Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1988-07-07
1989-09-26
Broome, H.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337293, H01H 8504, H01H 8512
Patent
active
048703869
ABSTRACT:
A fuse for use in a high-voltage circuit which has a first fusible element through which most of a current in the fuse flows in a normal state of the fuse and which further breaks into two pieces when overcurrent flows therethrough and further has a second fusible element provided around the first fusible element and adapted to burn in response to the overcurrent for further melting to remaining pieces of the first fusible element in such a manner as to enlarge the distance between the remaining pieces of the first fusible element to an extent sufficient to prevent occurence of a surplus arc therebetween. Further, material of material the first fusible element has a smaller electrical resistance, a larger cross-sectional area and a lower melting point than that of the second fusible element.
REFERENCES:
patent: 3267238 (1966-08-01), Arikawa et al.
Broome H.
SOC Corporation
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