| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which can shut down an excessive current quickly and automatically by detecting the supply of the excessive voltage to AC power source lines at the fastest timing, only requiring the addition of the minimum necessary parts. SOLUTION: A power source part outputs an AC 24V via internal circuits and the internal circuits have a burnout fuse Fu1 which non-reversibly shuts down the AC power source lines Lac1 and Lac2 when the current value at input terminals of the AC power source lines for transmitting AC voltages exceeds the upper limit value, AC shutdown parts 48 which are arrayed in branch lines separated off the AC power source lines and non-reversibly shut down the branch lines when the voltage value of the AC power source lines exceeds the limit value and the third shutdown parts 49-51 which are arrayed on the upstream side of the AC shutdown parts 48 and reversibly shut down the ground line of the power source part when the voltage value of the AC power source lines exceeds the specified value. COPYRIGHT: (C)2009,JPO&INPIT
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