SEMICONDUCTOR DIODE CONDITION INDICATING DEVICE Russian patent published in 2004 - IPC

FIELD: power engineering; fault indicating devices for semiconductor diodes of high-voltage rectifiers. SUBSTANCE: device that functions to indicate abnormal situations in operation of semiconductor diode such as its breakdown Irrespective of whether high-voltage rectifier incorporating this diode is turned on or turned off has high-voltage diode, high-rating resistor with first fault indicating device in the form of light-emitting diodes, first low time constant RC circuit, second high time constant RC circuit in which capacitor is shorted out by high-rating resistor, and series-connected diode and second fault indicating storage device such as indicating relay inserted between R and C points of connection of first and second RC circuits. EFFECT: reduced time for locating and replacing faulty diodes; enhanced reliability of high-voltage rectifier. 1 cl, 4 dwg