| 摘要 |
A case for a circuit breaker provides a base and a cover, both having an inner surface ribbing system and an inner surface coring system. The ribbing systems form an inner cavity retaining a circuit breaker mechanism and an outer aperture area for receiving a handle for manual operation of the mechanism. The handle is supported in the arcuate areas of the coring systems near the aperture area. A barrier member is located adjacent to the arcuate area in the base, and a barrier member is located adjacent to the arcuate area in the cover. When the base and the cover are assembled the two barrier members are spaced away from the handle and overlap the handle in the arcuate areas to separate the outer aperture area containing the handle from the inner cavity containing the circuit breaker mechanism and still allow the handle to extend freely down into the inner cavity for its connection to and operation of the circuit breaker mechanism. The width or thickness of the barrier member in the base is about 0.125 inches and that in the cover is about 0.156 inches.
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