Process for determining the phase sequence in a three-phase netw

Details Process for determining the phase sequence in a three-phase netw Process for determining the phase sequence in a three-phase netw

1996-09-25

1999-01-12

Ballato, Josie

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

361 76, 361 77, 340658, G01R 2500

Patent

active

058595309

ABSTRACT:
In a first measurement step, the two test probes of a measurement apparatus are contacted with two of the three phase lines. The measurement apparatus determines the frequency of the three-phase voltage. In a subsequent second measurement step, one of the two test probes is brought into connection with the remaining third phase line. The other test probe is held in contact with the other line. In the second measurement step the voltage level or voltage profile on the third phase line is evaluated inside the measurement apparatus in comparison to the first phase line during one or more time windows of length .pi..

REFERENCES:
patent: 4278937 (1981-07-01), Immler
patent: 4710703 (1987-12-01), Harkiewicz
patent: 4901005 (1990-02-01), Shin
Elektrotechnik und Kerntechnik Grundlagen, p. 87, Oct. 1971.

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