EDS460-DG insulation fault evaluators are used in combination with the ISOMETER® IRDH575 or the PGH insulation fault test device to localise insulation faults in DC power supplies (IT systems). The test current signals generated by the insulation monitoring device IRDH575 or the insulation fault test device PGH are scanned by measuring current transformers and evaluated by the insulation fault evaluators. Up to 12 measuring current transformers can be connected to one EDS460-DG. If more than 12 branch circuits are to be monitored, up to 90 EDS evaluators can be connected via an RS-485 interface (BMS protocol), thereby 1080 branch circuits can be monitored. The maximum scanning time is approx. 4…10 s, see TGH1429. This device version is particularly suitable for systems involving high system leakage capacitances (20000 µFV, see characteristics in the chapter “Technical data”).

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  • Features
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  • Insulation fault location in IT systems
  • For DC IT systems (20…308 V)
  • Control and display function within one device
  • 12 measuring channels (circuits) for measuring current transformers of the CTAC, WR, WS series
  • Up to 90 EDS evaluators in one system (1080 measuring channels)
  • Scanning time max. 10 s for all measuring channels (parallel scanning)
  • Response sensitivity 2…10 mA
  • History memory to store 300 events
  • Two alarm relays with one changeover contact each
  • N/O or N/C operation, selectable
  • Connection external test/reset button
  • Indication via graphical display
  • BMS address range 1…90
  • Serial RS-485 interface
  • Continuous CT connection monitoring
  • Fault memory behaviour selectable
  • Additional AC residual current measurement
  • Insulation fault location in DC IT systems
  • DC main circuits in industrial installations and ships
  • Diode-decoupled DC IT systems in power stations


Optional accessories for ISOSCAN® EDS460-DG

TypeSupply voltage USArt. No.
DI-1DL (interface repeater)AC 85…260 V, 50…60 HzB95012047
DI-2USB (interface converter RS-485/USB)supplied by the USB port, no additional power supply required.B95012045
AN471 (power supply unit for DI-1 or DI-2)AC 230 V 50/60 Hz/AC, DC 20 VB924189
* Absolute values

Protocol converters

TypeSupply voltage USArt. No.
COM465IPAC/DC 24…240 V, 50…60 HzB95061065
COM462RTUAC/DC 76…276 V, 42…460 HzB95061022

Measuring current transformers

TypeInside diameter/mmType of constructionArt. No.
CTAC20ø 20circularB98110005
CTAC35ø 35circularB98110007
CTAC60ø 60circularB98110017
CTAC120ø 120circularB98110019
CTAC210ø 210circularB98110020
WR70x17570 x 175rectangularB98080609
WR115x305115 x 305rectangularB98080610
WS20x3020 x 30split-coreB98080601
WS50x8050 x 80split-coreB98080603
WS80x8080 x 80split-coreB98080605
WS80x12080 x 120split-coreB98080606
WS80x16080 x 160split-coreB98080608

Alternative measuring current transformers from the Bender range

TypeInside diameter/mmType of constructionArt. No.

Variants of ISOSCAN® EDS460-DG

Ordering information
TypeSupply voltage Us*Response valueArt. No.
EDS460-DG-1DC 16…94 V / AC 16…72 V, 42…460 Hz2…10 mAB91080018
EDS460-DG-2AC/DC 70…276 V / AC 42…460 Hz2…10 mAB91080019
EDS460-DGW-1DC 16…94 V / AC 16…72 V, 42…460 Hz2…10 mAB91080018W
EDS460-DGW-1AC/DC 70…276 V / AC 42…460 Hz2…10 mAB91080019W
* Absolute values
EDS460-DGW.. Version for increased climatic and mechanical stresses.

Downloads for ISOSCAN® EDS460-DG



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