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Description
Overview
Essential details：EDS460-D-1 Insulation fault locators with control and display
Product description
The insulation fault locators ISOSCAN* ED5460/490 in combination with the ISOMETER*IRDH575 or the locating curent injector PGH are applied for localising insulation faults inunearthed systems (lT systems). The locating current signals generated by the insulationmonitoring device lRDH575 or the locating current injector PGH are detected by measur-ing current transformers and evaluated by the insulation fault locators. Up to 12 measuring current transformers can be connected to one EDS460/490. A total of 90 EDS insulation fault locators can be connected via one Rs-485 interface (BMS protocol). Hence, upto 1080 circuits can be monitored. The maximum scanning time is …10 s, see TGH1394.
Application
Insulation fault location in Ac, Ac/Dc and DcIT systemsMain and control circuits in industrial plants and shipsDiode-decoupled DCIT systems in power stationsSystems for medical locations
Function
Insulation fault location is started manually or automatically via the ISOMETER* IRDH575 orthe PGH. Once started, the insulation fault locator EDS simultaneously scans all measuringcurrent transformers (channels). lf several EDS exist, these devices are also scanned simultaneously.
When the locating current detected by a measuring current transformer exceeds the setresponse value, the alarm LED 2 lights up, the common alarm relay switches and the faultycircuit is indicated as plain text on the graphical display. Version EDs…L indicates faultyoutgoing circuits via alarm LEDs. The connection between the measuring current transformerand the insulation fault locator is continuously monitored. In the event of wire interruption.the alarm LED 1 lights up and the alarm relay switches.With the fault memory activated, the alarm messages of the individual channels remainsstored until the reset button is pressed or until a reset command is given via the RS-485interface. When the fault memory is deactivated, the alarm message remains stored untilthe insulation fault is eliminated.
EDS460-D-1
sunny He
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EDS460-D-1 Insulation fault locators with control and display
Product Description
History memoryin EDs460/461-D/EDS490/491-D
The device utilises a history memory for failsafe storing of up to 300 measured values/events (date, time, channel, event code, measured value), so that all data about an outgoingcircuit or an area can be traced back at any time (what happend when).
AC residual current measurement
EDS insulation fault locators can also be used for the indication of AC residual currents inunearthed power supplies (lT systems). This is essential when also AC residual currentsare to be localised in the circuits.
Device variants
EDS460-D
Device version ED5460-DG features a backlit graphical display where information can bedisplayed in various ways. This version is applied when detailed information about all devicesin the switchboard cabinet, connected to the bus, are to be displayed locally. This deviceis capable of assigning parameters to all devices connected to the BMs bus and displayingall measurement details. Several ED5460-DG devices can be used in one system.
EDS460-L
Device version ED5490D/EDS490L utilises a two-digit 7-segment display where the address of this device is displayed within the BMS bus. Various error codes are displayedtoo. The alarm LEDs indicate in which measuring channel the response value has beenexceeded. Parameter setting is only possible via an EDS…D, an ISOMETER* IRDH575, thealarm and test combination MK2430 or the protocol converter COM460lP.
EDS490-D/EDS490-L
In comparison to the device version described before, EDS490-D/EDS490-L feature agalvanically isolated alarm contact (N/0 contact), for example, to trigger a circuit breakerin this subcircuit when a response value has been exceeded.
