189results about How to "Quick limit" patented technology

Disclosed is provided a hybrid-type superconducting fault current limiter for rapidly limiting a fault current, the fault current limiter having a first circuit and a second circuit which are connected in parallel with each other, wherein the first circuit includes a superconductor and a circuit breaker which are connected in series with each other, and wherein the second circuit includes a driver having a driving coil and an electromagnetic repeller, a short contact connected in parallel with the driver, and a current limiting unit connected in series with a third circuit including the driver and the short contact. The hybrid-type superconducting fault current limiter comprises a power semiconductor element switch connected in series with the first circuit, the power semiconductor element switch normally maintaining an ON state and being activated and changed into an OFF state by a fault sensing signal generated according to an inflow of the fault current.

The invention relates to a prefabricated wall body installing structure which comprises a connecting head and a connecting seat, wherein the connecting head is detachably connected onto the bottom endof a prefabricated wallboard; the connecting seat is fixed on a floorboard; the connecting head comprises a support plate parallel to the bottom surface of the prefabricated wallboard; a positioningplate is fixed at the upper end surface, positioned at one side of the prefabricated wallboard, of the support plate in a protruding way; the connecting seat is fixedly provided with a first positionlimiting plate in abut joint with the upper end surface of the positioning plate; the connecting seat is also elastically hinged to a second position limiting plate for tightly pressing the side, faraway from the positioning plate, of the support plate; and the connecting seat and the connecting head are embedded in a sink groove pre-formed in the floorboard. Through such arrangement, when the prefabricated wallboard is installed and connected with the connecting seat, the positioning plate turns to a position under the first position limiting plate; meanwhile, the side, far away from the positioning plate, of the support plate extrudes and turns to a position under the second position limiting plate, so that the positioning plate is tightly pressed through the first position limiting plate; and meanwhile, the second position limiting plate elastically resets to a state of tightly pressing the side, far away from the positioning plate, of the support plate, so that the goal of greatlyshortening the construction period is achieved.