Phase sequence indicator

Details Phase sequence indicator Phase sequence indicator

1993-04-26

1995-05-30

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Polyphase

324 86, 361 76, G01R 1914

Patent

active

054205034

ABSTRACT:
A phase sequence indicator with two measuring contacts for contacting with connections of the object to be measured has a grouring contact touchable by the user, an evaluation circuit connected to the measuring contacts and the grounding contact, and an indicating device controlled by the evaluation circuit for indicating the direction of the rotary field. The evaluation circuit has a voltage-testing circuit for detecting the value of the voltage occurring between the measuring contacts, and the indicating device comprises additional indicating elements for indicating the value of the voltage.

REFERENCES:
patent: 3215865 (1965-11-01), Grimme
patent: 3870950 (1975-03-01), Laas
patent: 4542433 (1985-09-01), Schaefer
patent: 5153572 (1992-10-01), Caldwell

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