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Gossen Metrawatt AT3-III E Manual

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GMC-I Messtechnik GmbH 7
5.4 Testing of Differential Current
during Automatic Testing per Test Standard
SECUTEST SII / SIII / SECULIFE ST:
ÐInitiate the standard-specific setup.
ÐSelect „Sequence“ and deactivate the auto-
matic test method.
During testing according to standard, a menu
appears which proposes two options, i.e. equiva-
lent leakage current and differential current.
ÐSelect „Differential current“.
SECUTEST S2N+ / S2N+10 / S2N+W:
ÐSelect switch position „active“ here.
Line voltage is applied to the DUT via the AT3-III E
tester. The differential current of the DUT is mea-
sured while allowing for a function test of the DUT.
SECUTEST PRO (or feature I01):
Ð
Select connection type AT3-adapter for IPE
measurement in the setup of the test sequence.
5.5 High-Voltage Test
Caution: High-Voltage!
Prior to performing the test remove the
probe including probe tip from sockets 4
and 5 of the SECUTEST.../SECULIFE ST.
Do not touch the DUT, the device plug
and the earthing contact cable of the
AT3-III E during the voltage test.
Do not unplug the AT3-III E connector
cable (13) from the test socket at the
SECUTEST.../SECULIFE ST: the device
under test may still be charged, and high
voltage may be present at the earthing
contact plug.
During this test, L1, L2, L3 and N (short-circuited)
are measured against PE with the preset high
voltage (max. 1.5 kV!).
Please observe all additional safety precautions
on performing the test as well as the note on the
exclusion of liability in the operating instructions of
the SECUTEST... test instrument.
6 Testing Extension Cables
The SECUTEST port (14) may remain connected
to sockets 2 and 3 at the SECUTEST.../
SECULIFE ST during this test. Perform testing in
accordance with the operating instructions
included with the SECUTEST... test instrument!
Observe the following instructions when using the
SECUTEST.../SECULIFE ST in combination with
the AT3-III E:
The test probe at the end of the probe cable of the
SECUTEST.../SECULIFE ST must first be
connected to the respective socket (15) (probe 1
to 4) of the associated plug at the AT3-III E. In
order to test, only connect the plug and socket at
the ends of the respective extension cable to be
tested to the associated device plug and socket at
the AT3-III E. The associated connection
diagrams are shown on the following pages.
SECUTEST SII / SIII / SECULIFE ST:
Select the following test sequence from the initial
window at the SECUTEST.../SECULIFE ST test
instrument:
Extension cable: “X” WITH EL1
Note!
Testing cables by means of the AT3-III E is
only possible with this setting.
SECUTEST S2N+ / S2N+10 / S2N+W:
ÐSelect the following switch position:
VDE 0701-0702
ÐSelect EL1 as connection type.
SECUTEST BASE(10)/PRO (or feature I01):
ÐSelect AT3-III E as connection type.
6.1 Measuring Protective Conductor Resistance
Testing is performed according to the instructions
included in chapter 5.1.
6.2 Measuring Insulation Resistance
L1, L2, L3 and N (short-circuited) are measured
against PE during insulation testing. Due to good
cable insulation, a value of 2 MΩ should not be
significantly exceeded.
Note!
In conductors with control lamp (usually glow
lamp in the switch), the result of the
continuity test for L and N may be distorted
by the additional resistance of the glow
lamp.
In case of doubt, we recommend performing
a continuity test for L and N by means of
resistance measurement (R-PE or R-ISO):
e. g. SECUTEST S2/ S3...: R-PE between probe
and socket 3 or R between socket 1 and 2.
SECUTEST PRO: R-PE between probe 1 and
probe 2.
SECUTEST BASE(10):
R-PE between probe 1
and measurement cable at the earth contacts
of the test socket (test type PE(PD)-P1).
… 7 …


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