Nuclear power plant excitation regulator power supply output circuit

The invention belongs to the technical field of generator excitation and voltage regulation systems, and provides a nuclear power plant excitation regulator power supply output circuit which comprisesa power supply circuit, a first switching circuit, a second switching circuit, a first control power supply assembly and a first excitation switch control assembly. The nuclear power plant excitationregulator power supply output circuit is provided with the first switching circuit and the second switching circuit, so that power supply loops of the first control power supply assembly and the first excitation switch control assembly can be mutually and independently controlled; therefore, the first working power supply for supplying power to the excitation regulator and the power supply for supplying power to the opening and closing of the excitation switch can be independently controlled, and the protection power supply loop is prevented from being disconnected when the loop of the control power supply of the exci