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FIELD CURRENT LIMITER
The GRTD-TH3 is programmed to limit the generator drive current after a certain time. This time
allows the generator to respond to transients that require a high excitation current without affecting
the dynamics of the regulator. The limiter uses a PI controller. When the limit condition is reached,
the alarm will be reset.
td: Fall time until it reaches the current limit
The td can be higher or lower depending on the configuration of the PI control
➢ Excitation Overcurrent: 12,5 A
➢ Limit of excitation overcurrent: 10 A
➢ Overcurrent limit time: Obtained from the current curve.
➢ Signaling: Alarm Led constantly lit in Pink.
LOSS OF SENSING VOLTAGE
During initialization, when there is no sensing signal, the AVR acts by shutdown the excitation.
During operation, phase failure occurs when the sensing voltage signal is lost, so the actuation
maintains the last valid firing angle in the control regime without the condition of phase failure
Signaling: Alarm Led constantly lit in Green.
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