Bender EDS440 Manual de instrucciones

ISOSCAN® EDS440 and EDS441

Insulation fault locator to locate insulation faults in

ungrounded DC, AC and three-phase power supplies

EDS44x_D0020 _ _D_XXEN/ .2023

ISOSCAN® EDS440 and EDS441 Insulation fault locator to locate insulation faults in

ungrounded DC AC and three-phase power supplies

System properties

•Universal system design

•Modular design, therefore easily

adjustable to the given circumstances

•Measuring current transformers

available in various sizes and versions

•CT connection monitoring

•Twelve measuring channels for series

W…, WR…, WS… measuring current

transformers

•Optional extension by twelve relay

channels

•Fault memory behaviour selectable

•Up to 50 EDS insulation fault locators in

the system, 600 measuring channels

•Response sensitivity:

– EDS440…: 2… 0 mA

– EDS44 …: 0.2… mA

•AC residual current measurement with

configurable response value

•Two alarm relays with one n/o contact

each

•n/o or n/c operation selectable

•External test/reset button

•Central display of faulty outgoing

circuits

•Serial interface RS-485, BS bus address

range 2…79

•Connection to higher-level control and

visualisation systems possible.

Intended use

The insulation fault locators ISOSCAN® EDS440 and EDS44 are used to locate insulation

faults in unearthed DC, AC and three-phase power supply systems (IT systems).

Depending on the locating current injector, AC and three-phase systems can be

monitored within the range from AC 42 to 000 V; DC systems, within the range from

DC 24 to 500 V.

An AC residual current can be indicated in these ranges:

•EDS440: 42… 000 Hz, 0. …20 A

•EDS44 : 42…60 Hz, 0. …2 A

An EDS system (insulation fault location system) consists of an EDS44x insulation

fault locator and a locating current injector. EDS44… insulation fault locators detect

locating current signals generated by the locating current injector via measuring current

transformers and evaluate them accordingly.

Intended use also implies

•the observation of all information in the operating manual and

•compliance with test intervals.

In order to meet the requirements of the applicable standards, customised parameter

settings must be made on the equipment in order to adapt it to local equipment and

operating conditions. Please heed the limits of the range of application indicated in the

technical data.

Do not make any unauthorised changes to the device. Only use spare parts and optional

accessories sold or recommended by the manufacturer.

The messages of the device must be perceptible even if it is installed in a control cabinet.

The devices is not designed for use in residential areas and may not provide sufficient

protection for radio reception there.

Any other use than that described in this manual is regarded as improper.

Areas of application

•Insulation fault location in AC, 3(N)AC and DC IT systems

•Main circuits and control circuits in industrial plants and ships

•Diode-decoupled DC IT systems in power plants

•Systems for medical locations

Standards

The standard for unearthed power supplies (IT systems)

DIN VDE 0100-410 (VDE 0100- 410):2018-10 (IEC 60364-4-41:2005, modified + A1:2017,

modified)

requires that the first insulation fault is to be eliminated with the shortest practicable

delay. EDS systems enable fast localisation of this insulation fault.

2 EDS44x_D0020 _ _D_XXEN/ .2023

ISOSCAN® EDS440 and EDS44

Operating principle of the EDS system

When an insulation monitoring device detects an insulation fault,

it starts the insulation fault location.

In the event of a first insulation fault, an undefined residual

current flows in IT systems, which is primarily defined by the

system leakage capacitances and the value of the insulation fault.

The basic idea of insulation fault location is therefore to generate a

defined locating current IL that flows through the insulation fault.

The locating current is driven by the system voltage and can be

located in the faulty outgoing circuit using the measuring current

transformer.

The locating current is generated by the locating current injector.

It is limited in amplitude and time. The amplitude depends on the

size of the existing insulation fault and the system voltage. It is

limited depending on the settings.

The locating current flows from the locating current injector via

the live lines to the insulation fault location taking the shortest

route. From there, it flows through the insulation fault and the

earth conductor back to the locating current injector. This locating

current pulse is detected by the measuring current transformers

on the insulation fault path and signalled by the connected

insulation fault locator.

System variants

The devices ISOSCAN® EDS440 and EDS44 differ depending on their response sensitivity. EDS440 is suitable for main circuits. EDS44

can be used in control circuits and in circuits in medical locations.

-L -S -LAB-4 -LAF-4

EDS440 Channel LED

BS bus

IΔL = 2…10 mA

Main circuits

Digital in uts and out uts

No channel LED

BB bus

IΔL = 2…10 mA

Main circuits

No internal voltage su ly

Channel LED

BS bus

IΔL = 10 mA 2)

Main circuits

Digital in uts and out uts

EDS441 Channel LED

BS-Bus

IΔL = 0.2…1 mA

Control circuits

Digital in uts and out uts

No channel LED

BB bus

IΔL = 0.2…1 mA

Control circuits

No internal voltage su ly

Channel LED

BS-Bus

IΔL = 0.2…1 mA 1)

Control circuits

W…AB current transformers

Digital in uts and out uts

) High response sensitivity with large system leakage capacitances

2) In combination with CTAF...SET series measuring current transformers

EDS44x_D0020 _ _D_XXEN/ .2023 3

ISOSCAN® EDS440 and EDS44

Display elements EDS44…-S

Status LED

ON Flashes: Starting rocess; hourly transformer connection test

Lights u : o erational

Operating and display elements EDS44…-L

-1

>3s

ADDR.

RESET

+10

TEST

CHANNELS / ADDR.

11109

345621

+10 +20 +40

Addr. Mode

∆

ALARM

∆

ALARM

SERVICE

COM/ADDR.

Status LEDs

ON Flashes: Starting rocess; hourly transformer connection

test

Lights u : o erational

COM/ADDR. Flashes quickly: device communicates via RS-485

interface

Flashes: insulation fault location (LED indicate the ulse

of the locating current injector:

ulse = on; ause = off. In LAB rocedure, the ulse can

last one minute.)

SERVICE Lights u : device error; connection fault of the measuring

current transformers; error message e.g. due to low-

frequency residual currents, external magnetic fields, etc.

ALARM IΔL Lights u : main alarm, insulation fault on one of the

measuring channels (EDS function)

ALARM IΔn Lights u : res onse value for residual currents is

exceeded.

Channel LEDs 1 to 12

CHANNELS /

ADDR.

Lights u : insulation fault on the res ective measuring

channel or residual current alarm

Flashes slowly (1 Hz): connection fault of the measuring

current transformer

Flashes quickly (2 Hz): interference during insulation fault

location

Addr. Mode Indication of the resent tens counter by means of the

channel LEDs 10, 11 and 12

Operating buttons

TEST

+10

Starts self test.

In address assignment mode: increase address in ste s of

ten.

RESET

Resets the fault memory. Only ossible if the fault

memory is activated and a fault is no longer detected.

In address assignment mode: increase address in ste s of

one.

ADDR.

–1

Long ress (>3 s): activates the address assignment

mode.

In address assignment mode: decrease address in ste s of

one.

4 EDS44x_D0020 _ _D_XXEN/ .2023

ISOSCAN® EDS440 and EDS44

Connection to the voltage supply

A1 A2

12 3 4 5 6 7 8 9 10 11 12

Us =AC/DC 24...240 V

A1/+ A2/–

L1/+

L2/–

Voltage supply back-up fuse

If the device is supplied via an external power supply unit,

the back-up fuse Fback-up at connection “A /+ A2/−” must be

selected in such a way that the feeding power supply unit is

able to trip the DC-compatible back-up fuse.

Example:

A back-up fuse of 650 mA/T is recommended when using a

24 V power supply unit (min. A).

Connection of the X1 interface (I1 I2 A B M+ ...)

M+

23 24

13 14

OFF ON

I2 A B

A B

M+

I1 In ut 1 M+ dig. current out ut

I2 In ut 2 Ground

ARS-485 A (in ut) ARS-485 A (out ut)

BRS-485 B (in ut) BRS-485 B (out ut)

The EDS44…-L is connected via the X plug.

The EDS44…-S does not feature an X interface and can

only be connected via the BB bus.

Connection of the relays

M+

23 24

13 14

OFF ON

23 24

13 14

13 23

Alarm relay 1 14 n/o contact Alarm relay 2 24 n/o contact

BS bus termination

M+

23 24

13 14

OFF ON

Activating a terminating resistor to define the first and the last

device in the bus system.

OFF All devices between the first

and the last device in the bus

ON First and last device in a bus

Connection of the X2 interface (k1-12/l1-12)

A1 A2

12 3 4 5 6 7 8 9 10 11 12

l 1 l 12l 11l 2 l 10l 9l 8l 7l 6l 5l 4l 3

k 1 k12k11k 2 k10k 9k 8k 7k 6k 5k 4k 3

l1 Measuring current

transformer 1

l2 Measuring current

transformer 2

l3 Measuring current

transformer 3

l4 Measuring current

transformer 4

………

l12 Measuring current

transformer 12

k12

Cable lengths of the measuring current transformers

In tall the mea uring current tran former according to the

in truction in the re pective data heet of the mea uring

current tran former. When connecting, ob erve the maximum

cable length .

EDS44x_D0020 _ _D_XXEN/ .2023 5

ISOSCAN® EDS440 and EDS44

Connection of CTAC… series measuring current transformers

For insulation fault location, the measuring current transformers

of the CTAC… series are used.

A1/+ A2/-

l10

k10

l11

k11

l12

k12

Type A

CTAC 1

CTAC 2

l1 k1 l2 k2

l k l k

CTAC… series measuring current transformers

Terminals and 2 as well as terminals 3 and 4 of the

measuring current transformer are bridged internally.

The connections k and l must not be interchanged on the

EDS44….

Live conductors and measuring current transformers

Ensure that all live conductors are routed through the

measuring current transformer. Do not route any existing

PE conductors or shields of shielded cables through the

measuring current transformer! Standard measuring

current transformers are not suitable for the EDS44…

system and must not be used. An accurate measurement

result can only be obtained when these instructions are

observed.

For further information regarding measuring current

transformers, refer to the respective data sheets.

Connection of CTAF…SET series measuring current

transformers to EDS440-LAF-4

For insulation fault location, the measuring current transformers

of the CTAF…SET series are used.

l10

k10

l11

k11

l12

k12

l1 k1 l2

Typ A

Locating current

The EDS440-LAF-4 operates exclusively with a locating

current > 0 mA.

Connection of measuring current transformer CTBC… to

EDS441-LAB-4

CTXS…

CTBC…

24V GND

1 m

2.5 m

5 m

10 m

50 mm

250 mm

EDS441-LAB STEP-PS

power supply

CTUB102

24V

GND

S1(k)

S2(l)

Locating current

The EDS44 -LAB-4 operates exclusively with a locating

current of max. 25 mA. Therefore, selecting the current

range >500 mA on the current transformer is not suitable

for measuring locating currents <25 mA.

6 EDS44x_D0020 _ _D_XXEN/ .2023

ISOSCAN® EDS440 and EDS44

Connection to a 3(N)AC system

A BA B

iso685-D-P EDS44…-L/-S

USUS

A1/+

A2/-

21 22 24

11 12 14

L1/+

L2 L3/- KE E

iso685

ISOMETER

RX2

l1 l2 l3 A B

EKEL3/-L2

L1/+A1/+ A2/-

EDS440

ISOSCAN

ΔL

Δn

13 14 23 24

l10

k10

l11

k11

l12

k12

l1 l2 A B

A1/+ A2/-

A1/+ A2/- l1 k1 l2 k2

Measuring current transformers

2to the loads

3BB bus for communication to and supply of EDS44…-S

4BS bus for communication from iso685(W)-…-P to EDS44…-L

USConnection of the supply voltage only to EDS44…-L

EDS44x_D0020 _ _D_XXEN/ .2023 7

ISOSCAN® EDS440 and EDS44

Connection to a DC system

A BA B

iso685-D-P EDS44…-L/-S

L+

L–

USUS

A1/+

A2/-

21 22 24

11 12 14

L1/+

L2 L3/- KE E

iso685

ISOMETER

RX2

l1 l2 l3 A B

EKEL3/-L2

L1/+A1/+ A2/-

EDS440

ISOSCAN

ΔL

Δn

13 14 23 24

l10

k10

l11

k11

l12

k12

l1 l2 A B

A1/+ A2/-

A1/+ A2/- l1 k1 l2 k2

Measuring current transformers

2to the loads

3BB bus for communication to and supply of EDS44…-S

4BS bus for communication from iso685(W)-…-P to EDS44…-L

USConnection of the supply voltage only to EDS44…-L

8 EDS44x_D0020 _ _D_XXEN/ .2023

ISOSCAN® EDS440 and EDS44

Connection to an AC system

A BA B

iso685-D-P EDS44…-L/-S

USUS

A1/+

A2/-

21 22 24

11 12 14

L1/+

L2 L3/- KE E

iso685

ISOMETER

RX2

l1 l2 l3 A B

EKEL3/-L2

L1/+A1/+ A2/-

EDS440

ISOSCAN

ΔL

Δn

13 14 23 24

l10

k10

l11

k11

l12

k12

l1 l2 A B

A1/+ A2/-

A1/+ A2/- l1 k1 l2 k2

Measuring current transformers

2to the loads

3BB bus for communication to and supply of EDS44…-S

4BS bus for communication from iso685(W)-…-P to EDS44…-L

USConnection of the supply voltage only to EDS44…-L

EDS44x_D0020 _ _D_XXEN/ .2023 9

ISOSCAN® EDS440 and EDS44

Connection example: ISOMETER® iso685-D-P EDS440-S IOM441-S and EDS440-L

A BA B

A1/+ A2/-

RX2 11 12 14 21 22 24

L1/+

L2 L3/- KE E

l1 l2 l3 A B

iso685

ISOMETER

EDS440

ISOSCAN

ΔL

Δn

l1 l2 A B

13 14 23 24

A1/+ A2/-

l10

k10

l11

k11

l12

k12

EDS440

ISOSCAN

ΔL

Δn

13 14 23 24

l10

k10

l11

k11

l12

k12

IOM441

123144 124104103 1139384 947473 83

6354 644443 533324 341413 23

13 14

UsUs

iso685-D-P EDS44…-S IOM441 EDS44…-L

KEL3/-L2 E

A1/+ L1/+A2/- A1/+ A2/-

l1 k1 l2 k2l1 k1 l2 k2

Communication between iso685-...-P and EDS44...-L runs exclusively via BS bus (RS-485).

0 EDS44x_D0020 _ _D_XXEN/ .2023

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