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3. After the power-up sequence, only the ON LED will stay
illuminated, all others will extinguish.
4. Prove the function of the L1, L2, L3 sensor clips by attaching
each in turn to a known live insulated conductor energised
at 75V AC or greater, and confirm that the L1, L2, L3 LED's
illuminate. The tips of the Δ marks at the side of the clip jaws
should align with the centre of the conductor used for testing
(see figure 1).
Do not use the unit if the L1 or L2 or L3 LED's do not illuminate
when performing step 4 above.
3.7 Testing a 3 Phase Distribution System
1. The three sensor clips are marked L1, L2, L3. These relate to
the L1, L2, L3 LED's on the instrument facia.
2. To determine phase presence and phase sequence, attach
the three sensor clips of the PSI4000 / PSI4300 to the three
separate unshielded phase cables of the 3 phase electrical
distribution system to be tested, whilst referring to figure 1 and
observing the testing considerations of section 3.6.
3. Refer to table 2 of section 3.8 to determine onto which cable to
attach L1, L2 and L3 (see Note 2).
4. The presence of live phases and the phase sequence are
indicated by the LED's and the buzzer sounding as soon as
detection is complete. Refer to table 1 to determine the status of
each phase cable from the LED indications (see Note 3).
Figure 1
Conductor
under test
Δ marks
Sensor clip
6
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