FIELD: physics, radio.
SUBSTANCE: invention concerns radiotechnics. The objective is achieved by adding analysis unit, parameter defining unit, memory unit, three shift registers, failure detection unit, state monitoring unit, three slave switches, second 'OR' element and connections between them to the prototype. Three-element majority protection includes first (1), second (2) and third (3) protection elements, first (4), second (5) and third (6) shift registers, first (7), second (8) and third (9) slave switches, first (10), second (11) and third (12) 'AND' elements, first (13) and second (14) 'OR' elements, analysis unit (15), parameter defining unit (16) memory unit (17), failure detection unit (18), state monitoring unit (19).
EFFECT: improved protection reliability due to protection failure control.
7 dwg
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