H01T 1/14 (2006.01) H01T 4/06 (2006.01)

Patent

CA 2239258

A surge protector is provided that has a gas tube and at least one MOV that is coordinated with the gas tube such that the MOV interacts with the gas tube lower the impulse breakdown voltage of a gas tube of a type that has a wide range of DC breakdown voltages across a population of the gas tubes. The gas tube is a generally cylindrical three element gas tube and the MOVs are disposed at opposite ends of the gas with fusible elements maintained in position by a clip. A population of the gas tubes has a range of breakdown voltages and the clamping voltage of the MOVs is set within this range such that the MOV will interact with any gas tube with a breakdown voltage in the population range to divert a surge to ground.

Protecteur contre les surtensions, comprenant un tube à gaz et au moins un MOV (varistor à oxyde de métal) qui lui est coordonné de façon qu'ils interagissent à une tension inférieure à la tension de rupture d'impulsion d'un type de tube à gaz caractérisé par une vaste gamme de tensions de ruptures c.c. En général, le tube à gaz est cylindrique et comporte à trois éléments. Les MOV sont disposés à ses extrémités opposées, les éléments fusibles étant assujettis par une pince. Les tubes à gaz de ce type ont une gamme de tensions de rupture et la tension de blocage des MOV est fixée à l'intérieur de cette gamme de sorte que le MOV interagisse avec tout tube à gaz dont la tension de rupture se situe dans cette gamme, afin de détourner les surtensions vers la terre.

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