Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Patent
1975-01-02
1976-08-17
Hohauser, Herman T.
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
52167, 188 1B, H01H 360
Patent
active
039756033
ABSTRACT:
A metal-enclosed switchgear characterized by a metal enclosure having a rear wall, opposite side walls, a bottom wall, and a front opening with a door therefor. A circuit breaker is removably located in the enclosure and comprises a plurality of arc chutes and an electrically insulating barrier wall on each side of and spaced from each arc chute. In addition, the metal enclosed switchgear comprises stabilizing means for increasing their natural frequency and preventing relative motion between adjacent components of the enclosure and the switchgear in response to ambient vibratory forces which means comprises first spacers of electrically insulating material in the spaces between each arc chute and each adjacent barrier wall, second spacers of electrically insulating material mounted on each opposite side wall and in the space between the side wall and the adjacent barrier wall. The metal enclosed switchgear also comprises first hold down means on the bottom wall near the rear wall and engageable with cooperating hold down means on the circuit breaker and engageable therewith when the circuit breaker is completely installed within the enclosure, second hold down members are likewise provided on the bottom wall and near the front openings and engageable with cooperating erasable means on the circuit breaker adjacent thereto. Moreover, the door comprises spaced stiffeners for increasing the frequency of door sections between the stiffeners in response to and at a frequency greater than that of seismic vibration.
REFERENCES:
patent: 2035143 (1936-03-01), Cavaglieri
patent: 2064791 (1936-12-01), Faber
Albert Willard S.
Colaiaco August P.
Hohauser Herman T.
Johns L. P.
Westinghouse Electric Corporation
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