Bender ISOMETER IRDH575 Manual page 35

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