EDS44x_D00201_07_M_XXDE/06.2020
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Settings
10. Settings
10.1 EDS settings on the ISOMETER®
Settings of the EDS44x are made via the device menu of the ISOMETER®. For a detailed
menu description, refer to the manual of the ISOMETER®.
10.1.1 Locating current injector settings
10.1.1.1 Mode
Three different start and stop conditions for insulation fault location can be set on the
ISOMETER®:
• Manual The EDS system can be started manually using a shortcut button or via the
menu. Afterwards, the EDS system is permanently active, regardless of the
insulation value and the alarm message of the ISOMETER®. The EDS system
can be stopped manually at any time using the shortcut button or via the
menu.
• auto The EDS system is activated automatically as soon as the response values of
alarm 1 and alarm 2 of the ISOMETER® fall below the limit. It remains active
until no more insulation faults are detected. For new measurement of the
insulation fault values by the ISOMETER®, the EDS insulation fault location is
cyclically interrupted for approx. 5 minutes. The EDS system can be stopped
manually at any time using the shortcut button or via the menu.
• 1 cycle The EDS system is automatically activated for 5 minutes
as soon as the response values of alarm 1 and alarm 2 of the ISOMETER® fall
below the limit. After this cycle, the insulation fault location is completed.
The EDS system can be stopped manually at any time using the shortcut
button or via the menu.
Insulation monitoring
During the insulation fault location process, insulation monitoring is tem-
porarily inactive.
During the insulation fault location process, connection and short-circuit
monitoring is temporarily inactive.
10.1.1.2 Locating current
You can set the maximum locating current of the locating current injector in the ISOME-
TER®.
• For the EDS441-x, a locating current of 1 mA…5 mA is suitable.
• For the EDS440-x, a locating current of 10 mA…50 mA is suitable.
10.1.2 Trigger function
The locating current pulse of the ISOMETER® is synchronised with the measurement tech-
nology in the EDS44x. The EDS44x is informed when to expect a locating current pulse.
This allows a more reliable detection of the locating current pulse in the event of distur-
bances. Disturbances can be caused e.g. by variable-speed drives, rectifiers, actuators,
noise filters, PLCs, or control electronics.
• 1 mA for EDS441-x
• 1.8 mA for EDS441-x
• 2.5 mA for EDS441-x
• 5 mA for EDS441-x/EDS440-x
• 10 mA for EDS440-x
• 25 mA for EDS440-x/EDS440-LAF-4
• 50 mA for EDS440-x/EDS440-LAF-4
A combination of a high current transformer inductance, a high residual
current outside the specified frequency range and simultaneously a high
locating current can lead to saturation effects in the current transformer
and thus influence the measurement. It is recommended to work with a
locating current of max. 10 mA (EDS440). If the locating current is distrib-
uted among several parallel faults, it can be increased.
• Com Synchronisation via BS bus. The EDS44x only searches for insulation faults if the
insulation fault location has been started. It knows the time of the locating cur-
rent pulse. Less time is needed for the insulation fault location as with the set-
ting "auto".
• auto No synchronisation (e.g. if there is no BS bus or Modbus RTU).
The EDS44x continuously searches for insulation faults.
If the BS address is set to 00, the device goes into the trigger mode "auto".
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