Voltage monitoring apparatus, as for monitoring cathodic protect

Details Voltage monitoring apparatus, as for monitoring cathodic protect Voltage monitoring apparatus, as for monitoring cathodic protect

1992-08-17

1994-06-28

Regan, Maura K.

Electricity: measuring and testing

Testing potential in specific environment

Voltage probe

324102, 307131, G01R 3102, G01R 1900, H01H 3500

Patent

active

053250478

ABSTRACT:
A voltage monitoring apparatus for monitoring a value of a rectified AC voltage applied across a capacitive load is disclosed. The voltage has an AC component and a DC component. The apparatus monitors the value of the rectified cyclical AC voltage at a selected portion of the cycle. The voltage to be measured can either be the instantaneous value of the voltage at a predetermined time in the cycle, or the RMS value of the entire cycle. The apparatus is especially useful for monitoring a cathodic protection voltage applied to a metallic structure in contact with the ground and subject to corrosion, such as often applied to an underground pipeline. Such voltage is typically full wave rectified AC, and it is beneficial to know if the minimum voltage value of each cycle applied to the pipeline is below a predetermined value.

REFERENCES:
patent: 2249323 (1941-07-01), Mitchell
patent: 2591738 (1952-04-01), Spencer
patent: 2784322 (1957-03-01), Johnson
patent: 3465208 (1969-09-01), Patrickson et al.
patent: 3633071 (1972-01-01), Fendt
patent: 4029937 (1977-06-01), Russell
patent: 4080565 (1978-03-01), Polak et al.
patent: 4219807 (1980-08-01), Speck et al.
patent: 4255669 (1981-03-01), Naugle
patent: 4437065 (1984-03-01), Woudstra
patent: 4591792 (1986-05-01), Birchmeier et al.
patent: 4642481 (1987-02-01), Bielinski et al.
patent: 4816747 (1989-03-01), Bushman et al.
patent: 4903130 (1990-02-01), Kitagawa et al.

Affiliated with

Also associated with

Rating

Voltage monitoring apparatus, as for monitoring cathodic protect does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage monitoring apparatus, as for monitoring cathodic protect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage monitoring apparatus, as for monitoring cathodic protect will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2379625