Microgap type surge absorber

Details Microgap type surge absorber Microgap type surge absorber

H - Electricity

01

T

H01T 4/02 (2006.01) H01T 4/12 (2006.01)

Patent

CA 2056229

A microgap-type surge absorber comprises a columnar insulator element covered with a conductive material and provided with a microgap around the center thereof. A pair of conductive caps are fixed on both ends of the element, and first and second electrodes are attached to both caps. First and second glass tubes adhere to the periphery of the first and second electrodes, and surround the end parts of the element. A cylindrical third electrode is held between both glass tubes, and adjacently surrounds the element containing the microgap. The space defined by the first, second, and third electrodes and the glass tubes is charged with inert gas. When a glow discharge, started near the microgap, extends to the conductive coating and arrives at the caps, an arc discharge is formed between the caps through the third electrode. The third electrode protects the microgap from damage from arc-discharge current.

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