| 摘要 |
A power protection apparatus including: a switch unit 4 connected in series in a power supply line from a power source 2 to a DC regulator 3; a first short-circuit detector 5 for detecting a short circuit based on an output voltage value of the DC regulator 3 obtained by making the switch unit 4 conductive for predetermined time and, after that, interrupting the switch unit 4; a second short-circuit detector 7 for detecting a short circuit based on a value of current flowed in the switch unit 4 when the switch unit 4 is conductive; and a switch interrupting unit 8, when a short circuit is detected by the second short-circuit detector 7, for forcedly interrupting the switch unit 4 regardless of a state of the switch unit 4 controlled by the first short-circuit detector 5.
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