| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of interruption of a main switch 10 which occurs, if electric energy generated by a solar power generation system 4 decreases and power supplied from a commercial power system 8 increases when a total current larger than the interrupting current of the main switch 10 is supplied to loads 5, though such a situation can occur since power becomes suppliable from both the commercial system 8 and the solar system 4, when the solar system 4 generates power. SOLUTION: Current supplied to each load 5 is detected, and warning of possibility of interruption of the main switch 10 is given, when the detected total current exceeds a current value set on the basis of the interrupting current of the main switch 10. |
