DEVICE FOR CONTROL OVER POWER TRIACS Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: with connection of device to A. C. network current passing through first capacitor 3, ballast element 4 and stabilizer diodes 6 and 7 unblanks power triac 1 for time determined by time constant of time setting capacitor 9. Timer 8 operates after charging of capacitor. To return device into initial state controlling key element 15 closes. Due to it time setting capacitor and second capacitor discharge through diodes 11, 12 and one arm of diode bridge 5. EFFECT: improved operational characteristics. 1 dwg