CPC Main Group
G01R 25/00 Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
5 direct subcodes
Child Classifications
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- G01R 25/02 in circuits having distributed constants
- G01R 25/04 involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference
- G01R 25/06 employing quotient instrument
- G01R 25/08 by counting of standard pulses