A card formula tool to lock for miniature circuit breaker of nuclear power plant

The utility model provides a card formula tool to lock for miniature circuit breaker of nuclear power plant, includes tool to lock casing, two U font snak links, two -layer double -layered chamber about the tool to lock casing is formed with, but the straight -bar section endwise slip of first U font snak link ground press from both sides in the upper strata presss from both sides the chamber, but the straight -bar section endwise slip of second U font snak link ground presss from both sides in lower floor clamp chamber, the opening orientation of two U font snak links is opposite, and the crotch section of two U font snak links is located the front and back both sides of tool to lock casing respectively, every layer of double -layered chamber still is equipped with the end plate in the one end near corresponding U font snak link crotch section, and the horizontal span of two crotch sections of first U font snak link and the miniature circuit breaker that card hole horizontal spacing is 18mm match, the horizontal span of two crotch sections of a second U font snak link and the miniature circuit breaker matching that card hole horizontal spacing is 27mm. The utility model discloses the structure is ingenious, and is easy and simple to handle, and is fit for being applied to the miniature circuit breaker of two kinds of specifications simultaneously.