ADAPTIVE CURRENT RELAY Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: adaptive current relay has capability of adaptation of operating characteristics τ = A₁/(I-B₁), where ε is time of operation; 1 is current in protected line; A₁ and B₁ are coefficients, and of return characteristic taking into account time of cooling of wires Δτ = A₂/(B₂-1), where Δτ is time of return of relay; A₂ and B₂ are coefficients taking into account ambient temperature. Such adaptation is ensured by temperature dependence of coefficients A₁, A₂, B₁, B₂. EFFECT: improved operational reliability. 3 cl, 3 dwg