609U MANUAL STARTING SWITCH WITH UNDERVOLTAGE PROTECTION

Bulletin 609U has the same functionality as the standard Bulletin 609 Manual Starters except for the addition of undervoltage protection. These starters provide full line voltage starting, thermal overload protection, as well as undervoltage protection. Typical applications are on woodworking machinery, metal sawing machines, and many other machine tools where undervoltage protection is needed to meet safety standards. The undervoltage protection is accomplished by an electromechanical solenoid which is energized whenever line voltage is present. The solenoid is designed to mechanically open the starter contacts upon power failure, and keep them open even if power is returned to the unit. Only after the starter has been manually reset by pushing the operator to the stop position, can the starter be re-energized.

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