Multi-functional hybrid contactor

A multi-functional hybrid contactor comprising:

• a detecting means for detecting each phase current supplied from an AC power source to an AC motor;
• a relay contact being installed between the AC power source and the AC motor and being able to be switched to an opened position or a closed position to supply or cut off a power from the AC power source to the AC motor;
• a relay for controlling switching of the relay contact;
• a starting mode selection switch means for selectively starting the AC motor in a direct starting mode or a soft starting mode;
• a semiconductor switch means being connected in parallel to the relay contact, consuming an arc current due to a chattering of the relay contact by closing for a predetermined time after switching to the closed position of the relay contact if the selection switch means is selected in a direct starting mode, and soft-starting the AC motor by turning on and off for a predetermined time before the relay contact is closed, if the selection switch means is selected in a soft-starting mode;
• a display means for displaying a normal state or an abnormal state of the electric current supplied to the AC motor;
• a display means for displaying a running state of the AC motor and/or an abnormal state of an AC current supplied to the AC motor;
• a setting means for setting a rated current, setting a delay time for neglecting an overcurrent during a predetermined time when the AC motor is directly started, and setting a starting time when the AC motor is soft-started;
• a run/stop switch means for selectively running and stopping the AC motor;
• and
• a controller being connected to the current detecting means, the relay, the relay contact, the selection switch means, the semiconductor switch means, the display means, the run/stop switch means and the setting means, so as to control the relay, the semiconductor switch means and the display means depending on the run or stop selection of the run/stop switch means, the detect current from the current detecting means and the set mode of the selection switch means.