UN 0807C-P Var.1 HIER 460271 R1 UNITROL

UN 0807C-P Var.1 HIER 460271 R1 does not set a special exciter in the excitation mode, and obtains excitation power from the generator itself, after rectification to supply the generator itself excitation, known as self-excited static excitation. Self-excited static excitation can be divided into two modes: self-shunt excitation and self-compound excitation. Self-shunt mode it through the rectifier transformer connected to the generator outlet excitation current, after the rectifier supply generator excitation, this excitation mode has the advantages of simple structure, less equipment, less investment and less maintenance work. In addition to rectifier and voltage change, the self-compound excitation mode is equipped with a high-power current transformer in series in the generator stator loop. The function of the transformer is to provide a larger excitation current to the generator in case of short circuit, so as to make up for the deficiency of the output of the rectifier transformer. This excitation mode has two kinds of excitation power supply, the voltage power supply obtained by the rectifier transformer and the current source obtained by the series transformer.

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