Commissioning flow chart
36
IRDH575_D00089_05_M_XXEN/01.2020
Commissioning of the insulation fault location function (EDS) (2)
Are all bus nodes available after
the completion of the test ?
no
yes
Check the wiring and bus nodes
(RS485 LED)
Alarm LEDs light up
Alarm relays switch
yes
Check whether the sub menu EDS auto
is activated in the EDS SETUP menu
Carry out the test in the
EDS460/490 resp. EDS470 menu
When the faulty subcircuit is
recognized correctly, the
display indicates :
ADDR:xx k:xx xxmA
yes
Are there other CTs installed
that are to be checked ?
Do the EDS4... recognize all
measuring transformers correctly?
no
Check the CT wiring
yes
no
no
Remove the resistance and select
another location downstream a
measuring transformer where the
insulation fault is to be simulated.
Does the LED "EDS on" light up?
Do the RS485 LEDs light at the
bus nodes ? Are the CTs being
scanned by the EDS4... ?
Shall the basic setting be
maintained?
yes
no
Change the settings in EDS SETUP,
EDS460/490 resp. EDS470 menu
Perform a functional test between
system and earth using a suitable
resistance for the mains voltage.
Resistance value:
50% of the of the lowest response
value downstream from the CT.
no
yes
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