iso685-D-P_D00170_00_M_XXDE/06.2016
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Insulation fault location
12. Insulation fault location
12.1 General description
An additional function of the ISOMETER® in combination with the EDS is the selective in-
sulation fault location. The insulation faults detected in the IT system by the ISOMETER®
can be located by means of an EDS and a measuring current transformer.
For further information regarding the function principle of the insulation fault location,
refer to 3.4 “Insulation fault location” on page 13.
12.2 Required settings for insulation fault location
Connecting and commissioning the system consisting of ISOMETER® and EDS
correctly.
For further information regarding the connection of the EDS, refer to 6.11 “Connecting
the EDS to the ISOMETER®” from page 26, at “Commissioning flow chart” on page 32 and
to the corresponding manual of the EDS.
Setting locating current and EDS mode.
These settings can be made either during initial commissioning
(see 7.2 “Initial commissioning” from page 33) or in the device menu of the ISOMETER®
(see 10.1 2.0 “EDS (insulation fault location)” from page 51).
For further information regarding the locating current for insulation fault location, refer
to 10.1 2.1.1 “Current” on page 51.
For further information regarding EDS modes, refer to 10.1 2.1.2 “Mode” on page 52.
12.3 Indication on the display
The active insulation fault location is indicated on the display of the ISOMETER®.
For further information, refer to 8.7 “Insulation fault location” from page 39.
12.4 Starting and stopping the insulation fault location
The insulation fault location can be started and stopped via different interfaces:
• Shortcut button "EDS"
Manually starts/stops the insulation fault location, which runs continuously. If the
device is started continuously, it measures until it is manually stopped via the short-
cut button (see “Display elements and device buttons” on page 18).
• Device menu
• Modbus
• Web server
• Digital input
For further information regarding start and stop conditions of the insulation fault loca-
tion, refer to 10.1 2.1.2 “Mode” on page 52.
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