It is used for brush generator , from 64kw to 300kw.
Sensing Input.
Voltage:400VAC , 3 phase 3 wire
Frequency:50-60Hz
Exiciting voltage:20-130VDC
Partial current:20A
Regulation:+/-1% RMS with 4% engine governing
Voltage build-up: residual voltage at AVR terminal ?5VAC
External voltage regulation:+/-10% with 1k ohm 1 watt trimmer