ADAPTIVE STARTING ELEMENT Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: adaptive starting element is intended for relay protection and automatic equipment of electric systems. It includes adaptive filter 1 with master unit 2 and threshold element 4. Element is supplemented with additional elements which are so connected with principle ones that adaptive starting element formed by their combination acquires capability to distinguish new mode from preceding one even if the latter was transient mode with optional steady-state and free components. Additional elements include second threshold element 5, time element 7, univibrator 9, differentiating element 11, two logic NOT gates 6, 8 and logic AND gate 10. EFFECT: enhanced sensitivity both to steady-state and transient processes. 2 dwg