Vacuum switching tube for low-voltage and medium-voltage switche

Details Vacuum switching tube for low-voltage and medium-voltage switche Vacuum switching tube for low-voltage and medium-voltage switche

1993-03-31

1994-05-24

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3366

Patent

active

053150813

ABSTRACT:
A vacuum switching tube contains a switching chamber and a first contact piece fixed in place in it, as well as a movable current conducting rod with a second contact piece and a ring-shaped insulator. According to the present invention, the ring-shaped insulator has at least one end surface on the vacuum side, which is at least partially free of metallization, and which faces away from the metal vapor formed during switching and is therefore protected against condensation. It is advantageous if a gap with a pre-determined length and height is formed by the end surface of the insulator and by at least one adjacent metallic flange.

REFERENCES:
patent: 4446346 (1984-05-01), Kashimoto et al.
patent: 4546222 (1985-10-01), Watanabe et al.
patent: 4614850 (1986-09-01), Kuhl et al.
patent: 4672156 (1987-09-01), Basnett

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