Grade-level enclosure for electrical apparatus

Details Grade-level enclosure for electrical apparatus Grade-level enclosure for electrical apparatus

1975-05-14

1977-01-25

Askin, Laramie E.

Electricity: conductors and insulators

Underground

52 20, 70229, 70DIG57, 174 16R, 220 18, 292251, H02G 910, E02D 2914, E04H 506

Patent

active

040052532

ABSTRACT:
A grade-level enclosure for transformers and other electrical apparatus used in utility electric distribution systems, comprising a hollow, open-ended concrete box adapted to be partially embedded in the ground and to extend above ground level, and an open-bottomed cover for the box, whereby to complete the enclosure for the electrical apparatus, special provisions being made for supporting the apparatus in the enclosure, ventilating the enclosure interior efficiently, but preventing the insertion of foreign objects through the ventilation openings, and rendering access for installation, maintenance and servicing of the equipment easy and convenient, while at the same time providing a high degree of security against tampering or entry by unauthorized persons, and a high degree of safety against electrical shock or other injury.

REFERENCES:
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patent: 2717275 (1955-09-01), Hayden et al.
patent: 3162718 (1964-12-01), Gunthel, Jr.
patent: 3263378 (1966-08-01), Dorris
patent: 3279838 (1966-10-01), Hamilton
patent: 3360752 (1967-12-01), Uptegraff, Jr.
patent: 3464580 (1969-09-01), Jones
patent: 3587908 (1971-06-01), Nickel
patent: 3728464 (1973-04-01), Griffing
patent: 3760234 (1973-09-01), Jones et al.
patent: 3784727 (1974-01-01), Haubein

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