螢光放電燈用サーマル, スイツチの2, 3の特性について

抄録

In this report are described some charcteristics of the thermal switches, mainly of the hot wire type and, for reference, of the bimetal type.
Two kinds of the action time, which are opening time (to) and reclosing time (tc) of the filaments circuit of fluorescgnt Iamps, are obtained experimentally, and indicated as following equations
t₀=A logi²/i²-i₀²
t_c=B logi²/i₀²
Where i₀ is the critical current of operation, and i is the filament current.
In our experiments are obtained the relations between t₀, or t_c and i. The results are plotted in Fig. 5. which shows how t₀ decreases and t_c increases when the current i is increases.
t₀ and t_c are plotted in Fig. 10 and Fig. 7 respectively, and two constants, A and B are obtained by calculation. As the result, we know the range of constants of the hot wire type are following A=10-12sec B=5-7sec those constants of the bimetal type are much larger.