One-out-of-two conformation maintenance bypass device of reactor protection system

The invention discloses a one-out-of-two conformation maintenance bypass device of a reactor protection system. The one-out-of-two conformation maintenance bypass device comprises the reactor protection system and a 2/3 conformation logic bypass unit. The 2/3 conformation logic bypass unit comprises a rotary switch S with four gear contacts, and further comprises 12 relays, wherein the 12 relays are normally open relays, every four of the 12 relays form a set, the input ends of the input loops of the four relays in the first set are connected to the first-gear contact, the input ends of the input loops of the four relays in the second set are connected to the second-gear contact, and the input ends of the input loops of the four relays in the third set are connected to the third-gear contact. The bypass device is arranged between a safety monitoring device and a safety logic device, and the function of protecting the maintenance bypass is increased. On-line maintenance and tests of equipment are achieved, the probability of non-planned shut-down caused by equipment failures is reduced, the performability of the reactor is improved, and the productivity effect is guaranteed.