| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: In a conventional distributing board for low voltage, illumination is often off when a main breaker trips, which often troubles maintenance workers for recovery work. <P>SOLUTION: The distributing board 1 for low voltage includes two main breakers 2A, 2B connected to power supply side and many branch breakers 3A-3G connected to load side. Between the main breakers 2A, 2B and the branch breakers 3A-3G, there is disposed a switching electromagnetic contactor 4 that switches, when one of the two main breakers trips, to the other main breaker. <P>COPYRIGHT: (C)2013,JPO&INPIT |
