| 摘要 |
PURPOSE: To realize a safety device and breaker by which a combustion appliance cannot be used even when a fuse terminal is short-circuited by a lead wire, etc., without using an internal fuse. CONSTITUTION: A safety device 1 is equipped with a temperature fuse F1, etc., a pair of fuse terminals T1, T2 to attach the temperature fuse F1, resistor RF, resistor terminal T3 to attach the resistor RF, relay Pi, etc., being connected to the fuse terminal T2, transistor Q1, etc., being serial with the relay Pi, etc., power source circuit 9 which applies a voltage to the relay P1 through the fuse terminals T1, T2 and transistor Q1, etc., and judgement circuit 4 which prohibits the transistor Q1, etc., from turning on when a resistance value of the resistor terminal T3 is different from the resistor RF. If a diode to prevent electric current from the terminal T2 to resistor RF from flowing is provided, the safety device 1 becomes more favorable. |
