公开(公告)号：US3566331A

公开(公告)日：1971-02-23

申请号：US3566331D

申请日：1968-10-21

Applicant: SQUARE D CO

Inventor： STANBECK HARRIS I ,  SLICER ALLAN E ,  JORGENSEN GEORGE N

IPC: H02G5/08 ,  H01R3/00 ,  H01R7/00 ,  H02G5/00

CPC classification number: H02G5/08

Abstract: A SECTION OF THE DUCT HAS A HOUSING OF RECTANGULAR CROSS SECTION CONTAINING A PLURALITY OF FLATWISE-STACKED POWER BUS BARS AND HAVING RECURRING ACCESS OPENINGS IN OPPOSITE SIDE WALLS EACH OF WHICH PERMITS EITHER A LOWER-CURRENT PLUGIN UNIT OR A HIGHER CURRENT TAP-OFF UNIT TO BE SELECTIVELY CONNECTED THERETHROUGH TO THE BUS BARS. HOOD AND DOOR ASSEMBLIES ARE PIVOTED ON THE HOUSING AT THE RESPECTIVE ACCESS OPENINGS AND EACH COVERS ITS ASSOCIATED ACCESS OPENING WHEN IN CLOSED POSITION. AN INSULATOR, SECURED TO THE INNER SIDE OF EACH HOOD, HAS A PLURALITY OF RELATIVELY SMALL OPENINGS PROVIDING ACCESS TO THE BUS BARS BY JAWS OF A LOW-CURRENT PLUG-IN UNIT WHEN THE DOOR IS OPEN. WHEN EACH ASSEMBLY IS IN ITS OPEN POSITION, THE INSULATOR SECURED TO THE HOOD THEREOF IS REMOVED FROM THE BUS BARS TO UNCOVER A RELATIVELY LARGE CONTACT AREA ON EACH BUS BAR. A GENERALLY RECTANGULAR MOUNTING FRAME MAY BE RELEASABLY ATTACHED TO THE HOUSING AT EACH OF SELECTED ONES OF THE ACCESS OPENINGS, AND A HIGH-CURRENT TRAP-OFF UNIT MAY BE REMOVABLY ATTACHED TO EACH MOUNTING FRAME. EACH TAP-OFF UNIT HAS A JOINT STRUCTURE WHICH, WHEN THE ASSOCIATED HOOD MEMBER IS IN ITS OPEN POSITON, CAN EXTEND THROUGH THE ASSOCIATED ACCESS OPENING AND INTERLEAVE WITH THE RELATIVELY LARGE CONTACT AREAS ON THE BUS BARS. JAWS OF GROUND BUS BAR CONNECTOR EXTEND THROUGH THE RESPECTIVE ACCESS OPENINGS FOR SELECTIVE ENGAGEMENT WITH A GROUNDING BLADE OF THE PLUG-IN AND TAP-OFF UNITS.