3ADT220090R0006 SDCS-PIN-51-COAT Measurement Card PIN51

UN 6000 3ADT220090R0006 SDCS-PIN51 Measurement Card PIN51
According to the different power supply methods of the excitation winding, it can be divided into two types: self-excited and separately-excited. In a self-excited DC exciter excitation system, the generator rotor winding is powered by a dedicated DC exciter. In the separately excited DC exciter excitation system, the excitation winding of the separately excited DC exciter is powered by the auxiliary exciter, which is commonly referred to as “three-machine excitation”. As the capacity of the generator increases, the required excitation current also increases accordingly. The excitation power unit of the large-capacity unit uses an AC exciter excitation system composed of an alternator and a semiconductor rectifier element. AC exciter excitation system can be divided into separately excited AC exciter system and self-excited AC exciter excitation system according to the rectification mode and rectification state of the exciter power supply.