... as large stores, guesthouses, stations, commercial net points, laboratories, factories and enterprises, used in AC 50 - 60Hz, below 415V illuminating ... power controlling circuit as over current, overload and short circuit protection and frequency switch under the rated working state. 1 line, 2 lines ... lines, 8 lines, 12 lines, 15lines,18 lines, 24 lines and 36 lines are available. distribution box