Analog Digital 16Amp Voltage Regulator for Parallel Operation 16Amp analog digital AVR that can be used in parallel operation of Generator Sets. It's compatible with Caterpillar, SIEMENS, Khenkikian, Genaust, KATO, Marelli, BOKUK, ENGGA, Crompton Greaves AVRs. Employing a digital circuit for voltage sensing and under frequency protection, it can effectively minimize the output voltage variations and under frequency knee point drifted affected by the changes of environment temperature.