| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a burnout accident on an electrical path with a switch connected by protecting the switch and devices on the electrical path with the switch connected against arcing and overheating. <P>SOLUTION: The switch having a power supply side terminal connected with a DC power supply and a load side terminal for outputting power from the DC power supply includes: a contact inserted in an electrical path connecting the power supply side terminal and the load side terminal to make or break the electrical path between the DC power supply and the load; a first substrate mounted with an arc detection circuit for detecting an arc discharge via the electrical path; a trip unit for breaking the contact when the arc detection circuit detects an arc discharge; a second substrate mounted with a power circuit connected between the contact and the load side terminal to generate operating power for the arc detection circuit and the trip unit from the DC power supply; and a case having the power supply side terminal and the load side terminal situated on a surface and housing the trip unit, the first substrate, the second substrate and the electrical path. The first substrate is situated under a case surface position different from the case surface positions with the power supply side terminal and the load side terminal situated. <P>COPYRIGHT: (C)2012,JPO&INPIT |
