Thanks for your imput guys. We are using Caterpillar VR3 regulators, they are all identical, we made sure, by upgrading them all, also they are connected in cross current compensation. Right now we have a 20% third harmonics at full load. The excitation voltage was verified bringing the unit to...
We have a this site with three Caterpillar Generators that parallel. Two of them are 350kw and one is 300kw. Problem started when the third unti(350kw) was added. It is different pitch. The original two units are 15/16 pitch and the new unit is 2/3 pitch. To aliviate the third harmonics currents...
