This model demonstrates the correct behaviour of a tap-changer logic of type INTERVAL by directly prescribing the moniitoring conditions valueUnderMin, valueAboveMax. The logic starts with tap changer in position 5.

The monitored value U is a sine wave and does not depend from the tap position. The monitoring INTERVAL is [-0.5, 0.5].

The Locked signal is active in t = [0, 20] interval.

The tap position stays frozen until t=20, because the locked signal is active.

After the Locked signal disappears, the tap position starts to move according to the defined time lag intervals (3 second for first tap, 2 second for subsequent taps) and to the actual value of U (tap position increases when U is higher than 0.5, and decreases when U is lower than -0.5).

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