Patent ID: 6100807
Filing Date: 2000-08-08
Classification: G08B

Abstract:
A protection monitor for monitoring a plurality of conditions and for protecting equipment, said monitor comprising:a plurality of condition sensors, each of said condition sensors monitoring one of said plurality of conditions and including an elctromechanical contact in a first condition state when said monitored condition is abnormal and in a second condition state when said monitored condition is normal;a first alarm relay coil having first and second alarm states;a second alarm relay coil having first and second alarm states;a plurality of sensor coils, each of said sensor coils having a first or second sensor state responsive to said first and second condition state of one of said condition sensors and controlling the states of a plurality of electromechanical sensor contacts;an alarm control including some of said electromechanical sensor contacts and responsive to the condition state of each of said condition sensors for controlling the state of said first alarm relay coil and the state of said second alarm relay coil, said first alarm relay coil being in said first alarm state and said second relay coil being in said second alarm state when one of said sensor coils is in said first sensor state and said first alarm relay coil being in said first alarm state and said second relay coil being in said first second alarm state when at least two of said sensor coils are in said first sensor condition;an alarm circuit for activating alarms in response to the states of said first and second alarm relay coils; including an enclosure for housing said plurality of condition sensors, said first and second alarm circuits, said alarm control circuit, said enclosure having indicator lights thereon for indicating the states of said sensors to thereby indicate the state of each of said condition sensors, having visual and audible alarms initiated by said alarm control circuit in conjunction with said first and second alarm circuits, and a reset button for causing said alarm control circuit to reset said first and second alarm circuits when all of said condition sensors are not detecting an abnormal condition; andsaid enclosure having openings so that said condition sensors can detect said monitored conditions.