Patents Assigned to Sta-Con, Inc.
  • Three-phase monitor circuitry
    Patent number: 4823227
    Abstract: Solid state circuitry designed to protect three phase electrical equipment operating from two hundred forty (240) to four hundred eighty (480) volt power from loss of any phase, phase reversal, or under voltage or over voltage of the power supply. The circuitry is designed so that if phasing and voltage are correct, then the device will energize an output relay thus enabling the load to operate the protected equipment. This circuitry accomplishes all of the above with much lower power dissipation than other monitoring devices.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: April 18, 1989
    Assignee: Sta-Con, Inc.
    Inventor: James E. Grant