公开(公告)号：US3560899A

公开(公告)日：1971-02-02

申请号：US3560899D

申请日：1968-11-18

Applicant: SQUARE D CO

Inventor： CHABOT FERDINAND E

IPC: H01H71/24 ,  H01H71/74 ,  H01H77/02

CPC classification number: H01H71/2409 ,  H01H71/7409

Abstract: THIS CIRCUIT BREAKER IS A MOLED CASE, MULTI-POLE CIRCUIT BREAKER OF WHICH EACH POLE HAS ITS INDIVIDUAL TOGGLE MECHANISM FOR CLOSURE AND RELEASE. THESE MECHANISMS ARE OPERABLE BY A COMMON OPERATING HANDLE SO AS TO CAUSE ALL OF THE POLES TO CLOSE SIMULTANEOUSLY. EACH TOGGLE MECHANISM IS SPRING BIASED IN THE OPENING DIRECTION, BUT IS LATCHED IN POLE CLOSING POSITION BY A HIGH MAGNETIC RELEASE WHICH RELEASES INSTANTANEOUSLY IN EVENT OF A HIGH CURRENT SHORT CIRCUIT, BY A LOW MAGNETIC RELEASE WHICH RELEASES AT THE END OF A SLIGHTLY LONGER INTERVAL, SUCH AS IN EVENT OF A TEMPORARY HEAVY OVERLOAD, AND BY A THERMAL RELEASE WHICH RELEASES AT THE END OF A SOMEWHAT LONGER INTERVAL DUE TO THERMAL EFFECTS CREATED BY LONGER SUSTAINED, BUT LESSER, OVERLOADS. THE HIGH MAGNETIC RELEASE OF EACH POLE OPERATES IN BYPASSING RELATION TO PARTS OF THE ASSOCIATED TOGGLE MECHANISM AND TO THE OTHER RELEASES FOR QUICKER RELEASING ACTION. THE LOW MAGNETIC RELEASE IS ADJUSTABLE FOR RELEASING IN RESPONSE TO PRESELECTED FLUX INTENSITIES. TRANSFORMERS SUPPLY SECONDARY CURRENT FOR OPERATING THE THERMAL RELEASES FOR THE POLES, RESPECTIVELY. THE AIR GAPS IN THE MAGNETIC FLUX PATH OF EACH TRANSFORMER CAN BE CHANGED READILY BY REMOVABLE RATING COLUMNS TO ASSURE SUBSTANTIALLY THE SAME SECONDARY CURRENT FOR ANY SELECTED PRIMARY CURRENT WITHIN THE RATED CAPACITY OF THE CIRCUIT BREAKER.

THE TERMINAL STRAP OF EACH POLE ACTS AS THE PRIMARY FOR CREATING THE OPERATING FLUXES. MEANS COMMON TO ALL OF THE POLE MECHANISMS ASSURE CONCURRENT RELEASE OF ALL TOGGLE MECHANISMS INSTANTLY UPON RELEASE OF ANY ONE OF THEM. SPECIFIC SAFELY FEATURES ARE ALSO PRESENT.

公开(公告)号：US3706056A

公开(公告)日：1972-12-12

申请号：US3706056D

申请日：1971-08-09

Applicant: SQUARE D CO

Inventor： CHABOT FERDINAND E

IPC: H01H71/10 ,  H01H73/48

CPC classification number: H01H71/1045 ,  H01H2071/1036

Abstract: A FOUR-POLE CIRCUIT BREAKER HAVING TWO LINE TERMINALS AND TWO LOAD TERMINALS, EACH TERMINAL SERVING TWO POLES ELECTRICALLY CONNECTED IN PARALLEL. THE MOVABLE CONTACT ARMS OF EACH PAIR OF PARALLEL POLES ARE CONNECTED TO A SINGLE THERMAL AND MAGNETIC TRIPPING DEVICE IN ONE POLE SPACE, THE OTHER POLE SPACE HAVING NO TRIPPING DEVICE BUT BEING PROVIDED WITH A LATCH WHICH ALSO SERVES AS A TRIP

INDICATOR FOR THE CIRCUIT BREAKER WHEN THE POLE SPACE IS PROVIDED WITH A WINDOW.