... output, three-phase imbalance protection; load over-current, overload, short circuit protection.. 2. Intelligent:After the traditional soft-start set the ... comfortable, noble, elegant.. 4. Design of circuit board:The general wiring of the main control board of the soft starter is the upper ... and lower levels, and the wiring of the main control board of SJR2 add to four. Therefore, it reduces the volume ...