| 摘要 |
PROBLEM TO BE SOLVED: To prevent the short-circuiting between electrodes due to a short- circuit current and a conductive gas and, at the same time, to prevent the imperfect contact between a PTC thermistor element and electrodes due to the thinning of the thermistor element by the short-circuit current. SOLUTION: In a current limiting device provided with a PTC thermistor element 1, a pair of electrodes 2 and 3 which are respectively brought into contact with the two parallel flat surfaces of the element 1, and a pair of pressing members 4 and 5 which always press the electrodes 2 and 3 against the element 1 with prescribed pressures, an insulating frame 10 which is made of an elastic insulating material and arranged in such a way that the frame 10 covers the end faces of the element 1 and is held between the pressing members 4 and 5 is provided. In addition, exhaust openings respectively communicated with the upper and lower surfaces of the element 1 are formed in different directions through the frame 10.
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