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4.6 Testing phase and phase sequence
The MultiSafe DSP 5 is equipped with 2 triangular
LEDs for the indication of phase sequence tests.
Attention!
These tests can be performed at a nominal voltage of
at least 165 V (50 Hz) against earth.
When performing these tests, the device must be
hold closely at the handgear of the display part
Note:
You may wear insulating gloves when perfor-
ming the tests.
Tests can be impaired by unfavourable locations,
for example on wooden ladders or insulating floor
coverings, as well as in improperly earthed AC
voltage systems.
4.6.1 Phase test
Determination of the outer conductor occurs by
applying the test eleL2 to the conductor.
When “POL” appears on the display and the LED
lights up, the conductor is live.
4.6.2 Testing phase sequence
To determine the phase sequence between two
phases in the phase network apply both test
electrodes, clasp the handle of the display part and
proceed as follows:
- Search for the phase conductors using one pole
(see phase test).
- Apply both test electrodes to the two phase
conductors (display 400 V).
- When phase L1 is applied to the test electrode
marked (- L1) and L2 to the other test electrode of
the display unit „
R“ appears at the display for
rotation is clockwise. If „L
“ is indicated direction
of rotation is counter-clockwise.
- The test result has to be checked by exchanging
the two test electrodes. The opposite direction
of rotation must be displayed.
If 230 V is displayed instead of 400 V, the neutral
conductor may have been contacted with one of the
test electrodes.
4.6.3 Function phase sequence test without
earth potential (ROTATION)
The testing range is 20 - 1200 V AC / 50 Hz
- Identify the outer conducter by using one pole
or by bipolar testing against earth.
- Press button
IT
to start testing. The display
shows “rdy“ and “– U –“ which signalizes
readiness for testing.
- Measure the first two phases, e.g. L1 to L2.
Afterwards the display shows “chang“ and
“L1“. Switch over to the next phase with
handgear L1
within 5 seconds.
The display unit must remain at the initial phase.
- As soon as the handgear L1 was changed the
display shows the
now
measured phase:
“RiG“ for a clockwise or “LEF“ for a counterclock
wise rotation.
The rotation direction is additionally signalized
by LEDs. A switch back to previous phase is not
possible.
