| 摘要 |
PURPOSE:To certainly prevent burning of a stabilizer by holding a thermo-element in vacuum. CONSTITUTION:In normal state, the auxiliary discharge generated between a main electrode 3a and an auxiliary electrode 10 allows a bimetal 6a to operate, and the translation to main discharge between the main electrodes 3a and 3b is performed. The contact between the movable contact 15 and the fixed contact rod 14 of the bimetal 6b is released after translation to main discharge. If the movable contact 15' of the bimetal 6a and a contact lead 21 are fused, the bimetal 6b operates, and the contact between the movable contact 16 and the fixed contact terminal 14 is released, and the contact lead 21, filament 7, bimetal 6b, or filament fixing rod 22 or 5a is fused, and then current stops, and burning of stabilizer can be prevented. The bimetal 6b is held in vacuum of 10<-1> Torr or less. |
