Bender IRDH275BW-435, IRDH275B, IRDH275, IRDH275-427, IRDH275W-427 User Manual

Manual

EN

ISOMETER®IRDH275

IRDH275B

Insulation monitoring device for IT AC systems
with galvanically connected rectifiers and converters
and for IT DC systems
Software version IRDH275: D160 V1.8

IRDH275_D00122_02_M_XXEN/10.2016

Bender GmbH & Co. KG

Londorfer Str. 65 • 35305 Gruenberg • Germany
Postfach 1161 • 35301 Gruenberg • Germany

Tel.: [phone]
Fax: [phone]

Email: [e-mail]
Web: http://www.bender.de

© Bender GmbH & Co. KG

All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!

Photos: Bender archives and bendersystembau archives.

Table of Contents

1. Important information .................................................................................... 7

1.1 How to use this manual ................................................................................. 7

1.2 Technical support: service and support ................................................... 8

1.2.1 First level support ............................................................................................. 8

1.2.2 Repair service ..................................................................................................... 8

1.2.3 Field service ........................................................................................................ 9

1.3 Training courses ............................................................................................. 10

1.4 Delivery conditions ....................................................................................... 10

1.5 Inspection, transport and storage ........................................................... 10

1.6 Warranty and liability ................................................................................... 11

1.7 Disposal ............................................................................................................ 12

2. Safety instructions ......................................................................................... 13

2.1 General safety instructions ........................................................................ 13

2.2 Work activities on electrical installations ............................................. 13

2.3 Device-specific safety information ......................................................... 14

2.4 Intended use ................................................................................................... 16

2.5 Directions for installation ........................................................................... 17

3. Function ........................................................................................................... 19

3.1 Common characteristics (IRDH275 and IRDH275B) .......................... 19

3.2 Additional characteristics IRDH275B ...................................................... 19

3.3 Product description ...................................................................................... 20

3.4 Function ............................................................................................................ 20

3.5 Additional functions IRDH275B ............................................................... 24

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Table of Contents

4. Connection ..................................................................................................... 29

4.1 Wiring ................................................................................................................ 29

4.2 Wiring diagrams with coupling devices ................................................ 32

4.2.1 Connection with AGH150W-4 .................................................................. 32

4.2.2 Connection with AGH520S ........................................................................ 33

4.2.3 Connection with AGH204S-4 .................................................................... 34

5. Commissioning flow chart (threepart) ...................................................... 37

6. Operation and setting .................................................................................. 41

6.1 Operating features and displays IRDH275(B) ...................................... 41

6.1.1 Display in the standard mode ................................................................... 42

6.1.2 Display in the menu mode ......................................................................... 43

6.1.3 Function keys .................................................................................................. 43

6.2 Menu structure and menu mode ............................................................ 45

6.2.1 Diagram menu structure ............................................................................ 47

6.3 Menu HISTORY INFO (IRDH275B) ............................................................ 48

6.3.1 Diagram HISTORY INFO (IRDH275B) ....................................................... 49

6.4 Menu ISO SETUP: Setting of the basic ISOMETER® functions ........ 50

6.4.1 Response values Alarm 1 and Alarm 2 ................................................... 50

6.4.2 Operating principle of the alarm relays ................................................ 50

6.4.3 Memory setting (on/off) .............................................................................. 53

6.4.4 Current output for external measuring instruments (IRDH275B) 53

6.5 Menu ISO ADVANCED: Setting of the extended functions ........... 54

6.5.1 External coupling devices (AGH: no) ...................................................... 54

6.5.2 Adaptation to the system leakage capacitance

(Cemax: 150 μF) .............................................................................................. 55

6.5.3 Changing the measuring principle from AMP to DC

(Measure: AMP) .............................................................................................. 55

6.5.4 Setting the repetition time for automatic self tests

(Autotest: 24h) ................................................................................................ 55

6.5.5 Setting the real-time clock (Clock) (IRDH275B) .................................. 55

6.5.6 Setting the date (Date) (IRDH275B) ........................................................ 55

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Table of Contents

6.5.7 Specifying the starting time of the automatic self test (Test)

(IRDH275B) ....................................................................................................... 56

6.5.8 Diagram ISO ADVANCED ............................................................................ 57

6.6 Menu COM SETUP: Setting the BMS interface .................................... 58

6.6.1 Bus address „Addr:“ (IRDH275B) ............................................................. 58

6.6.2 ISOnet function (IRDH275B) ...................................................................... 58

6.6.3 ISO monitor (IRDH275B) ............................................................................. 59

6.6.4 Diagram COM SETUP (IRDH275B) ........................................................... 60

6.7 Menu PASSWORD ......................................................................................... 61

6.7.1 Activating and setting the password ..................................................... 61

6.7.2 Diagram PASSWORD .................................................................................... 62

6.8 Menu LANGUAGE .......................................................................................... 63

6.8.1 Setting the national language .................................................................. 63

6.8.2 Diagram Language ....................................................................................... 63

6.9 Menu SERVICE ................................................................................................ 64

6.10 Parameterization via Internet ................................................................... 64

7. Serial interfaces .............................................................................................. 65

7.1 RS485 interface with IsoData protocol (IRDH275) ............................. 65

7.2 RS485 interface with BMS protocol (IRDH275B) ................................ 67

7.3 Topology RS485 network (IRDH275B) ................................................... 68

7.3.1 Correct arrangement ................................................................................... 68

7.3.2 Wrong arrangement .................................................................................... 68

7.3.3 Wiring ................................................................................................................ 68

7.4 BMS protocol (IRDH275B) .......................................................................... 69

7.4.1 BMS Master ...................................................................................................... 69

7.4.2 BMS Slave ......................................................................................................... 70

7.4.3 Commissioning of an RS485 network with BMS protocol .............. 71

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Table of Contents

8. Technical data IRDH275(B) .......................................................................... 73

8.1 Data in tabular form ..................................................................................... 73

8.2 Standards, approvals and certifications ................................................ 77

8.3 Characteristic curves .................................................................................... 78

8.4 Ordering details ............................................................................................. 85

8.4.1 ISOMETER® ....................................................................................................... 85

8.4.2 Coupling devices ........................................................................................... 86

8.4.3 Measuring instruments ............................................................................... 86

INDEX .................................................................................................................... 87

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IRDH275_D00122_02_M_XXEN/10.2016

1. Important information

DANGER

WARNING

CAUTION

1.1 How to use this manual

This manual is intended for qualified personnel working in
electrical engineering and electronics!

Always keep this manual within easy reach for future reference.

To make it easier for you to understand and revisit certain sections in this man­ual, we have used symbols to identify important instructions and information.
The meaning of these symbols is explained below:

This signal word indicates that there is a high risk of danger
that will result in electrocution or serious injury if not
avoided.

This signal word indicates a medium risk of danger that
can lead to death or serious injury if not avoided.

This signal word indicates a low-level risk that can result in
minor or moderate injury or damage to property if not
avoided.

This symbol denotes information intended to assist the user
in making optimum use of the product.

IRDH275_D00122_02_M_XXEN/10.2016

7

Important information

This manual has been compiled with great care. It might nevertheless contain
errors and mistakes. Bender cannot accept any liability for injury to persons or
damage to property resulting from errors or mistakes in this manual.

1.2 Technical support: service and support

For commissioning and troubleshooting Bender offers you:

1.2.1 First level support

Technical support by phone or e-mail for all Bender products

• Questions concerning specific customer applications

• Commissioning

• Troubleshooting

Telephone: [phone]*
Fax: [phone]

In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [e-mail]

1.2.2 Repair service

Repair, calibration, update and replacement service for Bender products

• Repairing, calibrating, testing and analysing Bender products

• Hardware and software update for Bender devices

• Delivery of replacement devices in the event of faulty or incorrectly

delivered Bender devices

• Extended guarantee for Bender devices, which includes an in-house
repair service or replacement devices at no extra cost

Telephone: [phone]** (technical issues)

Fax: [phone]
E-mail: [e-mail]

8

[phone]**, -785** (sales)

IRDH275_D00122_02_M_XXEN/10.2016

Important information

Please send the devices for repair to the following address:

Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Grünberg

1.2.3 Field service

On-site service for all Bender products

• Commissioning, configuring, maintenance, troubleshooting of Bender
products

• Analysis of the electrical installation in the building (power quality test,
EMC test, thermography)

• Training courses for customers

Telephone: [phone]**, -762 **(technical issues)

[phone]** (sales)

Fax: [phone]
E-mail: [e-mail]
Internet: www.bender-de.com

*Available from 7.00 a.m. to 8.00 p.m. 365 days a year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m

IRDH275_D00122_02_M_XXEN/10.2016

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Important information

1.3 Training courses

Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at
www.bender-de.com -> Know-how -> Seminars.

1.4 Delivery conditions

Bender sale and delivery conditions apply.
For software products the "Softwareklausel zur Überlassung von Standard­Software als Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen
Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie"
(software clause in respect of the licensing of standard software as part of de­liveries, modifications and changes to general delivery conditions for prod­ucts and services in the electrical industry) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and Electron­ic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed or elec­tronic format.

1.5 Inspection, transport and storage

Inspect the dispatch and equipment packaging for damage, and compare the
contents of the package with the delivery documents. In the event of damage
in transit, please contact Bender immediately.
The devices must only be stored in areas where they are protected from dust,
damp, and spray and dripping water, and in which the specified storage tem­peratures can be ensured.

10

IRDH275_D00122_02_M_XXEN/10.2016

Important information

1.6 Warranty and liability

Warranty and liability claims in the event of injury to persons or damage to
property are excluded if they can be attributed to one or more of the follow­ing causes:

• Improper use of the device.

• Incorrect mounting, commissioning, operation and maintenance of the

device.

• Failure to observe the instructions in this operating manual regarding
transport, commissioning, operation and maintenance of the device.

• Unauthorised changes to the device made by parties other than the
manufacturer.

• Non-observance of technical data.

• Repairs carried out incorrectly and the use of replacement parts or

accessories not approved by the manufacturer.

• Catastrophes caused by external influences and force majeure.

• Mounting and installation with device combinations not recom-

mended by the manufacturer.

This operating manual, especially the safety instructions, must be observed by
all personnel working on the device. Furthermore, the rules and regulations
that apply for accident prevention at the place of use must be observed.

IRDH275_D00122_02_M_XXEN/10.2016

11

Important information

1.7 Disposal

Abide by the national regulations and laws governing the disposal of this de­vice. Ask your supplier if you are not sure how to dispose of the old equip­ment.
The directive on waste electrical and electronic equipment (WEEE directive)
and the directive on the restriction of certain hazardous substances in electri­cal and electronic equipment (RoHS directive) apply in the European Commu­nity. In Germany, these policies are implemented through the "Electrical and
Electronic Equipment Act" (ElektroG). According to this, the following applies:

• Electrical and electronic equipment are not part of household waste.

• Batteries and accumulators are not part of household waste and must

be disposed of in accordance with the regulations.

• Old electrical and electronic equipment from users other than private
households which was introduced to the market after 13 August 2005
must be taken back by the manufacturer and disposed of properly.

For more information on the disposal of Bender devices, refer to our
homepage at www.bender-de.com -> Service & support.

12

IRDH275_D00122_02_M_XXEN/10.2016

2. Safety instructions

DANGER

2.1 General safety instructions

Part of the device documentation in addition to this manual is the enclosed
"Safety instructions for Bender products".

2.2 Work activities on electrical installations

Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.

Risk of electrocution due to electric shock!

Touching live parts of the system carries the risk of:

• An electric shock

• Damage to the electrical installation

• Destruction of the device

Before installing and connecting the device, make sure

that the installation has been de-energised. Observe the
rules for working on electrical installations.

If the device is used outside the Federal Republic of Germany, the applicable
local standards and regulations must be complied with. The European stand­ard EN 50110 can be used as a guide.

IRDH275_D00122_02_M_XXEN/10.2016

13

2.3 Device-specific safety information

WARNING

CAUTION

CAUTION

Children and unauthorised persons must not have access to
or contact with the ISOMETER®.

Make sure that the operating voltage is correct!

Prior to insulation and voltage tests, the ISOMETER® must be
disconnected from the IT system for the duration of the test.
In order to check the correct connection of the device, a
functional test has to be carried out before starting the
system.

Make sure that the basic settings meet the requirements of
the IT system.

In the event of an alarm message of the ISOMETER®, the
insulation fault should be eliminated as quickly as possible.

If the ISOMETER® is installed inside a control cabinet, the
insulation fault message must be audible and/or visible to
attract attention.

Safety instructions

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IRDH275_D00122_02_M_XXEN/10.2016

Safety instructions

When using ISOMETER®s in IT systems, make sure that only
one active ISOMETER® is connected in each interconnected
system. If IT systems are interconnected via coupling
switches, make sure that ISOMETER®s not currently used are
disconnected from the IT system and deactivated. IT systems
coupled via diodes or capacitances may also influence the
insulation monitoring process so that a central control of the
different ISOMETER®s is required.

Prevent measurement errors!

When a monitored IT system contains galvanically coupled
DC circuits, an insulation fault can only be detected correctly
if the rectifier valves (e.g. rectifier diode, thyristors, IGBTs,
frequency inverters, …) carry a minimum current of > 10 mA.

Unspecified frequency range

When connecting to an IT system with frequency
components below the specified frequency range, the
response times and response values may differ from the
indicated technical data. However, depending on the
application and the selected measurement method,
continuous insulation monitoring is also possible in this
frequency range.
There is no influence on the insulation monitoring for IT
systems with frequency components above the specified
frequency range, e.g. within the range of typical switching
frequencies of frequency inverters (2…20 kHz).

IRDH275_D00122_02_M_XXEN/10.2016

15

Safety instructions

2.4 Intended use

The ISOMETER® is intended for:

• monitoring the insulation resistance of IT systems

Any other use, or any use which goes beyond the foregoing, is deemed to be
use other than for the intended purpose. The Bender companies shall not be
liable for any losses or damage arising therefrom.
Use for the intended purpose also includes

• compliance with all information in the operating instructions, 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.

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

16

IRDH275_D00122_02_M_XXEN/10.2016

Safety instructions

CAUTION

CAUTION

2.5 Directions for installation

Risk of property damage due to unprofessional
installation!

If more than one insulation monitoring device is connected
to a conductively connected system, the system can be
damaged. If several devices are connected, the device does
not function and does not signal insulation faults. Make
sure that only one insulation monitoring device is
connected in each conductively connected system.

Ensure disconnection from the IT system!

When insulation or voltage tests are to be carried out, the
device shall be isolated from the system for the test period.
Otherwise the device may be damaged.

The terminals and KE shall be connected by a separate wire to the pro­tective conductor (PE). If the terminals L1, L2 of the device are connected to a
system under operation, the terminals and KE must not be disconnected
from the protective conductor (PE).

Check proper connection!

Prior to commissioning of the installation, check that the
device has been properly connected and check the device
functions. Perform a functional test using an earth fault via
a resistance that is suitable for the mains voltage.

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Safety instructions

The devices, variant -4.. are delivered with the following factory
setting:

ISO SETUP:

ISO SETUP:

ISO SETUP:

ISO ADVANCED:

COM SETUP:

Please check if the basic setting of the ISOMETER® complies with the require­ments of the system to be monitored.

Alarm 1 / Alarm 2
(response values)

Operating principle K1/K2 = N/O operation

Memory = off

System leakage capacitance = 150 μF

Bus address = 3 (slave)

Prevent measurement errors!

When an AC system being monitored contains galvanically
coupled DC circuits, take into consideration that: an
insulation fault can only be detected correctly when the
rectifier valves carry a minimum current of 5…10 mA.

=40 kΩ / 10 kΩ

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IRDH275_D00122_02_M_XXEN/10.2016

3. Function

3.1 Common characteristics (IRDH275 and IRDH275B)

• ISOMETER® for IT AC systems with galvanically connected rectifiers and
for IT DC systems (IT = unearthed systems)

• The operating range of the nominal voltage U
coupling devices.

• Automatic adaptation to the existing system leakage capacitance

• measuring principle (European Patent: EP 0 654 673 B1)

• Two separately adjustable ranges of the response value1 kΩ…10 MΩ

(Alarm 1, Alarm 2)

• Two-line LC display

• Connection monitoring (monitoring of the measuring leads)

• Automatic device self test

• Option "W":

This option provides: improved shock and vibration resistance for use
in ships, on rolling stock and in seismic environment.

3.2 Additional characteristics IRDH275B

• Memory with real-time clock to store all alarm messages with date and
time stamp.

• BMS interface (BMS protocol) for data exchange with other Bender
devices (RS485 electrically isolated).

• Internal disconnection of the ISOMETER from the IT system to be moni­tored (using a control signal; terminals F1/F2) , e.g. if several
ISOMETERs® are interconnected.

• Current output 0(4)…20mA (galvanically separated) in relation to the
measured insulation value.

• Remote setting of certain parameters via the Internet
(option; COM460 additionally required)

can be extended via

n

IRDH275_D00122_02_M_XXEN/10.2016

19

Function

3.3 Product description

The ISOMETER® type IRDH275 monitors the insulation resistance of IT systems.
It is suitable for universal use in 3(N)AC, AC/DC and DC systems. AC systems
may include extensive DC supplied loads, such as converters or thyristor-con­trolled DC drives. The device automatically adapts itself to the existing system
leakage capacitance.

Suitable coupling devices are available to extend the nominal voltage range

The IRDH275B can be used in combination with a control and indicating de­vice, e.g. PRC1470 version 2 or higher, on the BMS (BMS = Bender Measuring
Device Interface) bus.

Un.

3.4 Function

The ISOMETER® IRDH275 is connected between the unearthed system (IT sys­tem) and the protective conductor (PE).
The response values and other function parameters are set via the function
keys. The parameters are indicated on the LC display and are stored in a non­volatile memory (EEPROM) after the setting is completed.
A microprocessor-controlled pulsating AC measuring voltage is superim­posed on the IT system to be monitored ( measuring principle*).
The measuring cycle consists of positive and negative pulses of the same am­plitude. The period of these pulses depends on the respective system leakage
capacitances and the insulation resistances of the IT system to be monitored.
An insulation fault between the IT system and earth closes the measuring cir­cuit. From the measured current value, the microprocessor calculates the in­sulation resistance which is indicated on the LC display or the external kΩ
measuring instrument.
The measuring time is determined by the system leakage capacitances, the in­sulation resistance, and the system-related interference disturbances. System
leakage capacitances do not influence the measuring accuracy.

20

IRDH275_D00122_02_M_XXEN/10.2016

Function

If the reading is below the selected response values Alarm 1/Alarm 2, the as­sociated alarm relays respond and the alarm LEDs "Alarm 1/2“ light up and the
measuring value is indicated on the LC display (in the event of DC insulation
faults, the faulty supply line is indicated). If the terminals R1/R2 are bridged
(external RESET button [NC contact] or wire bridge), the fault indication will be
stored. Pressing the RESET button, resets the insulation fault message, provid­ed that the currently displayed insulation resistance is at least 25% above the
actual response value when the reset is carried out. The fault memory behav­iou r can also be set in the "ISO S ETUP " men u, by selec ting the s ub menu Mem­ory: on/off.

The connections for external kΩ display supplied by the current output
0…400 μA or 0/4…20 mA (IRDH275B) at M+/M- are galvanically isolated.

*) measuring principle "adaptive measuring pulse", a measuring
principle developed by Bender (European Patent: EP 0 654 673 B1).

Self test

A self test can be carried out manually using the TEST button or automatically.
In order to guarantee high functional reliability, the ISOMETER
vides comprehensive self test functions. After switching the supply voltage
on, all internal measuring functions, the components of the process control
such as data and paramete r memory as well as system and earth connections
are checked using the self test functions. The progress of the self test is indi­cated on the display by a bar graph. Depending on the conditions in the IT sys­tem to be monitored, the self test is running for 15…20 seconds, then the
message "Test ok!" appears on the LC display for approximately 2 seconds.
Then the device returns to normal measuring mode and the current measur­ing value is displayed after the expiry of the measuring time.

®

IRDH275 pro-

IRDH275_D00122_02_M_XXEN/10.2016

21

Function

When a device error or connection fault is found, the message "!Error!" ap­pears on the display, the device fault LED lights up, the relay K2 (21-22-24)
switches and the respective fault message (see table) is indicated. If such a de­vice fault occurs, a self test is started again every minute. If no more malfunc­tion is detected, the fault message is deleted automatically and the device
fault LED extinguishes.

During operation, the self test function can be started by pressing the TEST
button (internal or external). The self test can also be started automatically
every hour or every 24 hours by selecting "ISO ADVANCED: Autotest" menu.
The alarm relays Alarm1/2 only switch after starting the self test function by
pressing the TEST button, that means if an automatic self test has been select­ed, the alarm relays do not switch.

Behaviour of the analogue output

Setting Manual test Automatic test

0-20 mA 20 mA

while test procedure

4-20 mA 20 mA

while test procedure

0 mA
The current value depends
on the insulation value

4 mA
The current value depends
on the insulation value

22

IRDH275_D00122_02_M_XXEN/10.2016

Function

Error

message

System
connection?

Connection
PE?

Device error xInternal device error 1. Press TEST button

Meaning Steps to be taken

No low-resistance
connection of
terminals L1, L2, L3
to the IT system

No low-resistance
connection of the

terminals and
KE to earth (PE)

If the on/off switching of the supply voltage is not possible
for technical reasons, a RESET of the process control can be
carried out by pressing the "ESC“, "RESET“ and "MENU“ key.

9. Check the wiring of terminal L1,
L2 to the IT system

10. Press the test button

11. Switch the supply voltage off
and on.

12. Check the fuses

1. Check wiring of terminal
and KE to earth (PE)

2. Press TEST button

3. Switch the supply voltage off
and on

2. Switch the supply voltage off
and on

3. Contact Bender

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23

Function

3.5 Additional functions IRDH275B

Current output for external measuring instrument

The current output of IRDH275B provides 0(4)…20 mA. The current output is
galvanically isolated from the device electronics and the RS485 interface. The
ISO SETUP menu, on page 50, allows to switch over between 0…20 mA and
4…20 mA.

Real-time clock

The real-time clock serves as a time base for the memory and self test func­tions. At first, the correct time and date must be set in the menu "ISO AD­VANCED". If time and date are not set, a „C“ (clock) is flashing in the standard
display. In the event of a supply voltage failure, time and date will be stored
for at least thirty days.
If the 24 h test is activated in the "ISO ADVANCED" menu, a special time of day
can be selected for the execution of the self test in the menu "TEST: 12:00".
Then a self test will be started automatically once a day exactly at the preset
time. If the 1 h auto test has been selected, the self test is automatically carried
out every full hour.

Interconnected IT systems

When using ISOMETERs® in IT systems, make sure that only one active
ISOMETER
connected via coupling switches, make sure that ISOMETER
used are disconnected and deactivated via a control system. IT systems cou­pled via diodes or capacitances may also influence the insulation monitoring
process. Hence, also in this case a central control of the different ISOMETER
is required.

®

is connected in each interconnected system. If IT systems are inter-

®

s not currently

®

s

24

IRDH275_D00122_02_M_XXEN/10.2016

Function

Function input F1/F2 for connection or disconnection of
IT systems being monitored

The ISOMETER® can be disconnected from the IT system and set to STANDBY
mode with the function input F1/F2. If the input F1/F2 is bridged, the connec­tions L1/L2 are switched off via internal coupling relays, the measuring func­tion is stopped and the message "STANDBY" appears on the display. Software
version 1.4 or higher does not indicate the measured insulation resistance
during the disconnection, but indicates the value > 10 MΩ. Furthermore, the
alarm relays and alarm LEDs no longer provide alarm messages. After opening
the function input F1/F2, the connection to the IT system will be restored and
a completely new measuring cycle for insulation monitoring is started.
With this function, selective disconnection of an IRDH275 in interconnected IT
systems can be carried out via auxiliary contacts of the respective coupling
switch. One coupling switch each in a line-type or ring-type arrangement can
deactivate a subsequent IRDH275. This arrangement guarantees that only
one ISOMETER
arrangement with all coupling switches closed, it can be assumed that all
ISOMETER
BMS address 1) monitors the condition of the function input F1/F2 of all slave
ISOMETER
When all slave ISOMETER
ing function of the Master ISOMETER
the Master are without function in this mode.
Details are shown in the graphic below.

®

is active in each ga lvanically connected system. In a ring-t ype

®

s are deactivated. In order to prevent this, a BMS Master (IRDH275B

®

s.

®

s are in the STANDBY mode, the insulation monitor-

®

and hence the function input F1/F2 of

IRDH275_D00122_02_M_XXEN/10.2016

25

Function

BMS bus (A/B, RS485)

F1/F2

PE PE

PE PE

IT system 1 IT system 2

IT system 3IT system 4

G

G

G

G

Addr. 1

Addr. 2

Addr. 4

Addr. 3

IRDH275B

IRDH275B

IRDH275B

IRDH275B

F1/F2

F1/F2

F1/F2

26

IRDH275_D00122_02_M_XXEN/10.2016

Function

ISOnet Function (COM SETUP)

Select "ISOnet=ON" from the COM SETUP menu to activate this function. This
function is a type of scanning function. The BMS Master activated via the
ISOnet function controls the ISOnet slave devices via the BMS bus. Once an
ISOMETER
ing the insulation resistance is passed on from the ISOnet Master to the next
slave.
While an ISOMETER
in the STANDBY mode. In this way it can be prevented that the ISOMETERs
disturb each other in interconnected systems.
In com par iso n t o th e so lut ion cou pli ng switches and function input F1/F2, the
response time is prolonged, since no continuous measurement takes place.
The advantage is that no auxiliary contacts of a coupling switch are required.
Furthermore, this solution is ideally suited for capacitive IT systems or IT sys­tems connected via diodes.
An ISOnet slave checks whether there is a Master available in the network. If
there is no Master available, the fault message "ISOnet Master?" appears on
the display after approximately 1 hour. Additionally, the LED for device errors
lights and the Relay K2 switches. When the ISOnet function is activated, the
function input F1/F2 will be disconnected.

®

has finished its measurement cycle, the authorization for measur-

®

is carrying out a measurement all other ISOMETER®s are

®

IRDH275_D00122_02_M_XXEN/10.2016

27

Function

BMS bus (A/B, RS485)

PE PE

PE PE

IT system 1 IT system 2

IT system 3IT system 4

G

G

G

G

Addr. 1

Addr. 2

Addr. 4

Addr. 3

IRDH275B

IRDH275B

IRDH275B

IRDH275B

28

IRDH275_D00122_02_M_XXEN/10.2016

4. Connection

DANGER

Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.

Risk of electrocution due to electric shock!

Touching live parts of the system carries the risk of:

• An electric shock

• Damage to the electrical installation

• Destruction of the device

Before installing and connecting the device, make sure

that the installation has been de-energised. Observe the
rules for working on electrical installations.

4.1 Wiring

Connect the terminals A1/+ and A2/- to the supply voltage US in accordance
with IEC 60364-4-43. The connections to the supply voltage shall be provided
with protective devices to afford protection in the event of a short circuit
(a 6 A fuse is recommended).
For UL and CSA applications, the use of 5 A fuses is mandatory.

Devices for protection against short-circuit in conformity with IEC 60364-4-43
for the IT system coupling L1/L2 can be omitted if the wiring is carried out in
such a manner as to reduce the risk of a short-circuit to a minimum (a short­circuit-proof and earth-fault-proof wiring is recommended).

IRDH275_D00122_02_M_XXEN/10.2016

29

Connection

L1
L2
L3

2

3

4

5

U

n

3 AC - System

L2

L1

L+

L-

DC - System

L2L1

U

n

L1

L2

AC - System

L2L1

U

n

-

/~

+/~

PE

A1/+ A2/- L1 L2 AK KE

T1 T2 R1 R2 F1 F2 M+ M- A B 11 12 14 21 22 24

IRDH275(B)

mA

120W

K1

K2

1

6

7 8 9 10 11 12 13

U

s

U

n

L1
L2
L3

3/N AC - System

L2L1

N

Only one ISOMETER® may be connected to an external TEST or RESET button.
A galvanic parallel connection of several TEST and RESET inputs for collective
testing of ISOMETER

®

s is not permitted.

External coupling devices connected via the terminal AK cannot be switched
off via the internal coupling relays. If no coupling device is used, the terminal
AK remains free.

30

IRDH275_D00122_02_M_XXEN/10.2016

Connection

Legend to wiring diagram:

Supply voltage Us (see nameplate) via 6 A fuse

1

For UL and CSA applications, the use of 5 A fuses is mandatory

Connection to the 3AC system to be monitored:

2, 3

connect terminals L1, L2 to neutral conductor N or
terminals L1, L2 to conductor L1, L2

Connection to the AC system to be monitored:

4

connect terminals L1, L2 to conductor L1, L2

Connection to the DC system to be monitored:

5

connect terminal L1 to conductor L+, terminal L2 to conductor L-

6

Separate connection of and KE to PE

External TEST button (NO contact)

*7

External RESET button (NC contact or wire jumper),

*8

when the terminals are open, the fault message will not be stored

STANDBY by means of the function input F1, F2:

*9

When the contact is closed, insulation measurement does not take
place;
system disconnection

IRDH275: current output, galvanically separated: 0…400 μA

10

IRDH275B: current output, galvanically separated:
0…20 mA or 4…20 mA

Serial interface RS485 (termination 120 Ω resistor)

11

Alarm relay 1; changeover contacts provided

12

Alarm relay 2; (device fault relay) changeover contacts provided

13

The terminal pairs 7, 8 and 9 must be wired galvanically isolate

*

and must not have a connection to PE !

IRDH275_D00122_02_M_XXEN/10.2016

31

Connection

L+

L­PE

U

n

DC 0 ... 1760 V

IRDH275

KE

AK

Achtung Hochspannung

Danger High Voltage

AGH150W-4

AK160

+ -

4.2 Wiring diagrams with coupling devices

Please observe the settings in the "ISO ADVANCED AGH“
menu ! Adapt the settings to the coupling device to be used.

4.2.1 Connection with AGH150W-4

Connected to the ISOMETER® this coupling device extends the nominal volt­age range to DC 1760 V in DC systems.

32

IRDH275_D00122_02_M_XXEN/10.2016

4.2.2 Connection with AGH520S

2

534

AGH520S

PE

IRDH275

L1

L2
L3

Un

3/(N)/ AC 0...7200 V 42...460 Hz

N

3 AC

3/N/ AC

KE

AK

Connected to the ISOMETER® this coupling device extends the nominal volt­age range to AC 7200 V in pure AC systems. In case of 3 AC systems, Pin 2 of
AGH520S is to be connected to L1, in case of 3/N/AC systems, Pin 2 is to be
connected to the N-conductor.

IRDH275_D00122_02_M_XXEN/10.2016

33

Connection

L1
L2
L3

PE

Un

N

AGH204S-4

1

2

AK160

AK80

U3

V3

W3

IRDH275

KE

AK

4.2.3 Connection with AGH204S-4

This coupling device extends the nominal voltage range of ISOMETER®s used
in AC systems including rectifiers.

1

without rectifiers

2

with rectifiers

34

= 3AC 0….1650 V (DC max. 1000 V)

U

n

U

= 3AC 0….1300 V (max. AC voltage; max. DC vol-

n

tage after
quency converters:1840 V)

rectifiers in intermediate circuits of fre-

IRDH275_D00122_02_M_XXEN/10.2016

Connection

The maximum DC voltage is the voltage permitted to occur in the AC part of
an IT system to PE when the IRDH275 is coupled with AGH204S-4 in this part
of the system. This voltage is dependent on the level of the nominal voltage,
the type of rectification 6 pulse, 12 pulse,…), the type of converter intermedi­ate circuit (current… or voltage…), and the converter technology. In case of
converters, the maximum DC voltage in the intermediate circuit usually corre­sponds to the phase-to-phase voltage of the supplying AC system multiplied
by 1.414. In case of current-controlled intermediate circuits of frequency con­verters, higher DC voltages are to be expected.

The given voltage values for AC/DC systems take into account values found by
previous experience (factor 1.414 between DC voltage and AC voltage).
The maximum DC voltage in case of insulation faults in the DC part of the IT
system, for example converter intermediate circuit, is DC 1840 V. From this,
the maximum nominal AC voltage is calculated:

U

= DC 1840 V / 1.414 = AC 1300 V

max

IRDH275_D00122_02_M_XXEN/10.2016

35

Connection

36

IRDH275_D00122_02_M_XXEN/10.2016

5. Commissioning flow chart (threepart)

Is the system to be monitored an
unearthed system (IT system)?

The IRDH275 is not suitable for this
application( contact BENDER).

Un is too high for direct
connection. A coupling device
providing the respective voltage
range must be connected.

Device connection Optional device

connection

no

no

yes

The terminals L1 and L2 must be
connected to Un of the system to be moni­tored according to the wiring diagram.

An external kW measuring instrument
at M+/M- with a display range of
10 kW...1000 kW,
Scale centre point: 120 kW

Output current IRDH275: 0...400 mA
Output current IRDH275B: 0/4...20 mA

Connect the supply voltage Us
to the terminals A1/+ and A2/-. Consider
the details indicated on the nameplate.

External TEST button (NO contact) to the
terminals T1 and T2

External RESET button (NC contact) to the
terminals R1 and R2

The output contacts of the alarm relays
System fault (21-22-24)
Alarm 1 (11-12-14)
Alarm 2 (21-22-24)

When using the RS485 interface, take care
that a 120 W resistor is connected at
the beginning and the end of the network.

13

12

11

7

8

10

Deenergize the installation

before connecting the device!

Recommended wire cross section of

connecting cable

single wire 0.2...4 mm

2

flexible 0.2... 2.5 mm

2

Is the maximum nominal voltage
U

n

AC 793 V

or Un

DC 650 V

yes

The two PE connections

and KE must
be connected separately to the
equipotential bonding.

6

2
3
4
5

1

The encircled figures in the flow chart correspond to the figures in the legend
to the wiring diagram.

Commissioning of the ISOMETER® (1)

IRDH275_D00122_02_M_XXEN/10.2016

37

Commissioning of the ISOMETER® (2)

Commissioning flow chart (threepart)

38

IRDH275_D00122_02_M_XXEN/10.2016

Commissioning flow chart (threepart)

In order to check the proper

connection, a functional test

using a resistance that is

suitable for the mains voltage

is to be carried out.

Size of the resistance:

50% of the present

response value Alarm2.

Commissioning of the ISOMETER® (3)

IRDH275_D00122_02_M_XXEN/10.2016

39

Commissioning flow chart (threepart)

40

IRDH275_D00122_02_M_XXEN/10.2016

6. Operation and setting

6.1 Operating features and displays IRDH275(B)

INFO key: to query standard information /

1

ESC key: back (menu function), confirmation parameter change
TEST button: to call up the self test /

2

Up key: parameter change, moving up in the menu
RESET button: to delete insulation fault alarms

3

Down key: parameter change, moving down in the menu
MENU key: to activate the menu system /

4

Enter key: confirmation parameter change
Alarm LED 1 lights: insulation fault, first warning level reached

5

Alarm LED 2 lights: insulation fault, second warning level reached

6

Device fault LED lights: IRDH275 defective

7

Two-line display for standard and menu mode

8

A detailed description of the operating elements is given on the following
pages.

IRDH275_D00122_02_M_XXEN/10.2016

41

6.1.1 Display in the standard mode

1

3

4

Insulation Fault
Rs=011k

W . H

Indication of the insulation resistance in kΩ

1

Additional information about the insulation resistance:

2

"+" = insulation fault at L+
"–" = insulation fault at L–
"s" = new measurement has started

= polarity of the measuring pulse

3

. = valid bus communication signals

H = new entry in the memory data base
C = flashing, clock is to be set

Messages:

4

- Insulation fault

- Connection system?

- Connection PE?

- Device error x

- *****STAND BY*****

Operation and setting

42

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

1. EXIT

2. HISTORY INFO

INFO

ESC

6.1.2 Display in the menu mode

Parameter change is
permitted

Parameter change is blocked,
enabling by a password

6.1.3 Function keys

Two functions are assigned to each function key. In addition to the basic func­tion marked with a circle, all the keys allow navigation within the menu.

Pressing the INFO key provides the following information
without opening the menu:

• Device name, firmware version

• Response values Alarm 1 and Alarm 2

• Leakage capacitance C

resistances > 20 kΩ)

• Setup status (for details refer to the table of the status
numbers on page 83)

• COM-Setup (IRDH275 bus address)

Please have the details above on hand if you have a problem and if you con­tact Bender for technical questions.

(only indication if insulation

e

IRDH275_D00122_02_M_XXEN/10.2016

43

Operation and setting

TEST RESET

MENU

TEST

RESET

Activating the TEST button starts the
ISOMETER

®

self test.

Pressing the RESET button resets insula­tion fault alarms stored in the ISOMETER

The memory function is only available af­ter activating the fault memory in the ISO SETUP menu or after bridging the
terminals R1/R2. Furthermore, the ISOMETER

®

can only be reset when the

present insulation value is 25 % higher than the set response value.

The menu system is called up by pressing the MENU key.

For controlling the menu system, the arrow keys, the ENTER key and the ESC
key are used:

Arrow up key:
Moving up in the menu, increasing a parameter

Arrow down key:
Moving down in the menu, reducing a parameter

®

.

44

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

MENU

INFO

ESC

ESC

ENTER key
Selecting a menu item or sub menu item, confirming or stor­ing a parameter change and going back to the associated sub
menu item or going to the next input area.

ESC key:
Returning from a sub menu to the previous menu.

If you do not quit the menu, the device automatically returns
to the standard mode again after approximately five minutes.

For the sake of clarity, the following symbols are used for the functions
ENTER, UP/DOWN and ESCAPE in the menu diagrams of this operating
manual:

6.2 Menu structure and menu mode

Switchover to the menu mode

After pressing the MENU key, you can change from the standard mode to the
menu mode. From the menu mode you can link to the different sub menus.

IRDH275_D00122_02_M_XXEN/10.2016

45

Operation and setting

Navigation within the menu

Select the desired menu item using the UP/DOWN keys. The selected menu
item is indicated by a flashing cursor. Press the ENTER key to open the associ­ated sub menu.
Use the UP/DOWN keys again to select the desired parameters. Move the cur­sor to the edit field by pressing the ENTER key.
If you have reached the end of the main menu list, it will be indicated by the
"Arrow UP" symbol.

Changing the parameters

When password protection is activated, indicated by the symbol "padlock
closed" , the first thing to enter is the correct password before the param­eters can be changed using the UP/DOWN keys. Entering the correct pass­word once allows all parameters to be changed as long as you do not leave
the menu.

Changing the parameter usually has an immediate effect on the measuring
and alarm functions. The changed parameter is stored in a volatile memory by
pressing the ENTER or ESC key after returning to the sub menu (flashing cursor
in column 1). During menu operations, all measuring and alarm functions car­ry on working as usual in the background.

Changing from the menu mode to the standard mode

Pressing the ESC key allows fast changing from the menu mode to the stand­ard mode. Thus, the menu item "EXIT" need not to be activated. Automatic
switchover from the menu mode to the standard mode takes place when no
key is pressed for approximately 5 minutes in a main or sub menu.

46

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. AGH : no

3. Ce max: 150 µF

4. Measure: AMP

5. Autotest: 24h

6. Clock: 19:08

7. Date: 01.01.01

8. Test: 00:00

1. Exit

2. Alarm1 040 kW

3. Alarm2 010 kW

4. K1 : N.O

5. K2 : N.O

6. Memory: on

7. M+/M-: 0-20 mA

Nr.: 01 #Nr.: 02

Power on

1. Exit

2. Addr: 003

3. ISONet: off

4. ISO Monitor

Insert Service
Password: XXX

ISO ADVANCEDISO SETUPHISTORY INFO COM SETUP SERVICE

1. Exit

2. Password: XXX

3. Status: off

PASSWORD

1. Exit

2. Text: Deutsch

LANGUAGE

IRDH275B

IRDH275

ESC

*** IT-SYSTEM ***
R >010 MW H

ESC

MENU

6.2.1 Diagram menu structure

IRDH275_D00122_02_M_XXEN/10.2016

47

Operation and setting

Data record Event Display indication

1 Switch the supply voltage on Power On
2 Lowest measured insulation value Rmin

3...99 Response value Alarm 1 released

Alarm1

3...99 Response value Alarm 1 cleared

Alarm1

3...99 Response value Alarm 2 released

Alarm2

3...99 Response value Alarm 2 cleared

Alarm2

3...99 Error system connection released

System connection?

3...99 Error system connection cleared

System connection?

3...99 Error PE connection released

PE connection?

3...99 Error PE connection cleared

PE connection?

3...99 Device error released

Device error

3...99 Device error cleared

Device error

3...99 System reset (watchdog) System reset

6.3 Menu HISTORY INFO (IRDH275B)

99 events with date and time stamp can be stored in the memory database.
The database is designed as a ring memory, i.e. the eldest entry is overwritten.
Data is written into a non-volatile memory and therefore provides protection
against voltage failure.

Before storing the events with the actual date and time stamp, set the real­time clock in the ISO ADVANCED menu (refer to page 57).
The following function keys are provided to query data from the "HISTORY IN­FO" menu: the UP/DOWN keys to change the data record number, the ENTER
key to change from the data record number to the menu item "Clear all:on" to
delete the memory storage, and the ESC key to leave the menu.
A new entry into the memory is signalled with an "H" on the display in the
standard mode. The "H" will be deleted as soon as the "HISTORY INFO" menu
is called up.

48

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

Nr.: 01 #Nr: 08

Power on

Nr.: 01 #Nr: 08

Clear all: off

Nr.: 01 #Nr: 08

28.08.01 17:43

Nr.: 02 #Nr: 08

Clear all: off

Nr.: 02 #Nr: 08

Rmin: 010k

Nr.: 02 #Nr: 08

25.08.01 10:13

Nr.: 02 #Nr: 08

Clear all: off

Nr.: 02 #Nr: 08

Clear all: off

ESC

IRDH275

IRDH275B

*** IT-SYSTEM ***
R >010 MW H

6.3.1 Diagram HISTORY INFO (IRDH275B)

IRDH275_D00122_02_M_XXEN/10.2016

49

Operation and setting

6.4 Menu ISO SETUP: Setting of the basic ISOMETER®

functions

All alarm functions such as Alarm 1 and Alarm 2 (prewarning and main alarm),
the operating principle of the alarm relays K1 and K2 (N.O = N/O operation,
N.C = N/C operation), the fault storage behaviour and a selection of two cur­rent output ranges are set in this menu.

6.4.1 Response values Alarm 1 and Alarm 2

The response values Alarm 1 and Alarm 2 are selected with the UP/DOWN
keys and stored with the ENTER key.

6.4.2 Operating principle of the alarm relays

K1/K2 are factory set to N.O Test, that means N/O operation. When the supple­ment "Test" has been selected, the alarm relays switch over during a manual
self test.
If, for any reason, the alarm relays may not switch over during a manual self
test, the settings N.C or N.O are to be selected.

50

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

K1: N.C Test = N/C operation contacts 11-12-14, with relay test

K1: N.O Test = N/O operation contacts 11-12-14, with relay test

K1: N.C = N/C operation contacts 11-12-14, without relay test

K1: N.O = N/O operation contacts 11-12-14, without relay test

K1: Flash = Flashing function contacts 11-12-14

K2: N.C Test = N/C operation contacts 21-22-24, with relay test

K2: N.O Test = N/O operation contacts 21-22-24, with relay test

K2 : N.C = N/C operation contacts 21-22-24, without relay test

K2 : N.O = N/O operation contacts 21-22-24, without relay test

K2 : Flash = Flashing function contacts 21-22-24

(the alarm relay is energized during normal operation)

(the alarm relay is deenergized during normal operation)

(the alarm relay is energized during normal operation)

(the alarm relay is deenergized during normal operation)

(the alarm relay and the LED flash in the event of an alarm

message, approximately 0.5 Hz

(the alarm relay is energized during normal operation)

(the alarm relay is deenergized during normal operation)

(the alarm relay is energized during normal operation)

(the alarm relay is deenergized during normal operation)

(the alarm relay and the LED flash in the event of an alarm
message, approximately 0.5 Hz)

IRDH275_D00122_02_M_XXEN/10.2016

51

Diagram ISO SETUP

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. Alarm1: 100 KW

3. Alarm2: 200 KW

4. K1 : N.O

5. K2 : N.O

6. Memory: off

7. M+/M-: 0-20 mA

Alarm1 : 100 KW

Alarm2 : 200 KW

K1: N.O

K2: N.O

Memory: off

M+/M-: 0-20 mA

K1: N.O Test
K1: N.C Test
K1: Flash
K1: N.O
K1: N.C

Memory: on
Memory: off

M+/M-: 0-20 mA
M+/M-: 4-20 mA

IRDH275B

IRDH275

*** IT-SYSTEM ***
R >010 MW H

Operation and setting

52

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

RF =

20 mA x 120 kW

I

- 120 kW

RF =

16 mA x 120 kW

I - 4 mA

- 120 kW

During the automatic self test, the alarm relays are not
switched over.

When a device fault occurs at the ISOMETER®, the relay K2
will automatically be activated as a device fault relay.

6.4.3 Memory setting (on/off)

Memory: on = Fault memory is activated

The device must be reset with the RESET button after

Memory: off = Fault memory deactivated (factory setting)

clearing the fault.

6.4.4 Current output for external measuring instruments (IRDH275B)

Factory setting: 0…20 mA
The current output of the IRDH275 can be set to "0…20 mA" or "4…20 mA" via
the menu point "M+/M-:". The maximum load is 500 Ω.

Function 0…20 mA:
R

= insulation fault, I= current in mA

F

Function 4…20 mA:

= insulation fault, I= current in mA

R

F

The associated characteristic curves are illustrated on page 81.

IRDH275_D00122_02_M_XXEN/10.2016

53

Operation and setting

6.5 Menu ISO ADVANCED: Setting of the extended functions

6.5.1 External coupling devices (AGH: no)

Basic setting "no", when no coupling device is used (factory setting).

AGH: 204 AK80

Terminal AK of the IRDH275 is connected to terminal AK80 of the
AGH204S-4. The nominal voltage range is extended to 3AC 0…1650 V. Only
current converters with an output voltage not exceeding DC 1000 V are al­lowed to be connected (see "operation with coupling device" on page 34).

AGH: 520S

Terminal AK of the IRDH275 is connected to terminal 5 of the AGH520S. The
nominal voltage range is extended to AC 0…7200 V. Only current converters
wi th an out put v olt age n ot e xce edin g DC 1 000 V ar e all owe d to b e co nnec ted .

AGH: 204 AK160

Terminal AK of the IRDH275 is connected to terminal AK160 of the
AGH204S-4. The nominal voltage range is extended to 3AC 0…1300 V. Only
current converters with an output voltage not exceeding DC 0…1840 V are al­lowed to be connected (see page 34).

AGH: 150 AK160

Terminal AK of the IRDH275 is connected to terminal AK160 of the
AGH150W-4. The nominal voltage range is extended to DC 0…1760 V.

54

The coupling monitoring is deactivated when an external
coupling device is connected.

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

6.5.2 Adaptation to the system leakage capacitance

(Cemax: 150 μF)

This menu allows to adapt the ISOMETER® to the maximum system leakage ca­pacitance (max. 500 μF). Please note that the basic measuring time will be in­creased to approximately 10 seconds when the setting is C
setting = 150 μF.

= 500 μF. Factory

e

6.5.3 Changing the measuring principle from AMP to DC (Measure: AMP)

The DC measuring principle is only suitable for pure AC systems.
Factory setting = AMP.

6.5.4 Setting the repetition time for automatic self tests (Autotest: 24h)

The time for the repetition of automatic self tests can either be set to 1 hour
or to 24 hours or can be deactivated.
Factory setting = 24 h

6.5.5 Setting the real-time clock (Clock) (IRDH275B)

The setting of the real-time clock is the time base for the memory and for the
automatic self test. In case of failure of the supply voltage, the real-time clock
keeps running for approximately 30 days. When the device will be switched
on after this period, a flashing "C" appears on the display and the clock has to
be set again.

6.5.6 Setting the date (Date) (IRDH275B)

As well as the time, the date is required for the memory, too. In the event of
power supply failure, the date function is not influenced for at least 30 days. If
the device is switched on again after this period, a new setting of date and
time of the real-time clock is required.

IRDH275_D00122_02_M_XXEN/10.2016

55

Operation and setting

6.5.7 Specifying the starting time of the automatic self test (Test) (IRDH275B)

If the 24h self test is activated in the ISO ADVANCED menu, it is possible to set
the time (hour) when the self test is to be carried out by means of the "TEST:
12:00" sub menu. Then the self test is automatically carried out once a day at
a given time. If the 1 hour auto test has been selected, the self test will be car­ried out at every full hour.

56

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. AGH: no

3. Ce max : 150µF

4. Measure: AMP

5. Autotest: 24h

6. Clock: 21:09

7. Date: 01.01.01

8. Test: 12:00

AGH: no

Ce max : 150µF

Autotest: 24h

no
150 AK160
204 AK160
520S
204 AK80

150µF
500µF

24h
no
01h

Clock: 21:09

Date: 01.01.01

Test: 00:00

00:00

.
.
.

23:00

IRDH275B

IRDH275

Measure: AMP

DC
AMP

*** IT-SYSTEM ***
R >010 MW H

6.5.8 Diagram ISO ADVANCED

IRDH275_D00122_02_M_XXEN/10.2016

57

Operation and setting

6.6 Menu COM SETUP: Setting the BMS interface

6.6.1 Bus address „Addr:“ (IRDH275B)

This menu item is used to set the BMS bus address of the IRDH275. Since there
are several ISOMETERs in one system, take care that the bus address is not as­signed twice.
The device is factory set to address 3 and hence acts as a slave.

If several IRDH275 are operated on one BMS bus, the
addresses of other ISOMETER

®

s must be assigned one after

the other, since only one device may represent the Master.

6.6.2 ISOnet function (IRDH275B)

In the ISOnet = ON sub menu of the COM SETUP, the ISOnet function can be
set. The ISOnet function of all ISOMETERs existing in the system must be in
"ON" position.
A BMS Master with the ISOnet function activated, controls the ISOnet slave de­vices via the BMS bus. If an ISOMETER
the permission for insulation measurement is given from the ISOnet Master to
the next slave. During the measurement process carried out by an ISOMETER
all other ISOMETER

®

s are in the STANDBY mode.

58

®

has completed the measuring cycle,

IRDH275_D00122_02_M_XXEN/10.2016

®

,

Operation and setting

<<Bus SCANNING>>
R= K ADR:02

!!!!NO DATA!!!!
R= K ADR:02

Insulation Fault
R= 010K ADR:03

6.6.3 ISO monitor (IRDH275B)

This function allows to query the current measured value as well as the mes­sages of all bus-capable ISOMETERs existing in the BMS network. After select­ing the bus address, the entire information stored by the selected device is
indicated on the display. The display indication is structured similar to the
standard indication, but instead of the indication of the measuring pulse, the
selected bus address is indicated. Without pressing a key, the indication
changes to the standard indication of the IRDH275B after about five minutes.
If there is no information available from the selected ISOMETER
"!!!!NO DATA!!!!" will be displayed.

Information is being searched

No data found

Current data address 03

®

, the message

IRDH275_D00122_02_M_XXEN/10.2016

59

6.6.4 Diagram COM SETUP (IRDH275B)

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. Addr: 003

3. ISONet: off

4. ISO Monitor

Addr : 003

ISONet : off

! ! ! ! NO DATA ! ! ! !
R= ADR: 01

ISONet : off
ISONet : on

ADR: 01

.
.
.

ADR: 30

ADR: 001

.
.
.

ADR: 030

IRDH275B

IRDH275

*** IT-SYSTEM ***
R >010 MW H

Operation and setting

60

IRDH275_D00122_02_M_XXEN/10.2016

Operation and setting

6.7 Menu PASSWORD

6.7.1 Activating and setting the password

This menu can be used to activate a "Password" query. This protects the
ISOMETER
password (menu item 2. Password: xxx) can be set with the UP/DOWN keys
and confirmed with the ENTER key. The password can be activated in the
menu item "3. Status: on" by clicking the ENTER key. The basic setting is
"3. Status: off", that means that the password is deactivated.

®

against unauthorized settings and modifications. The desired

IRDH275_D00122_02_M_XXEN/10.2016

61

6.7.2 Diagram PASSWORD

*** IT-SYSTEM ***
R >010 M

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. Password: XXX

3. Status: off

Status: off

Password: XXX

Status: off
Status: on

Password: XXX
Password: 000
Password: . . .
Password: 999

Operation and setting

62

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Operation and setting

*** IT-SYSTEM ***
R >010 M

1. EXIT

2. HISTORY INFO

3. ISO SETUP

4. ISO ADVANCED

5. COM SETUP

6. PASSWORD

7. LANGUAGE

8. SERVICE

1. Exit

2. Text: Deutsch

2. Text: Deutsch

2. Text: Deutsch

2. Text: English

6.8 Menu LANGUAGE

6.8.1 Setting the national language

The menu item "Language" allows fault messages of the ISOMETER® to be set
to different languages. There is the choice of German and English.
The device menu is not influenced by the language selection.

6.8.2 Diagram Language

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63

Operation and setting

6.9 Menu SERVICE

This menu item is provided for the Bender service personnel and is protected
by a password against erroneous settings. It is intended to provide fast fault
clearance by qualified experts in the event of a device error.

6.10 Parameterization via Internet

The parameters of an IRDH275B indicated below can be checked and set from
a remote place of use by using a personal computer. In addition, a browser
(viewing program for Internet application) and the BMS-Ethernet-Gateway
COM460 are required.
Remote setting is possible for:

• Response value Alarm 1 (1…10,000 kΩ) (Y1)

• Response value Alarm 2 (1…10,000 kΩ) (Y2)

• Operating principle alarm relay 1 (e.g. N/O operation)

• Operating principle alarm relay 2 (e.g. N/O operation)

• Measuring principle (AMP or DC)

• Current output ranges for external measuring instruments

(0/4…20 mA)

• Maximum system leakage capacitance (150 μF or 500 μF)

• Time for repetition of the automatic self test (off/ 1 h/ 24 h

• Starting time of the automatic self test (0.00…23.00 h)

• Language of the alarm messages to be displayed (D, GB)

• Setting the fault memory to ON or OFF

64

IRDH275_D00122_02_M_XXEN/10.2016

7. Serial interfaces

The ISOMETER®s IRDH275 and IRDH275B have differently designed serial in­terfaces.

- RS485 and IsoData protocol

IRDH275

IRDH275B

7.1 RS485 interface with IsoData protocol (IRDH275)

Data transmission is continuously carried out and can neither be interrupted
by the data slave station nor be influenced in any other way. This protocol
cannot be used in combination with the BMS protocol.
For data evaluation via PC or Laptop, the terminal software "IsoData" and an
interface converter of the ASCII-RS485/RS232 type is required.

Interface data:

• RS485 interface galvanically isolated from the device electronics

• Connection to terminal A and B

• Maximum cable length 1200 m

• Transmission protocol 9600 baud - 1 start bit - 1 stop bit - 8 data bit

• After each valid measurement, the following data block is provided:

- galvanically isolated

- ASCII, unidirectional

- RS485 and BMS protocol

- galvanically isolated

- ASCII, bidirectional

IRDH275_D00122_02_M_XXEN/10.2016

65

Serial interfaces

02H0FH30H30

H

30H31H32H38

H

0FH30H30

H

30H30H36H30H0F

H

30H30

H

30H31H32H30

H

0FH30H0FH30

H

0FH30H0FH03

H

Start US= Unit separator

US US

US US

US US End

Measuring value

e.g. 128 kW

Response value

Alarm1 e.g. 60 kW

Response value

Alarm2 e.g. 120 kW

30

H

= No alarm

31

H

= Alarm1
32H = Alarm2
33

H

= Alarm1/2

30H = K1 off, K2 off

31

H

= K1 on, K2 off
32H = K1 off, K2 on
33H = K1 on, K2 on

30

H

= AC fault

31

H

= DC- fault

32H = DC+ fault

10H13

H

LF CR

Example: terminal display

Measuring value

128 KW

Alarm1

60 KW

Alarm2
120 KW

AC fault

Alarm2

K1 off, K2 on

66

IRDH275_D00122_02_M_XXEN/10.2016

Serial interfaces

AB AB AB

1st device ... device last device

120 W

0.4 W

120 W

0.4 W

Stub feeder
maximum 1 m

Maximum length of the RS485 bus: 1200 m

7.2 RS485 interface with BMS protocol (IRDH275B)

The RS485 interface galvanically isolated from the device electronics and cur­rent output serves as a physical transmission medium for the BMS protocol. If
several IRDH275B or other bus-capable devices are interconnected in a net­work via the BMS bus, the BMS bus must be terminated at both ends with a
120 Ω resistor.
An RS485 network that is not terminated, is likely to get instable and may re­sult in malfunctions. Only the first and the last device in one line may be ter­minated. Devices in between must not be terminated with 120 Ω. Hence, stub
feeders in the network must not be terminated. The length of the stub feeders
is restricted to 1 meter.

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67

Serial interfaces

DI1

1

32

33

64

7.3 Topology RS485 network (IRDH275B)

The optimum topology for the RS485 network is a daisy-chain connection. In
this connection, device 1 is connected to device 2, device 2 to device 3,
device 3 to device n etc. The RS485 network represents a continuous path
without branches.

7.3.1 Correct arrangement

Three examples for correct arrangement:

7.3.2 Wrong arrangement

Three examples for wrong arrangement:

7.3.3 Wiring

A suitable type of cable for the wiring of the RS485 network is:
screened cable, core diameter 0.6 mm
(e.g. J-Y(St)Y 2 x 0.6), screen on one side connected to earth (PE).
Connection to the terminals A and B.
The number of bus nodes is restricted to 32 devices. When more devices are
to be connected, Bender recommends to use an RS485 repeater DI1.

68

IRDH275_D00122_02_M_XXEN/10.2016

Serial interfaces

Fault RS485
Rs=011k

W . H

7.4 BMS protocol (IRDH275B)

This protocol is an essential part of the Bender Measuring Device Interface.
Data transmission generally makes use of ASCII characters.
Interface data are:

• Baud rate: 9600 baud

• transmission: 1 start bit, 7 data bits, 1 parity bit, 1 stop bit (1, 7, E, 1)

• Parity: even

• Checksum: sum of all transmitted bytes = 0 (without CR and LF)

The BMS bus protocol works according to the MASTER-SLAVE principle. That
means that one device represents the MASTER while all other bus nodes are
SLAVES. It is important that only one MASTER is present in each network. All
bus nodes are identified by a unique address. The MASTER scans all other de­vices on the bus cyclically, listens to their signals and then carries out specific
commands. Bus address 1 must be assigned to the Master, thus to one of the
IRDH275B devices.

7.4.1 BMS Master

A Master can query all warning and operating messages from a slave.
If the bus address 1 has been selected for one IRDH275B, this device automat­ically represents the Master, that means that all addresses between 1 and 150
are cyclically scanned via the BMS bus for alarm and operating messages. If
the Master receives no answer from five subsequent addresses, the scanning
cycle is started again. If the Master recognizes incorrect answers from a slave,
the fault message "Fault RS485" is issued by the Master.

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69

Serial interfaces

***IT-SYSTEM***
R+=500K

Faults may be caused when:

• addresses are assigned twice

• a second master exists on the BMS bus

• interference signals occur on the bus lines

• a defective device is connected to the bus

• terminating resistors are not activated

7.4.2 BMS Slave

All IRDH275B are factory set to slave mode (address 3). In a BMS network, one
address must be selected from the address range 2…30 for each slave. There
may be no gaps of more than five subsequent addresses, so that all slaves can
be scanned by the Master. For IRDH275B a BMS address can be selected from
the address range 1…30. When assigning the addresses, also other devices
such as the EDS47x-12 must be considered.
The correct reception of BMS data is indicated by a flashing point on the dis­play on the right of the measuring pulse indication.

Flashing point:
BMS data re­ceived

If no flashing point appears, it may be attributed to the following:

• no Master available in the network

• more than one Master available in the network

• RS485 interface (terminal A/B) not connected or reversed

70

IRDH275_D00122_02_M_XXEN/10.2016

Serial interfaces

The following table gives an overview about essential alarm messages and
the assignment of the messages indicated on the display or operator panels,
e.g. PRC1470.

Message

Channel

Meaning

Insulation Fault 1 Insulation resistance < setting Alarm 1

Insulation Fault 2 Insulation resistance < setting Alarm 2

Connection system 3 Connection error L1/L2 against system

Connection PE

Connection error /KE against PE

4

conductor

Device error 5 Internal device error

The BMS function is completely available in the standby mode
(Stand-by: F1/F2).

7.4.3 Commissioning of an RS485 network with BMS protocol

• Connect the terminals A and B of all bus nodes in one line

• Switch the terminating resistors on at the beginning and end of the

RS485 network or in case of devices without a terminating switch, at
the end of the bus, connect a 120 Ω resistor to the terminals A and B.

• Switch the supply voltage U

• Determine one IRDH275 as the Master and assign address 1.

• Assign the addresses (2…30) subsequently to all other IRDH275B

devices and other bus nodes (see table below).

• Check whether a flashing point appears on all devices
(BMS commands are being received).

• The sub menu "ISO-Monitor" in the COM SETUP menu allows insulation
values of the ISOMETER
address of the ISOMETER

on.

S

®

s to be queried. Before starting the query, the

®

has to be entered.

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71

BMS-bus address ranges

Addresses* Device Meaning

0 There is no device with address 0 !

Information sent to address 0 applies to all
devices connected to the interface (broadcast)

1 PRC1470 Control and indicating device

1…30 IRDH275B/

375B/575
1…30 COM460 Protocol converter
2…30 EDS47x-12 Insulation fault evaluators (localisation)

31…60 SMO480-12 Signal converter relay

61…90 EDS47xE-12 Insulation fault evaluators (localisation)
111…119 PGH47x Test device for insulation fault location
121…150 PGH47xE Test device for insulation fault location

Malfunctions due to wrong address assignment!

Assigning wrong addresses to external devices may cause
malfunctions. Assign the addresses in a way that there are
no gaps of more than five subsequent addresses (1…30,
31…60, 61…90, 111…119 and 121…151).

Insulation monitoring device

Serial interfaces

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IRDH275_D00122_02_M_XXEN/10.2016

8. Technical data IRDH275(B)

8.1 Data in tabular form

The values marked with * are absolute values

Insulation coordination acc. to IEC 60664-1

Rated voltage.....................................................................................................................................................AC 800 V

Rated impulse voltage/pollution degree............................................................................................................8 kV / 3

Voltage ranges

IRDH275....:

Nominal voltage range U
Nominal frequency f
Nominal voltage range U
IRDH275….-435:
Supply voltage U
Frequency range U
Supply voltage U
IRDH….-427:
Supply voltage U
IRDH275….:

Power consumption .......................................................................................................................................... ≤ 14 VA

Response values

Response value R
Response value R

Relative uncertainty (20 kΩ…1 MΩ) (acc. to IEC 61557-8:2007-01) ............................................................. ±15 %

Relative uncertainty (1 kΩ…20 kΩ).................................................................................................... +2 kΩ / +20 %

Relative uncertainty (1 MΩ…10 MΩ).............................................................................................. 0,2 MΩ / +20 %

Response time t

Measuring time.......................................................................................................................... see characteristic curve

Hysteresis (1 kΩ…10 kΩ) ................................................................................................................................... +2 kΩ

Hysteresis (10 kΩ…10 MΩ)................................................................................................................................. 25 %

..................................................................................................1AC / 3 (N) AC 0…793 V*

n

(for f < 50 Hz see characteristic curve on page 79) ............................................0,1…460 Hz

n

...................................................................................................................... DC 0…650 V*

n

(see nameplate).......................................................................................................AC 88…264 V*

s

................................................................................................................................... 42…460 Hz

s

(see nameplate)...................................................................................................... DC 77…286 V*

s

(see nameplate)..................................................................................................... DC 19.2…72 V*

s

(Alarm 1) ................................................................................................................1 kΩ…10 MΩ

an1

(Alarm 2) ................................................................................................................1 kΩ…10 MΩ

an2

at RF = 0.5 x Ran and Ce = 1 μF.............................................................................................. ≤ 5 s

an

IRDH275_D00122_02_M_XXEN/10.2016

73

Technical data IRDH275(B)

Measuring circuit

Measuring voltage U
Measuring current I
Internal DC resistance R
Internal impedance Z
Permissible extraneous DC voltage U
Permissible system leakage capacitance C

........................................................................................................................................ ≤ 50 V

m

max. (at RF = 0 Ω)...................................................................................................... ≤ 280 μA

m

.................................................................................................................................. ≥ 180 kΩ

i

at50 Hz......................................................................................................................... ≥ 180 kΩ

i

.................................................................................................... ≤ DC 1200 V

fg

................................................................................................... ≤500 μF

e

Factory setting....................................................................................................................................................... 150 μF

Displays

Display, illuminated.............................................................................................................................. two-line display

Characters (number of characters)........................................................................................................................2 x 16

Display range, measuring value ............................................................................................................. 1 kΩ…10 MΩ

Operating uncertainty (20 kΩ…1 MΩ) (acc. to IEC 61557-8:2007-01) .................................................... ±15 % **

Operating uncertainty (1 kΩ…20 kΩ).......................................................................................... ±1 kΩ

/

±15 % **

Operating uncertainty (1 MΩ…10 MΩ).................................................................................. ±0,1 MΩ / ±15 % **

** = under test conditions according to IEC 61326-2-4, the tolerances may double

Outputs/inputs

TEST/ RESET button..............................................................................................................................internal /external

Cable length TEST/RESET button external ......................................................................................................... ≤ 10 m

Current output for measuring instrument SKMP (scale centre point = 120 kΩ):..........................................................

Current output IRDH275 (load) ...................................................................................................... 400 μA (≤ 12.5 kΩ)

Current output IRDH275B (load) .........................................................................................................20 mA (≤ 500 Ω)

Accuracy current output (1 kΩ…1 MΩ)

in relation to the displayed measured value........................................................................................ ±10 %, ±1 kΩ

Serial interface

Interface / Protocol IRDH275.......................................................................................................RS485 / ASCII-IsoData

Interface / Protocol IRDH275B....................................................................................................................RS485 / BMS

Connection ................................................................................................................................................ terminals A/B

Cable length ................................................................................................................................................... ≤ 1200 m

Shielded cable (shield on one site to PE)................................................. two-core, ≥ 0.6 mm

2

, e.g. J-Y(St)Y 2 x 0.6

Terminating resistor..................................................................................................................................120 Ω (0.5 W)

Device address, BMS bus .................................................................................................. 1…30 (factory setting = 3)

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IRDH275_D00122_02_M_XXEN/10.2016

Technical data IRDH275(B)

Switching components

Switching components.............................................2 changeover contacts: K1 (Alarm 1), K2 (Alarm 2, device fault)

Operating principle K1, K2 (Alarm 1, Alarm 2).............................................................................N/O or N/C operation

Factory setting (Alarm 1/Alarm 2)........................................................................................................... N/O operation

Electrical endurance...........................................................................................................12 000 switching operations

Contact class ...................................................................................................................................... IIB (IEC 60255-23)

Rated contact voltage.....................................................................................................................AC 250 V / DC 300 V

Making capacity...............................................................................................................................................AC/DC 5 A

Breaking capacity............................................................................................................... 2 A, AC 230 V, cos phi = 0.4

.......................................................................................................................................... 0,2 A, DC 220 V, L/R = 0.04 s

Minimum contact current at DC 24 V .....................................................................................................2 mA (50 mW)

General data

EMC ................................................................................................................. acc. to IEC 61326-2-4:2006-06 Ed. 1.0

Shock resistance IEC 60068-2-27 (device in operation)...........................................................................15 g / 11 ms

Bumping IEC 60068-2-29 (during transport) .............................................................................................40 g / 6 ms

Vibration resistance IEC 60068-2-6 (device in operation)................................................................1 g / 10…150 Hz

Vibration resistance IEC 60068-2-6 (during transport) ....................................................................2 g / 10…150 Hz

Ambient temperature (during operation) ..........................................................................................- 10 °C…+55 °C

Storage temperature range.................................................................................................................-40 °C…+70 °C

Climatic class acc. to IEC 60721-3-3......................................................................................................................... 3K5

Operating mode............................................................................................................................ continuous operation

Mounting ............................................................................................................................. as indicated on the display

Distance to adjacent devices ............................................................................................................................≥ 30 mm

Connection............................................................................................................................................. screw terminals

Connection, rigid, flexible........................................................................................... 0.2…4 mm

2

/ 0.2…2.5 mm

Connection, flexible with connector sleeve, without/with plastic sleeve ........................................ 0.25…2.5 mm

Conductor sizes (AWG).......................................................................................................................................... 24-12

Tightening torque ............................................................................................................................................... 0.5 Nm

Protection class, internal components (DIN EN 60529) .......................................................................................... IP30

Protection class, terminals (DIN EN 60529)............................................................................................................. IP20

Type of enclosure..................................................................................................................... X112, free from halogen

DIN rail mounting ............................................................................................................................................ IEC 60715

Flammability class ........................................................................................................................................... UL94 V-0

Software version IRDH275 ............................................................................................................................. D160 V1.8

2

2

IRDH275_D00122_02_M_XXEN/10.2016

75

Technical data IRDH275(B)

Software version IRDH275B .......................................................................................................................... D159 V1.8

Weight approx. ...................................................................................................................................................... 510 g

Option „W“

Shock resistance IEC 60068-2-27 (Device in operation) ........................................................................... 30 g / 11 ms

Bumping IEC 60068-2-29 (during transport).............................................................................................. 40 g / 6 ms

Vibration resistance IEC 60068-2-6 .............................................................................................1.6 mm / 10…25 Hz

............................................................................................................................................................ 4 g / 25…150 Hz

Ambient temperature (during operation) ..........................................................................................-40 °C…+70 °C

Storage temperature range .................................................................................................................-40 °C…+85 °C

Screw mounting.................................................................................................................................................... 2 x M4

The values marked with * are absolute values

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IRDH275_D00122_02_M_XXEN/10.2016

Technical data IRDH275(B)

8.2 Standards, approvals and certifications

The ISOMETER® was designed under consideration of the following standards:

- DIN EN 61557-8 (VDE 0413-8)

- IEC 61557-8:2007 + Corrigendum

- IEC 61326-2-4

- DIN EN 60664-1 (VDE 0110-1)

- DIN EN 60664-3 (VDE 0110-3)

- ASTM F1669M-96(2007)

- ASTM F1207M-96(2007)

IRDH275_D00122_02_M_XXEN/10.2016

77

Technical data IRDH275(B)

1

10

100

1000

1 10 100 1000

C

e

[μF]

≤ 10 MΩ

≥

0 kΩ

R

F

t

an

[s]

8.3 Characteristic curves

ISOMETER® response times in relation to system leakage
capacitances of:

Ce = 1…500 μF, Un = 0…793 V / 50 Hz

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IRDH275_D00122_02_M_XXEN/10.2016

Technical data IRDH275(B)

100

1000

10000

0,1 1 10 100

f

n

[Hz]

U

n

[V]

AGH520S

AGH204S-4

IRDH275

0,3

Max. AC voltage between the IT system and earth in the
frequency range <50 Hz

IRDH275_D00122_02_M_XXEN/10.2016

79

Current output 0…400 μA (only IRDH275)

R

F

[ kW]

I

[ mA]

RF =

400 mA x 120 kW

I

- 120 kW

Technical data IRDH275(B)

RF =Insulation fault in kΩ
I =Current output in mA

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IRDH275_D00122_02_M_XXEN/10.2016

Technical data IRDH275(B)

1

10

100

1000

10 000

0 5 10 15 20 25

I [mA]

R

F

[kW]

RF =

20 mA x 120 kW

I

- 120 kW

Current output 0…20 mA (IRDH275B)

RF =Insulation fault in kΩ
I =Current output in mA

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81

Current output 4…20 mA (IRDH275B)

1

10

100

1000

10 000

0 5 10 15 20 25

I [mA]

R

F

[kW]

RF =

16 mA x 120 kW

I - 4 mA

- 120 kW

Technical data IRDH275(B)

RF =Insulation fault in kΩ
I =Current output in mA

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Technical data IRDH275(B)

Value of the respective number

os

iti

on

of

numbers

from the

left

0 = 1 = 2 = 3 = 4 =

1

K1: N/O operation Test K1: N/C operation Test K1: flashing function K1: N/O operation K1: N/C operation

2

K2: N/O operation Test K2: N/C operation Test K2: flashing function K2: N/O operation K2: N/C operation

3

no external coupling AK AGH204S 80K AK AGH520S AK AGH204S 160K AK AGH150W 160K

4

Cemax 1 μF ** Cemax 10 μF ** Cemax 150 μF Cemax 500 μF

5

6

Self test every 24 hours Self test every hour no periodic self test

7

Language German Language English

8

Password protection not

activated

Password protection

activated

9

AMP measuring

principle

DC measuring principle

10

max. filter frequency

0.1Hz **

max. filter frequency 1Hz

**

max. filter frequency

10Hz **

max. filter frequency

50Hz **

11

min. filter frequency

0,1Hz **

min. filter frequency 1Hz

**

min. filter frequency

10Hz **

min. filter frequency

50Hz **

12

BMS mode ** Isodata ** test data **

13

Bus address in the tens

place IRDH275

Value: 5 ... 9

14

Bus address in the units

place IRDH275

Value: 5 ... 9

15

Number of pulses 2-9 **

Value: 5 ... 9

** The parameters marked with two asterisks are settable via the Service menu item! A password is required for that

purpose !

Status number

IRDH275_D00122_02_M_XXEN/10.2016

83

Dimension diagram enclosure IRDH275(B)

• DIN rail mounting according to IEC 60715
or

• Screw mounting
by means of a plug-in trapezoidal support
Order No.: 990056 (Option W)

Technical data IRDH275(B)

84

IRDH275_D00122_02_M_XXEN/10.2016

Technical data IRDH275(B)

8.4 Ordering details

8.4.1 ISOMETER®

Typ e

IRDH275-435 3(N)AC 0…793 V

IRDH275W-435 „ „ B91065100W

IRDH275B-435 „ „ B91065101

IRDH275BW-435 „ „ B91065101W

IRDH275-427 AC 19,2…55 V

IRDH275W-427 „ „ B91065104W

IRDH275B-427 „ „ B91065105

IRDH275BW-427 „ „ B91065105W

IRDH275-425 „ 10,2…36 V B91065108

IRDH275B-425 „ „ B91065109

Nominal

voltage U

DC 0…650 V

42…460 HZ

n

Supply

voltage U

AC 88…264 V
DC 77…286 V

DC 19.2…72 V

s

Art.-No.

B91065100

B91065104

Series …B…

The 275B series provides a BMS interface, a memory with real-time clock and
other features. An overview about these features is shown in the menu struc­ture on page 45 and in the product and function description on page 20.

IRDH275_D00122_02_M_XXEN/10.2016

85

Technical data IRDH275(B)

Option "W"

Devices with ending "W" provide improved shock and vibration resistance. A
special varnish of the electronics provides higher resistance against mechan­ical stress and moisture. This makes the devices suitable for use in ships, on
rolling stock and in seismic environment.

8.4.2 Coupling devices

Type Nominal voltage Art. No.

AGH204S-4 AC 0…1650 V B914013
AGH520S AC 0…7200 V B913033
AGH150W-4 DC 0…1760 V B98018006

range U

n

8.4.3 Measuring instruments

Type Measuring range Dimensions Art. No.

7204-1421 0…400 μA 72 x 72 mm B986763
9604-1421 0…400 μA 96 x 96 mm B986764
7204S-1421 0…400 μA 72 x 72 mm B986804
9604S-1421 0…400 μA 96 x 96 mm B986784

9620-1421 0…20 mA 96 x 96 mm B986841
9620S-1421 0…20 mA 96 x 96 mm B986842

86

IRDH275_D00122_02_M_XXEN/10.2016

INDEX

A

Additional characteristics IRDH275B 19
AGH...

32

Alarm LED 1
Alarm LED 2
Alarm messages
Approvals
Automatic self test

B

Bender Measuring Device Interface 69
BMS bus

BMS-bus

BMS-bus address ranges
BMS-Master
BMS-Slave

C

Changing the measuring principle 55
Characteristic curves
Commissioning flow chart
Commissioning of a BMS network
Common characteristics
Coupling devices

41
41

71

77

55

- correct arrangement

- wrong arrangement

- address ranges

72

72

69

70

78

19

- ordering details

- wiring diagram

86

32

68

68

29

71

Current output 0...400 mA
Current output 4...20 mA

D

Device fault LED 22
Dimension diagram enclosure IRDH275
Directions for installation
Display in the menu mode
Display in the standard mode

E

Explanations of symbols and warnings 19
External coupling devices
External RESET button
External TEST button

F

Factory setting 18
Fault memory ON/OFF
Flashing point
Function
Function input F1/F2

H

Historical memory 48
How to use this manual

I

INFO key 41

70

20

80

82

19

43

42

54

31

31

53

25

7

84

IRDH275_D00122_02_M_XXEN/10.2016

87

Intended use 16
Interconnected systems
ISO monitor (IRDH275B)
IsoData protocol

M

Measuring instruments 86
Memory database
Menu

- COM SETUP

- HISTORY INFO

- ISO ADVANCED

- ISO SETUP

- LANGUAGE

- PASSWORD

- SERVICE

Menu structure

24

59

65

48

58

49

54

50

63

61

64

47

S

Self test, ISOMETER 41
Service

8

Setting the bus address for IRDH275B
Setting the date (IRDH275B)
Setting the language of the fault message

63

Setting the operating principle of the alarm

relays

50

Setting the password
Setting the real-time clock
Setting the response values Alarm 1 and

Alarm 2
Setting the system leakage capacitance
Standards
Status number
Support

8

61

50

77

83

58

55

55

55

O

Operating features and displays 41
Option „W“

19

Ordering details

P

Parameterization via Internet 64
Product description

R

Real-time clock 24
RESET button
RS485 interface

85

20

21, 41

67

88

T

Technical data IRDH275 73
Terminating resistor
TEST button
Topology (IRDH275B)
Training courses

W

Wiring diagram ISOMETER 31
Wiring of the RS485 network
Work activities on electrical installations
workshops
Wrong arrangement

IRDH275_D00122_02_M_XXEN/10.2016

67

41

68

10

68

13

10

68

IRDH275_D00122_02_M_XXEN/10.2016

89

Bender GmbH & Co. KG

Londorfer Str. 65 • 35305 Gruenberg • Germany
Postfach 1161 • 35301 Gruenberg • Germany

Tel.: [phone]
Fax: [phone]

Email: [e-mail]
Web: http://www.bender.de

Photos: Bender archives and bendersystembau archives.

BENDER Group