Datasheet
Gossen Metrawatt GmbH 11
PROFITESTMASTER SERIES
PROFITESTMTECH+, MPRO, MXTRA, MBASE+
IEC 60364-6, EN 50110-1
Special Measurements
PROFITEST MTECH+, PROFITEST MXTRA
Tripping Test for Type B, AC/DC Sensitive RCDs
with Rising DC Residual Current and Measurement of Tripping Current
With the selector
switch in the I
F
position, slowly
rising current
flows via N and
PE. The momen-
tary measured
current value is
continuously dis-
played. When the
RCCB is tripped,
the last mea-
sured current value is displayed. A greatly reduced rate of increase is
used for delayed RCCBs (type ).
Tripping Test for Type B, AC/DC Sensitive RCDs
with Constant DC Residual Current and Measurement of Tripping Time
With the selector switch set to the respective nominal residual
current, twice the selected nominal current flows via N and PE.
Time to trip is measured for the RCCB and displayed.
Loop Resistance Measurement with Suppression of RCD Tripping
The test instruments make it possible to measure loop impedance
in TN systems with type A, F
and AC RCCBs
(10, 30, 100, 300, 500 mA nominal residual current).
The respective test
instrument gener-
ates a DC residual
current to this end,
which saturates the
RCCB’s magnetic
circuit.
The test instrument
then superimposes
a measuring current
which only demon-
strates half-waves
of like polarity. The
RCCB is no longer
capable of detecting this measuring current and is consequently
not tripped during measurement.
Selective Earth Resistance Measurement (mains powered)
Special Measurements
PROFITEST MTECH+ and PROFITEST MXTRA
Checking the Operating States of Electric Vehicles
at Charging Stations per IEC 61851
In combination with an adapter, the operating state of an electric
vehicle can be tested at charging points in accordance with
IEC 61851. The adapter is used to simulate the various operating
states of a fictitious electric vehicle connected to a charging sta-
tion.
Special Measurements
PROFITEST MXTRA
Testing of Insulation Monitoring Devices (IMDs)
Insulation monitors are used in
power supplies for which a single-
pole earth fault may not result in
failure of the power supply, for
example in operating rooms or
photovoltaic systems.
Insulation monitors can be tested
with the help of this special func-
tion. After pressing the start but-
ton, an adjustable insulation resis-
tance is activated between one of
the two phases of the IT system to
be monitored and ground to this end. This resistance can be
changed in the manual sequence mode with the help of the soft-
keys, and it can be varied automatically from R
max
to R
min
in the
automatic operating mode.
Time during which the momentary
resistance value prevails at the
system until the next change in
value is displayed. The IMD’s dis-
play and response characteristics
can be subsequently evaluated
and documented with the help of
the softkeys.
I
F
/mA
t [s]
Start
Tripping
S
Start
t1
t3
Measure
t2
Operation
RCD Disabled!
t
I
F
/mA
Example: MENNEKES test box
(states A through E)