FIBER OPTICAL ELECTRIC ARC SENSOR Russian patent published in 2022 - IPC H02H7/22 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to a system for protecting cabinets of complete switchgears (CSG) and other electrical equipment from the effects of an electric arc. Fiber-optic electric arc sensor, consisting of a receiving head, a two-fiber cable with two polymer optical fibers, in which the main element is a sensitive element consisting of a two-fiber cable made of polymer optical fiber, placed in the receiving head of the sensor so that the ends of the polymer optical fibers are several protrude from the opposite end of the head body, then the ends of the fibers are soldered, as a result, a spherical or ellipsoidal junction is formed, which provides the maximum angle of capture of the arc radiation, when an arc occurs, the radiation hits the spherical or ellipsoidal junction, then through one of the polymer optical fibers of the cable it enters the photodetector of the arc recording unit, the corresponding CSG cell is switched off, or other monitored equipment, the second polymer optical fiber is connected to the emitter of the test signal of the registration unit and provides control of the integrity of the polymer optical fiber of the cable.

EFFECT: invention provides for the creation of a point fiber-optic element of the electric arc and spark sensor based on polymer optical fiber, providing high reliability, wide viewing angle, increased speed, control of the integrity of the optical fiber of the cable.

2 cl, 2 dwg