8
Left rotary field
Firmly
Ш
Testing of phase-sequence direction
is possible from 100V AC voltage (phase
to phase) provided the neutral is earthed.
On making contact with both test elec-
trodes (probe tips) to two phases of the
three-phase power supply which are
connected in clock-wise rotation, a “
”
symbol appears in the LCD Display.
If the rotation is anticlockwise, then a “
”
symbol is displayed. In this case both
phases of the unit should be switched
around.
Note :
Testing the phase rotation always
requires a negative phase rotation test!
To ensure a connect test, it is better to
test on a known source.
