Instructions
GMC-I Messtechnik GmbH 5
2 Applications
Use of the test adapter eliminates bother-
some replugging, and thus reversing of the
phases as well during measurement of RISO,
Z
L-PE and ZL-N.
The following measurements are supported:
L1-PE, L2-PE, L3-PE,
N-PE, L+N-PE,
L1-N, L2-N, L3-N,
L1-L2, L1-L3, L2-L3
The following test instruments are suitable
for use with the test adapter:
– PROFITEST MTECH+, as of FW V03.04.00
– PROFITEST MXTRA, as of FW V03.04.00
– PROFITEST PRIME, as of FW V03.05.00
Indication of Conductor Connections
The LEDs indicate conductor continuity
between the connected system and the test
instrument’s input:
– Red LED: Switch closed,
conductor continuity
– Green LED: Switch open, no connection
The line circuit-breaker is opened and
closed via the test adapter controller at the
respective test instrument.
Measuring Insulation Resistance
RISO in Electri-
cal Systems
In order to be able to detect faults in electri-
cal systems which are caused by defective
insulation, insulation resistance must be
measured between each active conductor
and the protective earth conductor.
Observe the corresponding chapters in the
operating instructions of your test instrument
concerning correct measurement proce-
dures.
Note!
Thanks to 4-wire measurement,
there’s no need to determine the test
adapter’s offset value.
Measuring Loop and Line Impedance Z
L-PE and
ZL-N
Loop impedance is the sum of all resis-
tances within the distribution network and
the conductors in the branch circuit.
In order to be able to determine the effec-
tiveness of residual current devices, loop
impedance Z
L-PE must be ascertained
between the phase conductor and the pro-
tective conductor. The same measuring pro-
cedure is used for line impedance Z
L-N as is
also the case for loop impedance Z
L-PE.
However, the current loop is completed via
neutral conductor N, rather than protective
conductor PE as is the case with loop
impedance measurement.
Observe the corresponding chapters in the
operating instructions of your test instrument
concerning correct measurement proce-
dures.
Note!
Thanks to 4-wire measurement,
there’s no need to determine the test
adapter’s offset value.
PROFITESTREMOTE Applications