| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-reliability and inexpensive overcurrent protective device, using a simple configuration. <P>SOLUTION: The overcurrent protective device includes a plurality of power supplies 2a, 2b, and 2c, which are distributed from an input power supply and connected to the input power supply in parallel while respectively having a feed line to a load, a cutoff circuit 1 connected between the input power supply and the plurality of power supplies, each detection resistor 4a, 4b and 4c, respectively connected to each feed line of the plurality of power supplies so as to detect an output current of each power supply, an adder circuit 6z, which adds the output current of each power supply, detected by each detection resistor, via each correction resistor 6a, 6b and 6c; and a comparator circuit 5 that compares the output currents added by the adder circuit with a preset reference value 7. When the added output currents exceed the reference value, the comparator circuit transmits a cutoff signal to the cutoff circuit. <P>COPYRIGHT: (C)2010,JPO&INPIT |
