BENDER EDS460-D-1 | ISOSCAN Insulation Fault Locator

Description

Core Product Summary (Brand / Model / Key Attributes)

The BENDER EDS460-D-1 (Art. No. B 9108 0001) is an ISOSCAN® insulation fault locator from the EDS460 series. It localizes insulation faults in unearthed AC, three-phase AC, DC and AC/DC IT systems when used with an ISOMETER® IRDH575 or a PGH locating current injector.

The device evaluates locating current signals detected by up to 12 measuring current transformers of the W…, WR… or WS… series. Response sensitivity is adjustable from 2…10 mA. It features a backlit graphical LCD with onboard menu, two common alarm relays with changeover contacts, RS-485 BMS interface supporting up to 90 devices (1080 channels total), history memory for 300 events, continuous CT connection monitoring, and supply voltage DC 16…94 V / AC 16…72 V (42…460 Hz). Power consumption is ≤ 10 VA. The unit mounts on DIN rail or by screws in an XM460 enclosure.

Key Technical Specifications

Detailed Product Overview

The BENDER EDS460-D-1 forms part of an ISOSCAN® insulation fault location system for unearthed IT power supplies. When an insulation monitoring device (IRDH575) or locating current injector (PGH) detects a drop in insulation resistance, it injects a defined locating current. The EDS460-D-1 simultaneously evaluates the signals from up to twelve connected measuring current transformers. Any channel carrying a locating current above the set response threshold (2…10 mA) is identified and indicated on the graphical display; the common alarm relays operate and the alarm LED illuminates.

Parallel scanning of all channels and of multiple networked EDS devices keeps the maximum search time to approximately 10 seconds. Up to 90 EDS modules can share a single RS-485 BMS bus, allowing monitoring of as many as 1080 outgoing circuits in one IT system. Continuous monitoring of the CT connection detects open-circuit or short-circuit conditions on the measuring transformers. An additional residual-current measurement function covers the range 100 mA…10 A.

The D-version provides local control and display functions, including parameter setting for other EDS devices on the same bus, internal clock, and event history. Typical application areas include main and control circuits in industrial installations and ships, diode-decoupled DC systems in power stations, and IT systems serving medical locations. The device operates continuously and can be installed in any orientation.

Engineering Selection Highlights

• Exact match for IT systems monitored by IRDH575 or PGH injectors; the locating current must lie within the 2…50 mA measurement window of the EDS460 series.
• Requires W…, WR… or WS… series measuring current transformers; commercial CTs are not suitable.
• Supply voltage limited to DC 16…94 V or AC 16…72 V (42…460 Hz); select the -2 variant if a higher supply range is needed.
• BMS address range 1…90 and RS-485 interface determine system expandability to 1080 channels.
• Two common changeover alarm relays only; per-channel contacts require the EDS490 series.
• Continuous CT monitoring and history memory support diagnostic and maintenance routines.
• DIN-rail or screw mounting in XM460 enclosure; terminal protection IP20.

EDS460-D-1

EDS460-D-1

System Compatibility & Integration Requirements

Dimensions, Mounting & Connection Notes

The EDS460-D-1 is housed in the XM460 enclosure. Mounting is possible on DIN rail according to IEC 60715 or by two M4 screws. Terminal degree of protection is IP20. Weight is ≤ 360 g. Measuring current transformers connect via two-wire circuits; continuous monitoring detects open or shorted CT connections. Supply and relay terminals accept the usual industrial wiring practices; a 6 A fuse is recommended for the supply (two-pole on IT systems).

FAQ

What is the BENDER -D-1?
It is an ISOSCAN® insulation fault locator that evaluates locating currents from measuring current transformers to identify the faulty circuit in an unearthed IT system.

Which systems does the EDS460-D-1 support?
It is intended for AC, three-phase AC, DC and AC/DC IT systems when used with an IRDH575 or PGH locating current injector.

How many channels can one EDS460-D-1 monitor?
Each device monitors 12 measuring channels; up to 90 devices can be networked via RS-485 BMS for a total of 1080 channels.

What is the response value of the EDS460-D-1?
The adjustable response sensitivity for the insulation-fault location function is 2…10 mA.

Which measuring current transformers are compatible?
Only Bender W…, WR… and WS… series transformers are suitable.

What supply voltage does the EDS460-D-1 require?
DC 16…94 V or AC 16…72 V at 42…460 Hz.

Does the device have a local display?
Yes. The D-version includes a backlit graphical LCD and an onboard menu for parameter setting and status display.

What alarm outputs are provided?
Two common alarm relays, each with one changeover contact.

Verification & Troubleshooting Notes

• Confirm that the locating current injected by the IRDH575 or PGH lies within the measurable range (approximately 1.5…50 mA) of the EDS460 series.
• Verify continuous CT connection monitoring status; an open or shorted transformer circuit lights Alarm LED 1 and operates the common alarm relay.
• Check BMS bus addresses (1…90) and communication integrity if multiple devices are networked.
• Residual currents exceeding 10 A on any channel trigger the residual-current alarm function.
• Use the INFO function on the graphical display to read device type, software versions and set address when contacting technical support.
• Periodic functional tests via the TEST input or menu are recommended; follow the procedures given in the operating manual.