GMC-I Messtechnik GmbH 9
4 Initial Startup
4.1 Connecting the Test Instrument to the Mains
➭ See section 12 for nominal mains values (nominal ranges of
use).
➭ Connect the test instrument to the mains cable via its inlet
plug and insert the mains plug into an electrical outlet. The
function selector switch can be set to any position.
If a mains outlet (earthing contact outlet) is not available, or if
only a 3-phase outlet is available, the adapter socket can be
used to connect the phase conductor, the neutral conductor
and the protective conductor. The adapter socket has three
permanently attached cables and is included with the KS13
cable set.
If connection is not possible via an earthing contact out-
let: Shut down mains power first.
Then connect the cables from the coupling socket to the
mains using pick-off clips in accordance with the dia-
gram.
Disconnection from mains power is only possible via the
mains plug.
Figure 1 Connecting the Test Instrument to the Mains
4.1.1 Measurements in IT Systems (new parameter as of firmware
1.5.0)
The IT system
setting can be
activated for all
single measure-
ments and test sequences in the SETUP switch position (Setup 1/
3) in the All measurements submenu (in this case the icon
appears in the header of each display page):
with “Measurement at IT system” set to Yes: active leakage current
measurements (or all measurements with reference to PE at the
mains connection side) are disabled. Test sequences which
include measurements of this sort are also disabled.
If, when being connected to line voltage, the SECUTEST detects
a change at PE as compared with the previously used mains con-
nection, the inspector is asked directly after initial start-up if the
currently used outlet belongs to an IT system. The IT system
option in SETUP is activated based on the user’s answer. If “Mea-
surement at IT system” is activated, this is indicated by the
icon in the header.
Regardless of this, it’s always possible to accordingly change the
option manually in SETUP.
The setting for the “Measurement at IT system” option is retained
even after disconnection from the mains.
In IT systems, active leakage current measurements (or any mea-
surements with reference to PE at the mains connection side) do
not deliver reliable measured values, for which reason all single
measurements of this sort, as well as test sequences which
include this type of measurement, are disabled when the “Mea-
surement at IT mains” option has been activated in SETUP.
The Meas. at IT mains parameter can be set in Setup:
Setup 1/3 > All Measurements > Meas. at IT Mains
L1
N
Green-yellow
Green-yellow
PE
L1
L2
L3
N
PE
L1
L2
L3
N
Green-yellow
KS13
When selecting
between two
states: direct
change without
submenu
Icon Toggle
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