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Gossen Metrawatt AT3-III E Manual

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8GMC-I Messtechnik GmbH
6.3 Testing for Short-Circuits, Interruptions and
Reversed Conductors
Testing of single-phase cables is performed as
described in the instructions included with the
SECUTEST.../SECULIFE ST under (optional EL1
test adapter). The EL1 test adapter accessory is
included in the AT3-III E as a subassembly.
Note!
While testing the continuity of single-phase
extension cables, AT3-III E may NOT be sup-
plied with line voltage.
While testing the continuity of 3-phase exten-
sion cables, AT3-III E must be connected
with line voltage.
Note:
When testing device cable connections (socket
4/plug 4) polarity L/N is not being checked.
Testing of 3-phase cables is the same, except that it
also includes an additional test for reversing of
conductors L1, L2, L3 and N.
3-phase cables have only passed testing for
short-circuits, interruptions and reversed
conductors (clockwise rotation) if the following test
result appears: “Cable OK”.
Messages such as “interruption / short-circuit”
always indicate that the cable is defective. If this is
the case, conductors L1, L2, L3 and N may also
be reversed. The actual defect must be
determined.
Figure 2 Connecting Single or 3-Phase Extension Cables to the AT3-III E with the SECUTEST...
SECUTEST
34
4
4
3
SECUTEST
1
2
21
230/400 V 50 Hz
230 V 50 Hz
… 8 …


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