the three ON/OFF switches enable or disable the three functions. Thefunctions can be enabled in any combination. With the open-phase function, the H/L switch sets the current unbalance factor. When set to H", the motor circuit operates at 35% of the current unbalance factor for operation. When set to L" , the motor circuit operates at 65% min. of the current unbalance factor for operation. With the over-current function, the *4/*1 switch sets the time changeover value for the start-up mode. When set to *4" , the operating time range is 4 to 40 s. When set to *1", the operating time is 1 to 10 s.