ELECTRONIC TRIP DEVICE WITH SHORT DELAY FUNCTION

摘要

ELECTRONIC TRIP DEVICE WITH SHORT DELAY FUNCTION The short time delay circuit comprises a counter (4) which is zero reset when the signal (I) representative of the current is greater than or equal to a threshold (Is), and controls (A2) count-down of an up-down counter (5), when the content of the counter reaches a preset value. A clock circuit (6) controls the count-up and count-down frequency of the counter (4) and up-down counter (5). Refer to figure 1.