METHOD AND APPARATUS FOR FAULT-TESTING ELECTRICAL CIRCUIT SUB-SYSTEMS

摘要

Case 04-4142-U.S. APPLICATION OF JACK ELIAS AND ARTHUR M. OLSEN METHOD AND APPARATUS FOR FAULT-TESTING ELECTRICAL CIRCUIT SUB-SYSTEMS A method for fault-testing of electrical apparatus includes the steps of interrupting the application of control signals normally producing changes in the electrical apparatus, disconnecting electrical apparatus monitoring circuits from energizing signal means used to produce output signals from the electrical apparatus monitoring circuits dependent on the state of electrical apparatus, and checking the subsequent output of monitoring circuits to detect the output signal to detect output signals during the deenergized state indicative of a fault in the monitoring circuits. An apparatus for performing the aforesaid testing method includes a digital computer having a stored test control program therein for selectively addressing the power supply connection means of the monitoring equipment to produce a deenergization of the monitoring equipment and means for checking the output of the monitoring equipment after the deenergization thereof.