Both ends of the movable contacts fuseholder fuse depend

Both ends of fuse tube fuse rely on the moving contact (melt) fastened to the moving contact pushed "duckbill" rear projection, made ​​of phosphor bronze tablets on the upper movable contact against static contact head, and therefore the fuse tube firmly stuck in the "duckbill" inside. When the short mcb circuit breaker through the fuse is blown, arcing, fuse tube lined with a steel sheet under the action of the arc tube produce power transformers of gas because of the fuse tube top is sealed, the gas ejected downward side, blowing out the arc. Because the fuse blows, the upper and Circuit breaker contact fuse tube fuse fastened to lose power, the fuse tube own gravity and the upper and lower static contact under the action of spring, fuse tube drop rapidly, so that the circuit is disconnected , removal of equipment failure or malfunction section of line.