The phase shifter I ensures that the current on a line remains
lower than a predefined threshold called valueMax. When the current
monitored goes above IMax, the phase-shifter will act to modify its
tap to bring back the current in an acceptable range.
The time interval before the first time change is specified
with a first timer and a second timer indicates the time interval
between further changes. The automaton can be locked by an external
controller: in this case, it stops acting.
The detailed phase-shifter I behavior is explained in the
following state diagram:
.Dynawo.Electrical.Controls.Transformers.PhaseShifterI