Through fault pressure filter for fault pressure relay

Details Through fault pressure filter for fault pressure relay Through fault pressure filter for fault pressure relay

1977-12-09

1982-07-13

Footland, Lenard A.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

F16D 102

Patent

active

043389694

ABSTRACT:
Methods and apparatus are provided for attenuating through-fault pressure disturbances in fault relays for a liquid-filled transformer. The method comprises the interposition of a mechanical filter between the transformer and the relay for attenuating through fault pressure variations while passing internal pressure faults. The filter consists of a pressure attenuation passage having an optimum length to diameter ratio for attenuating higher frequency pressure oscillations in excess of 50 Hz.

REFERENCES:
patent: 2653801 (1953-09-01), Fontein et al.
patent: 2803962 (1957-08-01), West
patent: 3109459 (1963-11-01), Lee
patent: 3212521 (1965-10-01), Jean
patent: 3537482 (1970-11-01), Rudewick
patent: 3702144 (1972-11-01), Loveland
patent: 3999714 (1976-12-01), Lang

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