Safety information
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2. Safety information
2.1
Intended use
EDS460-DG insulation fault evaluators are used to localise insulation
faults in unearthed DC power supply systems (IT systems). DC systems
of DC 20...308 V can be monitored.
An EDS system consists of EDS460-DG insulation fault evaluators and
IRDH575 A-ISOMETER® or PGH insulation fault test device. Using
measuring current transformers, EDS460-DG insulation fault evaluators
detect test current signals generated by the IRDH575 insulation moni-
toring device or by the PGH... insulation fault test device and evaluate
them.
Up to 12 measuring current transformers can be connected to one
EDS460-DG. Up to 90 EDS460-DG evaluators can be connected via a
BMS bus (RS-485 interface with BMS protocol), thereby up to 1080
measuring channels (sub-circuits) can be monitored. The scanning time
for all channels is approximately 4…10 s.
Using the IRDH575 or PGH... with a high test current may
damage sensitive loads (e.g. in control circuits) or may
accidentally activate switching operations. Therefore, it
is recommended to use a PGH... with a low test current or
to set a low test current at the IRDH575. In case of doubt,
please contact a BENDER product manager.
Caution
