Hi, I need help to understand these statements: The generators at the power plant can be operated as either, constant voltage source (CVS), or constant current source (CCS). To obtain a CVS, you spin the generator at constant speed. To obtain a CCS, you spin at constant torque. The CVS is used exclusively in power distribution because losses are lower. Conductors lose more power than insulators, so they generate at 100% voltage all the time, & the current varies with load, & it is usually well below 100% capacity. Can you help me explain the bold part? I don't understand why insulator losses are taken into acount. Where does these losses come from? With conductor losses, I think it is caused by resistance of the conductor but I am totally lost about insulator loss.