Operation and setting
42
IRDH275BM-7_D00123_06_M_XXEN/07.2018
5.5 Menu ISO ADVANCED: Setting of the extended
functions
5.5.1 Coupling devices AGH: 675S-7…
The ISOMETER® is connected to the AGH675S-7 by connecting the terminal AK
to terminal 5. The nominal operating range is extended to AC 0…7.2 kV
(AGH475S-7) or AC 0…15.5 kV (two AGH475S-7MV). When terminal 2 will be
connected to the midpoint of the DC intermediate circuit, a voltage of 14.4 kV
is permitted.
5.5.2 Adaptation to the system leakage capacitance Cemax
This menu allows to adapt the ISOMETER® to the maximum system leakage
capacitance (2 or 5 µF). Please note that the basic measuring time will take no
longer than five minutes when virtually no converter-related disturbances are
present.
Factory setting = 2 µF.
5.5.3 Measuring principle (Measure: AMP)
The AMP measuring principle is factory set.
5.5.4 Setting the repetition time for automatic self tests
(Autotest: 24h)
The time for the repetition of automatic self tests can either be set to 1 hour
or to 24 hours or can be deactivated.
Factory setting = 24 h
5.5.5 Setting the real-time clock (Clock)
The setting of the real-time clock is the time base for the memory and for the
automatic self test. In case of failure of the supply voltage, the real-time clock
keeps running for approximately 30 days. When the device will be switched
on after this period, a flashing "C" appears on the display and the clock has to
be set again.
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