Control apparatus or system for purged and pressurized enclosure

Details Control apparatus or system for purged and pressurized enclosure Control apparatus or system for purged and pressurized enclosure

1990-05-14

1992-04-07

Joyce, Harold

Ventilation

Having both inlet and outlet airways

Pressure regulation

454239, 454359, 454184, F24F 7007, F24F 1100

Patent

active

051017105

ABSTRACT:
A control apparatus or system for purged and pressurized electrical equipment provides rapid, controlled exchange of pressurizing or purging gas to an electrical enclosure. The control system or apparatus for NFPA Type Y and Type Z electrical equipment enclosures has a source of pressurizing gas, a rapid exchange pressure control filter/regulator, rapid exchange pressure gauge, vent control valve and a manual inlet valve providing for rapid exchange of purging gas to the electrical enclosure during start up, an enclosure control valve, enclosure pressure indicator, a venturi providing controlled leakage from the system, and a pressure loss control alarm or switch. Another embodiment of the control system or apparatus for NFPA Type X electrical equipment enclosures has a rapid exchange pressure control filter/regulator, rapid exchange pressure gauge, vent control valve and an automatic inlet valve providing for rapid exchange of purging gas to the electrical enclosure during start up, and enclosure control valve, enclosure pressure indicator, a venturi providing controlled leakage from the system, and a pressure loss control alarm or switch.

REFERENCES:
patent: 3016813 (1962-01-01), Frasier et al.
patent: 3210547 (1965-10-01), Eliot
patent: 4720044 (1988-01-01), Stemwedel, Jr.

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