AC ripple meter

Details AC ripple meter AC ripple meter

1990-09-05

1992-06-02

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340645, 324119, 324140D, G08B 2100

Patent

active

051190737

ABSTRACT:
An apparatus and method are disclosed for measuring and displaying the percentage of ac voltage ripple present on a direct current input voltage. In addition, the apparatus can be set to activate alarms and trip relays when the percentage of ac voltage ripple meets or exceeds a preset value.

REFERENCES:
patent: 3168693 (1965-02-01), Eckenfelder
patent: 3210603 (1965-10-01), Calfee et al.
patent: 3629704 (1971-12-01), Stevens
patent: 4147610 (1979-04-01), Larson
patent: 4240881 (1980-12-01), Stanya
patent: 4242674 (1980-12-01), Wheeler
patent: 4520310 (1985-05-01), Kelley et al.
patent: 4694193 (1987-09-01), Schlenk et al.

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