Hioki PD3259-50, Instruction Manual

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Displaying the Predicted Three-Phase Circuit Status
3.7 Displaying the Predicted
Three-Phase Circuit Status
When measuring a three-phase delta-wired circuit with one phase
grounded, the PD3259 can automatically predict the grounding
phase.
In addition, the instrument can predict whether the three-phase
circuit has an open phase.
The results are shown using icons on the display.
These functions are available only in Japan.
Grounding phase prediction
If phase S is grounded, the icon will
be shown underneath the icon.
Similarly, if phase R is grounded, the
icon will be shown underneath the
icon; if the phase T is grounded, the
icon will be shown underneath the
icon.
(The similar display manner is used for
the phase labeling system with 1, 2, and
3.)
Open-phase prediction
If the instrument predicts that the three-
phase circuit has an open phase, the
icon corresponding to that among the
icons (or the icons) will be
hidden.
Proper identification of the grounding phase or open phase is not
guaranteed for these predictions. Results may be inaccurate if the
circuit incorporates complex wiring or if the distance between the
measurement point and a wire break point meets certain criteria.
HIOKI PD3259C961-00