8
Gossen Metrawatt GmbH
5.4
Testing of Differential Current during Automatic
Testing per Test Standard
SECUTEST SIII / SIII+ / SIII+H; SECULIFE ST / ST HV:
➭
Initiate the standard-specific setup.
➭
Select „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.
➭
Select „Differential current“.
SECUTEST S2N+ / S2N+10 / N+w:
➭
Select 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 / ST PRO; SECULIFE ST BASE /
ST BASE25 and/or feature I01:
➭
Select connection type AT3-adapter for I
PE
mea
-
surement 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 test instrument. 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 test
instrument: 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 volt
-
age (
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 test instrument.
6
Testing Extension Cables
The SECUTEST port (14) may remain connected
to sockets 2 and 3 at the test instrument during
this test. Perform testing in accordance with the
operating instructions included with the test
instrument!
Observe the following instructions when using the
test instrument in combination with the AT3-III E:
The test probe at the end of the probe cable of the
test instrument must first be connected to the
respective socket (15) (probe 1 to 4) of the associ
-
ated 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 SIII / SIII+ / SIII+H; SECULIFE ST / ST HV:
Select the following test sequence from the initial
window at the 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 / N+w:
➭
Select the following switch position:
VDE 0701-0702
➭
Select EL1 as connection type.
SECUTEST PRO / ST PRO; SECULIFE ST BASE /
ST BASE25 and/or feature I01:
➭
Select 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 M
should not be
significantly exceeded.
Note!
In conductors with control lamp
(usually glow
lamp in the switch), the result of the continu
-
ity 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 SIII / SIII+ / SIII+H; SECU
-
LIFE ST / ST HV; SECUTEST S2N+ /
S2N+10 / N+w:
R-PE between probe and
socket 3 or R between socket 1 and 2.
SECUTEST PRO / ST PRO; SECULIFE ST
BASE / ST BASE25:
R-PE between probe 1 and probe 2.
SECUTEST BASE / BASE10 / ST BASE / ST
BASE10:
R-PE between probe 1 and measurement
cable at the earth contacts of the test socket
(test type
PE(PD)-P1).