| 摘要 |
PROBLEM TO BE SOLVED: To position a wire carrying current, even when the current is smaller than rated in the main breaker or the current limiter. SOLUTION: A current monitor 1 is built in a single-phase three-wire distribution board, with a plurality of branch breakers being connected to the main leakage current breaker secondary. This current monitor 1 has a current detector for the current in the main leakage current breaker secondary, consisting of a pair of current transformers 11a and others, a rated current setting section with a rotary knob 13a for the current limiter and the main leakage current breaker, and a control section to output the duty ratio signal through the data output for each range of currents, after dividing the current into plural ranges from 0% exceeding 100% of the rated current. Further, it has an indicator section, consisting of LEDs arranged under an indicator window 14a, to show that the actual current percentage with respect to the rated current set by the rated current setting section. |
