Bender AGH675S-7 User manual

Manual
EN
Insulation monitoring device for medium voltage IT systems
with galvanically connected rectifiers and converters
up to AC/DC 15.5 kV
in combination with the coupling devices AGH675S-7
and AGH675S-7MV15
IRDH275BM-7_D00123_04_M_XXEN/03.2015
ISOMETER® IRDH275BM-7
Coupling device AGH675S-7
and AGH675S-7MV15
Insulation monitoring device for medium voltage
IT systems with galvanically connected rectifiers
and converters up to AC/DC 15.5 kV in combination with
the coupling devices AGH675S-7 and AGH675S-7MV15
IRDH275BM-7_D00123_06_M_XXEN/07.2018

Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Grünberg • Germany
P.O. Box 1161 • 35301 Grünberg • Germany
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
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
3
IRDH275BM-7_D00123_06_M_XXEN/07.2018
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 ................................................................................................ 9
1.4 Delivery conditions .......................................................................................... 9
1.5 Inspection, transport and storage ........................................................... 10
1.6 Warranty and liability ................................................................................... 10
1.7 Disposal ............................................................................................................ 11
2. Safety instructions ......................................................................................... 12
2.1 General safety instructions ........................................................................ 12
2.2 Work activities on electrical installations ............................................. 12
2.3 Device-specific safety information ......................................................... 13
2.4 Intended use ................................................................................................... 15
2.5 Directions for installation ........................................................................... 16
3. Function ........................................................................................................... 18
3.1 Characteristics IRDH275BM-7 incl. AGH675S-7… ............................. 18
3.2 Product description ...................................................................................... 19
3.3 Function ............................................................................................................ 19
4. Installation and connection ......................................................................... 24
4.1 Installation of the coupling device AGH675S-7… ............................ 24
4.2 Wiring diagram .............................................................................................. 25

Table of Contents
4IRDH275BM-7_D00123_06_M_XXEN/07.2018
5. Operation and setting .................................................................................. 30
5.1 Operating features and displays IRDH275BM-7 ................................. 30
5.1.1 Display in the standard mode ................................................................... 31
5.1.2 Display in the menu mode ......................................................................... 31
5.1.3 Function keys .................................................................................................. 32
5.2 Menu structure and menu mode ............................................................ 34
5.2.1 Diagram menu structure ............................................................................ 35
5.3 Menu HISTORY INFO .................................................................................... 36
5.3.1 Diagram HISTORY INFO ............................................................................... 37
5.4 Menu ISO SETUP: Setting of the basic ISOMETER® functions ........ 38
5.4.1 Response values Alarm 1 and Alarm 2 ................................................... 38
5.4.2 Operating principle of the alarm relays ................................................ 39
5.4.3 Memory setting (on/off) .............................................................................. 41
5.4.4 Current output for external measuring instruments ........................ 41
5.5 Menu ISO ADVANCED: Setting of the extended functions ........... 42
5.5.1 Coupling devices AGH: 675S-7… ............................................................ 42
5.5.2 Adaptation to the system leakage capacitance Cemax .................. 42
5.5.3 Measuring principle (Measure: AMP) ..................................................... 42
5.5.4 Setting the repetition time for automatic self tests
(Autotest: 24h) ................................................................................................ 42
5.5.5 Setting the real-time clock (Clock) .......................................................... 42
5.5.6 Setting the date (Date) ................................................................................ 43
5.5.7 Specifying the starting time of the automatic self test (Test)
(IRDH275B) ....................................................................................................... 43
5.5.8 Diagram ISO ADVANCED ............................................................................ 44
5.6 Menu COM SETUP: Setting the BMS interface .................................... 45
5.6.1 Bus address „Addr:“ ...................................................................................... 45
5.6.2 Diagram COM SETUP ................................................................................... 46
5.7 Menu PASSWORD ......................................................................................... 47
5.7.1 Activating and setting the password ..................................................... 47
5.7.2 Diagram PASSWORD .................................................................................... 48
5.8 Menu LANGUAGE .......................................................................................... 49

Table of Contents
5
IRDH275BM-7_D00123_06_M_XXEN/07.2018
5.8.1 Setting the national language .................................................................. 49
5.8.2 Diagram Language ....................................................................................... 49
5.9 Menu SERVICE ................................................................................................ 50
5.10 Parameterization via Internet ................................................................... 50
6. Serial interfaces .............................................................................................. 51
6.1 RS-485 interface with BMS protocol ....................................................... 51
6.2 Topology RS-485 network .......................................................................... 52
6.2.1 Correct arrangement ................................................................................... 52
6.2.2 Wrong arrangement .................................................................................... 52
6.2.3 Wiring ................................................................................................................ 52
6.3 BMS protocol .................................................................................................. 53
6.3.1 BMS Master ...................................................................................................... 53
6.3.2 BMS Slave ......................................................................................................... 54
6.3.3 Commissioning of an RS-485 network with BMS protocol ............ 55
7. Technical data IRDH275BM-7 with AGH675S-7… ................................... 57
7.1 Data in tabular IRDH275BM-7 ................................................................... 57
7.2 Standards and approvals ............................................................................ 60
7.3 Data in tabular AGH675S-7 ........................................................................ 61
7.4 Data in tabular AGH675S-7MV15 ............................................................ 63
7.5 Characteristic curves .................................................................................... 65
7.6 Ordering details ............................................................................................. 70
7.6.1 ISOMETER® and coupling devices ........................................................... 70

Table of Contents
6IRDH275BM-7_D00123_06_M_XXEN/07.2018

7
IRDH275BM-7_D00123_06_M_XXEN/07.2018
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
To make it easier for you to understand and revisit certain sections in this man-
ual, we have used symbols to identify important instructions and information.
The meaning of these symbols is explained below:
This manual is intended for qualified personnel working in
electrical engineering and electronics!
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 medium risk of danger that
can lead to death or serious injury if not avoided.
This symbol denotes information intended to assist the user
in making optimum use of the product.
DANGER
WARNING
CAUTION

Important information
8IRDH275BM-7_D00123_06_M_XXEN/07.2018
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: [email protected]
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)
[phone]**, -785** (sales)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:
Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Grünberg

Important information
9
IRDH275BM-7_D00123_06_M_XXEN/07.2018
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
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 Standard-
Software 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 de-
liveries, modifications and changes to general delivery conditions for prod-
ucts and services in the electrical industry) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and Electron-
ic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed or elec-
tronic format.

Important information
10 IRDH275BM-7_D00123_06_M_XXEN/07.2018
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 tem-
peratures can be ensured.
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 follow-
ing 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.

Important information
11
IRDH275BM-7_D00123_06_M_XXEN/07.2018
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this de-
vice. Ask your supplier if you are not sure how to dispose of the old equip-
ment.
The directive on waste electrical and electronic equipment (WEEE directive)
and the directive on the restriction of certain hazardous substances in electri-
cal and electronic equipment (RoHS directive) apply in the European Commu-
nity. 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 IRDH275BM-7_D00123_06_M_XXEN/07.2018
2. Safety instructions
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
If the device is used outside the Federal Republic of Germany, the applicable
local standards and regulations must be complied with. The European stand-
ard EN 50110 can be used as a guide.
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.
DANGER

Safety instructions
13
IRDH275BM-7_D00123_06_M_XXEN/07.2018
2.3 Device-specific safety information
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.
WARNING
CAUTION
CAUTION

Safety instructions
14 IRDH275BM-7_D00123_06_M_XXEN/07.2018
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).

Safety instructions
15
IRDH275BM-7_D00123_06_M_XXEN/07.2018
2.4 Intended use
The ISOMETER® with additional coupling devices is intended for:
 monitoring the insulation resistance of IT systems.
In order to meet the requirements of the applicable standards, customised pa-
rameter 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.

Safety instructions
16 IRDH275BM-7_D00123_06_M_XXEN/07.2018
2.5 Directions for installation
The terminals and KE shall be connected by a separate wire to the pro-
tective conductor (PE). If the device is connected by means of terminal AK via
the coupling device to a system under operation, the terminals and KE
must not be disconnected from the protective conductor (PE).
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.
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.
CAUTION
CAUTION

Safety instructions
17
IRDH275BM-7_D00123_06_M_XXEN/07.2018
IThe devices, variant -7.. are delivered with the following factory setting:
Please check if the basic setting of the ISOMETER® complies with the require-
ments of the system to be monitored.
ISO SETUP Alarm 1 / Alarm 2
(response values)
= 2 MΩ / 100 kΩ
ISO SETUP Operating principle K1/K2 = N/O operation
ISO SETUP Memory = off
ISO
ADVAN-
CED
System leakage capacitance = 2 µF
ISO
ADVAN-
CED
Coupling device = AGH: 675S-7
COM
SETUP
Bus address = 3 (slave)
When an AC system includes galvanically connected DC
circuits, the following shall be considered:
Insulation faults in DC circuits can only be monitored
correctly when the rectifiers carry a continuous load of
5…10 mA.

18 IRDH275BM-7_D00123_06_M_XXEN/07.2018
3. Function
3.1 Characteristics IRDH275BM-7 incl. AGH675S-7…
 Device combination for use in medium voltage systems with conver-
ters up to AC/DC 15.5 kV (IT = unearthed systems))
 Automatic adaptation to the existing system leakage capacitance
 measuring principle (European Patent: EP 0 654 673 B1)
 Two separately adjustable ranges of the response value100 k…
10 M (Alarm 1, Alarm 2)
 Two-line LC display
 Automatic device self test
 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 (RS-485 electrically isolated).
 Current output 0 (4)…20mA (galvanically separated) in relation to the
measured insulation value.
 Remote setting of certain parameters via the Internet (option; protocol
converter FTC470XET additionally required)
AMP
Plus

Function
19
IRDH275BM-7_D00123_06_M_XXEN/07.2018
3.2 Product description
 The ISOMETER® IRDH275BM-7 and coupling device AGH675S-7 moni-
tor the insulation resistance of IT medium voltage systems up to 7.2 kV.
 The ISOMETER® IRDH275BM-7 and two coupling devices AGH675S-
7MV15 monitor the insulation resistance of IT medium voltage systems
up to 15.5 kV.
Both combinations are suitable for universal use in 3/(N) AC, AC/DC and DC
systems. AC systems may include extensive DC supplied loads, such as con-
verters or thyristor-controlled DC drives. Drive systems including a converter
and a motor in medium voltage systems can be monitored.
 When the AGH675S-7 is connected in the mid-point of the converter
DC intermediate circuit, a maximum of ±7.2 kV against PE may occur.
 When the two coupling devices AGH675S-7MV15 are connected in the
mid-point of the converter DC intermediate circuit, a maximum of
±15.5 kV against PE may occur.
The device automatically adapts itself to the existing system leakage capaci-
tance. The IRDH275BM-7 can be used in combination with a control and indi-
cation panel, e.g. PRC1470 version 2 or higher, on the BMS (BMS = Bender
Measuring Device Interface) bus.
3.3 Function
The combination ISOMETER® IRDH275BM-7 and coupling device AGH675S-7
or two coupling devices AGH675S-7MV15 is operated 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 non-
volatile memory (EEPROM) after the setting is completed.
A microprocessor-controlled pulsating AC measuring voltage is superim-
posed on the IT system to be monitored ( measuring principle*).
The measuring cycle consists of positive and negative pulses of the same am-
plitude. The period of these pulses depends on the respective system leakage
capacitances and the insulation resistances of the IT system to be monitored.
AMP
Plus

Function
20 IRDH275BM-7_D00123_06_M_XXEN/07.2018
An insulation fault between the IT system and earth closes the measuring cir-
cuit. From the measured current value, the microprocessor calculates the in-
sulation resistance which is indicated on the LC display or the external kΩ
measuring instrument.
The measuring time tan is determined by the system leakage capacitances, the
insulation resistance, and the system-related interference disturbances. Sys-
tem leakage capacitances do not influence the measuring accuracy. When vir-
tually no disturbances are caused by the operation of converters, the
measuring process takes about five minutes.
If the reading is below the selected response values Alarm 1/Alarm 2, the as-
sociated 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, provid-
ed that the currently displayed insulation resistance is at least 25 % above the
actual response value when the reset is carried out. The fault memory behav-
iour can also be set in the "ISO SETUP" menu, by selecting the sub menu Mem-
ory: on/off.
The connections for an external kΩ display supplied by the current output
0(4)…20 mA at M+/M- are galvanically isolated.
*) measuring principle "adaptive measuring pulse", a measuring
principle developed by Bender (European Patent: EP 0 654 673 B1).
AMP
Plus