Sonel P-3, Руководство по эксплуатации

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2.7 Phase sequence test
Notes:
The phase sequence may solely be deter-
mined in a three-phase system. Contact of the
touch electrode during measurement in a single-
phase system gives a random result.
2.8 Phasing
The phasing function facilitates comparison of
voltage phases in two distant point of the installa-
tion.