5.2. Droop setting for parallel operation during on load operation
5.2.1. HFx5 series generator:
Adjust the load current to about 30% of rated value and reconnect the opened circuits such as cable nos. 17, 18, 19 for sensing and 1, 5 for by-pass to A1. Adjust the load current to the rated value, and then adjust the output voltage to 94%(6% voltage droop) of rated value by increasing the tandem potentiometer(R2) for reactive current compensation.
5.2.2. HFx6 series generator:
Adjust the load current to about 30% of rated value and reconnect the opened circuits such as connectors X1 for sensing and X3 for by-pass to A1. Adjust the load current to the rated value, and then adjust the output voltage to 94%(6% voltage droop) of rated value by increasing the tandem potentiometer(S) on A1 for reactive current compensation.
5.2.3. If the rated load current cannot be loaded due to the low supply power, the droop should be set to the lower value proportional to the possible load comparing to rated load.( 6[%] droop at 100[%] rated current)
(ex.) rated current = 2000 [A], rated voltage = 450 [V], possible load current = 1600 [A]
Droop setting value [%] = 6[%] * (1600 / 2000) = 4.8[%], output voltage = (1 - 0.048) * 450 = 428.4 [V]
5.2.4. The load current decreases when the voltage decreases due to voltage droop by adjusting the tandem potentiometer(R2 for HF5 series, S for HF6 series) for reactive current compensation, so the load current should be kept at the rated value by controlling the exciting current of power supply generator during droop setting. But the set value of reference value setter during no-load operation should be kept unchanged.
5.2.5. After finishing droop setting successfully, record Ua, Ja, Uef, Jef on the ‘AVR setting sheet’.