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Operating Manual
A-ISOMETER® IRDH275
Power in electrical safety
IRDH275B
Insulation monitoring device for
IT AC systems with galvanically connected
rectifiers and converters
and for IT DC systems
Software version IRDH275: D160 V1.4
Software version IRDH275B: D159 V1.4
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Dipl.-Ing. W. Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Grünberg • Germany
Postfach 1161 • 35301 Grünberg • Germany
Tel.: +49 6401-807-0
Fax: +49 6401-807-259
E-mail: info@bender-de.com
Web: http://www.bender-de.com
© Dipl.-Ing. W. Ben der GmbH & Co . KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
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Table of Contents
1. Safety information .................................................................................. 7
1.1 Use for the intended purpose ............................................................................. 7
1.2 Warranty and liability ............................................................................................. 7
1.2.1 Personnel .................................................................................................................... 8
1.2.2 About the operating manual .............................................................................. 8
1.2.3 Hazards when handling the A-ISOMETER® IRDH275 .................................. 8
1.2.4 Inspection, transport and storage ..................................................................... 9
1.2.5 Note .............................................................................................................................. 9
1.3 Explanations of symbols and warnings ........................................................... 9
1.4 Directions for installation ................................................................................... 10
2. Function ................................................................................................. 11
2.1 Common characteristics (IRDH275 and IRDH275B) .................................. 11
2.2 Additional characteristics IRDH275B .............................................................. 11
2.3 Product description .............................................................................................. 12
2.4 Function .................................................................................................................... 12
2.5 Additional functions IRDH275B ........................................................................ 15
3. Commissioning flow chart (threepart) ............................................. 19
4. Connection ............................................................................................ 23
4.1 Wiring ......................................................................................................................... 23
4.2 Wiring diagrams with coupling devices ........................................................ 26
4.2.1 Connection with AGH150W-4 ........................................................................... 26
4.2.2 Connection with AGH520S ................................................................................ 27
4.2.3 Connection with AGH204S-4 ............................................................................ 28
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Table of Contents
5. Operation and setting .......................................................................... 31
5.1 Operating features and displays IRDH275(B) .............................................. 31
5.1.1 Display in the standard mode ........................................................................... 32
5.1.2 Display in the menu mode ................................................................................. 32
5.1.3 Function keys .......................................................................................................... 33
5.2 Menu structure and menu mode ................................................... 36
5.2.1 Diagram menu structure ..................................................................................... 37
5.3 Menu HISTORY INFO (IRDH275B) .................................................. 38
5.3.1 Diagram HISTORY INFO (IRDH275B) ............................................................... 39
5.4 Menu ISO SETUP:
Setting of the basic A-ISOMETER® functions ................................ 40
5.4.1 Response values Alarm 1 and Alarm 2 ........................................................... 40
5.4.2 Operating principle of the alarm relays ......................................................... 40
5.4.3 Memory setting (on/off) ...................................................................................... 42
5.4.4 Current output for external measuring instruments (IRDH275B) ........ 42
5.5 Menu ISO ADVANCED:
Setting of the extended functions ................................................ 43
5.5.1 External coupling devices (AGH: no) .............................................................. 43
5.5.2 Adaptation to the system leakage capacitance (Cemax : 150 μF) ....... 44
5.5.3 Changing the measuring principle from AMP to DC (Measure: AMP) 44
5.5.4 Setting the repetition time for automatic self tests (Autotest: 24h) ... 44
5.5.5 Setting the real-time clock (Clock) (IRDH275B) .......................................... 44
5.5.6 Setting the date (Date) (IRDH275B) ................................................................ 44
5.5.7 Specifying the starting time of the automatic self test (Test)
(IRDH275B) ............................................................................................................... 44
5.5.8 Diagram ISO ADVANCED .................................................................................... 45
5.6 Menu COM SETUP:
Setting the BMS interface .............................................................. 46
5.6.1 Bus address „Addr:“ (IRDH275B) ...................................................................... 46
5.6.2 ISOnet function (IRDH275B) .............................................................................. 46
5.6.3 ISO monitor (IRDH275B) ...................................................................................... 46
5.6.4 Diagram COM SETUP (IRDH275B) .................................................................... 47
5.7 Menu PASSWORD ........................................................................... 48
5.7.1 Activating and setting the password ............................................................. 48
5.7.2 Diagram PASSWORD ............................................................................................ 48
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Table of Contents
5.8 Menu LANGUAGE ........................................................................... 49
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 RS485 interface with IsoData protocol (IRDH275) ..................................... 51
6.2 RS485 interface with BMS protocol (IRDH275B) ......................................... 53
6.3 Topology RS485 network (IRDH275B) ............................................................ 54
6.3.1 Correct arrangement ............................................................................................ 54
6.3.2 Wrong arrangement ............................................................................................. 54
6.3.3 Wiring ......................................................................................................................... 54
6.4 BMS protocol (IRDH275B) ................................................................................... 55
6.4.1 BMS Master .............................................................................................................. 55
6.4.2 BMS Slave ................................................................................................................. 56
6.4.3 Commissioning of an RS485 network with BMS protocol ...................... 57
7. Technical data IRDH275(B) .................................................................. 59
7.1 Data in tabular form ............................................................................................. 59
7.2 Standards and approvals .................................................................................... 62
7.3 Characteristic curves ............................................................................................ 63
7.4 Ordering details ..................................................................................................... 70
7.4.1 A-ISOMETER® ........................................................................................................... 70
7.4.2 Coupling devices ................................................................................................... 71
7.4.3 Measuring instruments ....................................................................................... 71
7.4.4 Label for modified versions ............................................................................... 71
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1. Safety information
1.1 Use for the intended purpose
The A-ISOMETER® is intended for:
z 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
z compliance with all information in the operating instructions, and
z compliance with test intervals.
As a basic principle, our "General conditions of Sale and Delivery" shall apply. At the latest, these shall be available to the operator when the contract
is concluded.
1.2 Warranty and liability
Warranty and liability claims in cases of damage to persons and property
shall be excluded if they are attributable to one or more of the following
causes:
z Use of the A-ISOMETER® other than for the intended purpose
z Incorrect assembly or installation, commissioning, operation and mainte-
nance of
the A-ISOMETER®.
z Failure to comply with the information in the operating instructions regarding
transport, commissioning, operation and maintenance of the A-ISOMETER®.
z Unauthorized structural modifications to the A-ISOMETER®.
z Failure to comply with the technical data
z Improperly executed repairs, and the use spare parts or accessories which are
not recommended by the manufacturer.
z Cases of disaster and force majeure
z Assembly and installation with device combinations not recommended.
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Safety information
This operating manual, especially the safety information, must be observed
above all by personnel who work on the A-ISOMETER®.
In addition, the rules and regulations that apply for accident prevention at
the place of use must be observed.
1.2.1 Personnel
Only appropriately qualified staff may work on the A-ISOMETER®. Qualified
means familiar with the installation, commissioning and operation of the
product and with training appropriate to the work.
Personnel must have read and understood the safety section and warning information in this operating manual.
1.2.2 About the operating manual
This operating manual has been compiled with the greatest possible care.
Nevertheless, errors and mistakes cannot be entirely ruled out. The BENDER
companies assume no liability whatsoever for any injury to persons or damage to property which may be sustained as a result of faults or errors in this
operating manual.
1.2.3 Hazards when handling the A-ISOMETER® IRDH275
The A-ISOMETER® IRDH275 is constructed according to the state-of-the-art
and recognized technical safety rules. Nevertheless, when it is being used,
hazards may occur to the life and limb of the user or third parties, or there
may be adverse effects on the A-ISOMETER® or on other valuable property.
The A-ISOMETER® must only be used:
z for the purpose for which it is intended
z when it is in perfect technical condition as far as safety is concerned
Any faults which may impair safety must be eliminated immediately. Impermissible modifications and the use of spare parts and additional devices
which are not sold or recommended by the manufacturer of the devices may
cause fires, electric shocks and injuries.
Unauthorized persons must not have access to or contact with the A-ISOMETER®. Warning signs must always be easily legible. Damaged or illegible
signs must be replaced immediately.
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Safety information
1.2.4 Inspection, transport and storage
Inspect the dispatch packaging and equipment packaging for damage, and
compare the contents of the package with the delivery documents. In the
event of damage in transit, please inform the BENDER company immediately.
The devices must only be stored in areas protected from dust, damp and
spray or dripping water, and in which the specified storage temperatures are
maintained.
1.2.5 Note
Make sure that the operating voltage is correct!
Prior to insulation and voltage tests, the A-ISOMETER® must be disconnected
from the power system for the duration of these tests.
In order to check the proper connection of the device, it is recommended to
carry out a functional test.
Make sure that the basic settings meet the requirements of the system.
Children and unauthorized persons must not have access to or contact with
the A-ISOMETER®.
1.3 Explanations of symbols and warnings
The following symbols are used in BENDER documentation to draw attention to important information and to make it easier to find certain text passages. The following examples explain the meaning of the symbols:
TGH1361en/11.2009
The "Attention" symbol is used to draw attention to information
warning employees of hazardous situations.
Information you should know for correct handling of the product is
marked with the "Info" symbol.
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Safety information
1.4 Directions for installation
Only one insulation monitoring device may be used in each interconnected IT system.
When insulation or voltage test are to be carried out, the device shall
be isolated from the system for the test period.
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).
In order to check the proper connection of the device, it is recommended to
carry out a functional test using a genuine earth fault, e.g. via a suitable resistance, before starting the A-ISOMETER®.
The devices, variant -4.. are delivered with the following factory setting:
ISO SETUP:
Alarm 1 / Alarm 2
(response values)
=40 kΩ / 10 kΩ
ISO SETUP: Operating principle K1/K2 = N/O operation
ISO SETUP: Memory = off
ISO ADVANCED: System leakage capacitance = 150 μF
COM SETUP: Bus address = 3 (slave)
Please check if the basic setting of the A-ISOMETER® complies with the requirements of the system to be monitored.
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.
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2. Function
2.1 Common characteristics (IRDH275 and IRDH275B)
z A-ISOMETER® for IT AC systems with galvanically connected rectifiers
and for IT DC systems (IT = unearthed systems)
z The operating range of the nominal voltage U
devices.
z Automatic adaptation to the existing system leakage capacitance
z measuring principle (European Patent: EP 0 654 673 B1)
z Two separately adjustable ranges of the response value1 kΩ...10 MΩ
(Alarm 1, Alarm 2)
z Two-line LC display
z Connection monitoring (monitoring of the measuring leads)
z Automatic device self test
z Option "W":
This option provides: improved shock and vibration resistance for use in ships,
on rolling stock and in seismic environment.
2.2 Additional characteristics IRDH275B
z Memory with real-time clock to store all alarm messages with date and time
stamp.
z BMS interface (BMS protocol) for data exchange with other Bender devices
(RS485 electrically isolated).
z Internal disconnection of the A-ISOMETER from the IT system to be monitored
(using a control signal; terminals F1/F2) , e.g. if several A-ISOMETERs® are interconnected.
z Current output 0(4)...20mA (galvanically separated) in relation to the meas-
ured insulation value.
z Remote setting of certain parameters via the Internet (option; FTC470XET
additionally required)
can be extended via coupling
n
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Function
2.3 Product description
The A-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
U
.
n
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.
2.4 Function
The A-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.
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
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Function
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 behaviour can also be set in the "ISO SETUP" menu, by selecting the sub 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 A-ISOMETER®
IRDH275 provides comprehensive self test functions. After switching the
supply voltage on, all internal measuring functions, the components of the
process control such as data and parameter 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.
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.
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Error message Meaning Steps to be taken
1. Check the wiring of terminal L1, L2 to
the IT system
2. Press the test button
3. Switch the supply voltage off and on.
4. 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
1. Press TEST button
2. Switch the supply voltage off and on
3. Contact BENDER
System connection?
Connection PE?
Device error x
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.
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)
Internal device
error
Function
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Function
2.5 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 43, 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 A-ISOMETERs® in IT systems, make sure that only one active
A-ISOMETER® is connected in each interconnected system. If IT systems are
interconnected via coupling switches, make sure that A-ISOMETERs® not
currently 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
A-ISOMETERs® is required.
Function input F1/F2 for connection or disconnection of
IT systems being monitored
The A-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 in-
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Function
sulation 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 A-ISOMETER® is active in each galvanically connected system. In a ringtype arrangement with all coupling switches closed, it can be assumed that
all A-ISOMETER®s are deactivated. In order to prevent this, a BMS Master
(IRDH275B BMS address 1) monitors the condition of the function input F1/
F2 of all slave A-ISOMETERs®. When all slave A-ISOMETERs® are in the
STANDBY mode, the insulation monitoring function of the Master
A-ISOMETER® and hence the function input F1/F2 of the Master are without
function in this mode.
Details are shown in the graphic below.
BMS bus (A/B, RS485)
16
Addr. 1
PE PE
F1/F2
IRDH275B
F1/F2
IRDH275B
G
Addr. 2
G
IT system 1 IT system 2
G
G
IT system 3IT system 4
IRDH275B
PE PE
Addr. 4
F1/F2
F1/F2
IRDH275B
Addr. 3
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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 A-ISOMETER® has finished its measurement cycle, the authorization for
measuring the insulation resistance is passed on from the ISOnet Master to
the next slave. While an A-ISOMETER® is carrying out a measurement all
other A-ISOMETERs® are in the STANDBY mode. In this way it can be prevented that the A-ISOMETERs® disturb each other in interconnected systems. In comparison to the solution coupling 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. When the ISOnet function is activated, the function input F1/F2
will be disconnected.
BMS bus (A/B, RS485)
G
G
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IRDH275B
Addr. 1
IRDH275B
PE PE
IT system 1 IT system 2
IT system 3IT system 4
IRDH275B
Addr. 4
IRDH275B
PE PE
Addr. 2
G
G
Addr. 3
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Function
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3. Commissioning flow chart (threepart)
Due to limitations of space, the three-part flow chart begins on the next page.
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Commissioning flow chart (threepart)
The encircled figures in the flow chart correspond to the figures in the legend to the wiring diagram.
Commissioning of the A-ISOMETER® (1)
Is the system to be monitored an
unearthed system (IT system)?
no
The IRDH275 is not suitable for this
application( contact BENDER).
Is the maximum nominal voltage
AC 793 V
U
n
or Un DC 650 V
no
Un is too high for direct
connection. A coupling device
providing the respective voltage
range must be connected.
Deenergize the installation
before connecting the device!
yes
Device connection Optional device
The two PE connections
be connected separately to the
equipotential bonding.
The terminals L1 and L2 must be
connected to Un of the system to be monitored according to the wiring diagram.
Connect the supply voltage Us
to the terminals A1/+ and A2/-. Consider
the details indicated on the nameplate.
Recommended wire cross section of
connecting cable
single wire 0.2...4 mm
flexible 0.2... 2.5 mm
and KE must
6
2
3
4
5
1
2
2
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
External TEST button (NO contact) to the
terminals T1 and T2
External RESET button (NC contact) to the
terminals R1 and R2
yes
connection
10
7
8
When using the RS485 interface, take care
that a 120 W resistor is connected at
the beginning and the end of the network.
20
11
The output contacts of the alarm relays
System fault (21-22-24)
Alarm 1 (11-12-14)
Alarm 2 (21-22-24)
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Commissioning flow chart (threepart)
Commissioning of the A-ISOMETER® (2)
Connect the supply
voltage U
Connect the voltage Un of the
IT system to be monitored
Only IRDH275B:
set the clock
S
The A-ISOMETER carries out a
self test. The display indicates
the insulation value after finishing
the measurement.
Shall the basic setting
be changed?
Alarm1 = 40 kW
Alarm2 = 10 kW
K1/K2 = N/O operation
Memory = off
no
Does one of the alarm LEDs
light up?
no
yes
yes
Select ISO SETUP
(see chapter operation and setting)
The insulation value of the system
being monitored is below the preset
response value. Change the response
value or improve the insulation
condition of the system.
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Commissioning of the A-ISOMETER® (3)
In order to check the proper
connection, a functional test
using a suitable resistance is
to be carried out.
Size of the resistance:
50% of the preset response
value Alarm 2.
Commissioning flow chart (threepart)
Do both alarm LEDs light up?
Did the alarm relays switch ?
yes
Remove the resistor !
Alarm LEDs extinguished ?
Did the output relays change
their position ?
yes
The IRDH275 is correctly
connected and functions reliably !
no
no
yes
Check the connecting leads !
Is voltage Un applied to the
terminals L1/L2 ?
When a coupling device is
used, is it correctly connected ?
Check the voltages with a voltmeter !
Do both alarm LEDs light ?
Did the alarm relays switch?
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4. Connection
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).
Devices for protection against short-circuit in conformity with IEC 60364-443 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
short-circuit-proof and earth-fault-proof wiring is recommended).
Only one A-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 A-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.
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3 AC - System
3
3/N AC - System
2
Connection
U
n
L2
L1
U
n
L1
L2
L3
N
L1
L2
L3
AC - System
U
n
DC - System
U
n
L1
4
L2
L2L1
L+
5
L-
+/~
-
/~
U
s
L2L1
L2L1
1
A1/+ A2/- L1 L2 AK KE
IRDH275(B)
T1 T2 R1 R2 F1 F2 M+ M- A B 11 12 14 21 22 24
mA
7 8 9 10 11 12 13
120W
K1
6
PE
K2
24
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Connection
Legend to wiring diagram:
1 Supply voltage U
(see nameplate) via 6 A fuse
s
2, 3 Connection to the 3AC system to be monitored:
connect terminals L1, L2 to neutral conductor N or
terminals L1, L2 to conductor L1, L2
4 Connection to the AC system to be monitored:
connect terminals L1, L2 to conductor L1, L2
5 Connection to the DC system to be monitored:
connect terminal L1 to conductor L+, terminal L2 to conductor L-
6 Separate connection of and KE to PE
7 External TEST button (NO contact)
8 External RESET button (NC contact or wire jumper),
when the terminals are open, the fault message will not be stored
9 STANDBY by means of the function input F1, F2:
When the contact is closed, insulation measurement does not take
place;
system disconnection
10 IRDH275: current output, galvanically separated: 0...400 μA
IRDH275B: current output, galvanically separated:
0...20 mA or 4...20 mA
11 Serial interface RS485 (termination 120 Ω resistor)
12 Alarm relay 1; changeover contacts provided
13 Alarm relay 2; (device fault relay) changeover contacts provided
TGH1361en/11.2009
25
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Connection
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 A-ISOMETER® this coupling device extends the nominal
voltage range to DC 1760 V in DC systems.
AK160
AGH150W-4
Achtung Hochspannung
IRDH275
AK
KE
Danger High Voltage
+ -
U
n
DC 0 ... 1760 V
26
L+
L-
PE
TGH1361en/11.2009
Page 27
Connection
4.2.2 Connection with AGH520S
Connected to the A-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.
Un 3/(N)/ AC 0...7200 V 42...460 Hz
3/N/ AC
AK
KE
IRDH275
L1
L2
L3
N
3 AC
2
AGH520S
534
PE
TGH1361en/11.2009
27
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Connection
4.2.3 Connection with AGH204S-4
This coupling device extends the nominal voltage range of A-ISOMETERs®
used in AC systems including rectifiers.
1
2
AK160
AK80
IRDH275
AK
KE
U3
AGH204S-4
V3
W3
1 without rectifiers
2 with rectifiers
Un
U
= 3AC 0....1650 V (DC max. 1000 V)
n
= 3AC 0....1300 V (max. AC voltage; max. DC voltage
U
n
after rectifiers in intermediate circuits of frequency con-
L1
L2
L3
N
PE
verters:1840 V)
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.
28
TGH1361en/11.2009
Page 29
Connection
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
TGH1361en/11.2009
29
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Connection
30
TGH1361en/11.2009
Page 31
5. Operation and setting
5.1 Operating features and displays IRDH275(B)
A-ISOMETER® IRDH275
***IT-SYSTEM****
k
R =086kW H
ESC
INFO TEST RESET MENU
1234 56
1 INFO key: to query standard information /
ESC key: back (menu function), confirmation parameter change
2 TEST button: to call up the self test/
Up key: parameter change, moving up in the menu
3 RESET button: to delete insulation fault alarms
Down key: parameter change, moving down in the menu
4 MENU key: to activate the menu system / Enter key: confirmation param-
eter change
5 Alarm LED 1 lights: insulation fault, first warning level reached
6 Alarm LED 2 lights: insulation fault, second warning level reached
7 Device fault LED lights: IRDH275 defective
8 Two-line display for standard and menu mode
A detailed description of the operating elements is given on the following
pages.
2
1
7
TGH1361en/11.2009
31
Page 32
5.1.1 Display in the standard mode
Operation and setting
Insulation Fault
1
Rs=011k
2
1 Indication of the insulation resistance in kΩ
2 Additional information about the insulation
resistance:
"+" = insulation fault at L+
"–" = insulation fault at L–
"s" = new measurement has started
3 = polarity of the measuring pulse
. = valid bus communication signals
H = new entry in the memory data base
C = flashing, clock is to be set
4 Messages:
- Insulation fault
- Connection system?
- Connection PE?
- Device error x
- *****STAND BY*****
5.1.2 Display in the menu mode
W . H
4
3
32
1. EXIT
2. HISTORY INFO
Parameter change is permitted
Parameter change is blocked,
enabling by a password
TGH1361en/11.2009
Page 33
Operation and setting
5.1.3 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
ESC
INFO
without opening the menu:
z Device name, firmware version
z Response values Alarm 1 and Alarm 2
z Leakage capacitance C
(only indication if insulation
e
resistances > 20 kΩ)
z Setup status (for details refer to the table of the status
numbers on page 68)
z 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.
Activating the TEST button starts the
A-ISOMETER® self test.
TEST RESET
Pressing the RESET button resets insulation fault
alarms stored in the A-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 A-ISOMETER®
can only be reset when the present insulation value is 25 % higher than the
set response value.
MENU
TGH1361en/11.2009
The menu system is called up by pressing the MENU key.
33
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Operation and setting
For controlling the menu system, the arrow keys, the ENTER key and the ESC
key are used:
Arrow up key:
TEST
Moving up in the menu, increasing a parameter
Arrow down key:
RESET
Moving down in the menu, reducing a parameter
ENTER key
MENU
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:
ESC
INFO
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:
ESC
34
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Page 35
Operation and setting
TGH1361en/11.2009
35
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Operation and setting
5.2 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.
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.
36
TGH1361en/11.2009
Page 37
Operation and setting
5.2.1 Diagram menu structure
Nr.: 01 #Nr.: 02
Power on
*** IT-SYSTEM ***
R >010 MW H
ESC
ISO ADVANCEDISO SETUPHISTORY INFO COM SETUP 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
MENU
1. EXIT
2. HISTORY INFO
3. ISO SETUP
4. ISO ADVANCED
5. COM SETUP
6. PASSWORD
7. LANGUAGE
8. SERVICE
ESC
PASSWORD
1. Exit
2. Password: XXX
3. Status: off
LANGUAGE
Insert Service
Password: XXX
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
IRDH275B
TGH1361en/11.2009
1. Exit
2. Addr: 003
3. ISONet: off
4. ISO Monitor
1. Exit
2. Text: Deutsch
IRDH275
37
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Operation and setting
5.3 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.
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
3...99 Response value Alarm 1 cleared
3...99 Response value Alarm 2 released
3...99 Response value Alarm 2 cleared
3...99 Error system connection released
3...99 Error system connection cleared
3...99 Error PE connection released
3...99 Error PE connection cleared
3...99 Device error released
3...99 Device error cleared
3...99 System reset (watchdog) System reset
Alarm1
Alarm1
Alarm2
Alarm2
System connection?
System connection?
PE connection?
PE connection?
Device error
Device error
Before storing the events with the actual date and time stamp, set the
real-time clock in the ISO ADVANCED menu (refer to page 45).
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.
38
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Operation and setting
5.3.1 Diagram HISTORY INFO (IRDH275B)
*** IT-SYSTEM ***
R >010 MW H
1. EXIT
2. HISTORY INFO
3. ISO SETUP
4. ISO ADVANCED
5. COM SETUP
6. PASSWORD
7. LANGUAGE
8. SERVICE
ESC
Nr.: 01 #Nr: 08
Power on
Nr.: 01 #Nr: 08
Clear all: off
IRDH275B
TGH1361en/11.2009
Nr.: 01 #Nr: 08
28.08.01 17:43
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
Nr.: 02 #Nr: 08
Clear all: off
IRDH275
39
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Operation and setting
5.4 Menu ISO SETUP: Setting of the basic A-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.
5.4.1 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.
5.4.2 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.
K1: N.C Test = N/C operation contacts 11-12-14, with relay test
(the alarm relay is energized during normal operation)
K1: N.O Test = N/O operation contacts 11-12-14, with relay test
(the alarm relay is deenergized during normal operation)
K1: N.C = N/C operation contacts 11-12-14, without relay test
(the alarm relay is energized during normal operation)
K1: N.O = N/O operation contacts 11-12-14, without relay test
(the alarm relay is deenergized during normal operation)
K1: Flash = Flashing function contacts 11-12-14
(the alarm relay and the LED flash in the event of an alarm
message, approximately 0.5 Hz
K2: N.C Test = N/C operation contacts 21-22-24, with relay test
(the alarm relay is energized during normal operation)
K2: N.O Test = N/O operation contacts 21-22-24, with relay test
(the alarm relay is deenergized during normal operation)
K2 : N.C = N/C operation contacts 21-22-24, without relay test
(the alarm relay is energized during normal operation)
K2 : N.O = N/O operation contacts 21-22-24, without relay test
(the alarm relay is deenergized during normal operation)
K2 : Flash = Flashing function contacts 21-22-24
(the alarm relay and the LED flash in the event of an alarm
message, approximately 0.5 Hz)
40
TGH1361en/11.2009
Page 41
Operation and setting
Diagram ISO SETUP
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
*** IT-SYSTEM ***
R >010 MW H
1. EXIT
2. HISTORY INFO
3. ISO SETUP
4. ISO ADVANCED
5. COM SETUP
6. PASSWORD
7. LANGUAGE
8. SERVICE
Alarm1 : 100 KW
Alarm2 : 200 KW
IRDH275B
TGH1361en/11.2009
K2: N.O
Memory: off
M+/M-: 0-20 mA
K1: N.O
Memory: on
Memory: off
M+/M-: 0-20 mA
M+/M-: 4-20 mA
K1: N.O Test
K1: N.C Test
K1: Flash
K1: N.O
K1: N.C
IRDH275
41
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Operation and setting
During the automatic self test, the alarm relays are not switched
over.
When a device fault occurs at the A-ISOMETER®, the relay K2 will automatically be activated as a device fault relay.
5.4.3 Memory setting (on/off)
Memory: on = Fault memory is activated
The device must be reset with the RESET button after
clearing the fault.
Memory: off = Fault memory deactivated (factory setting)
5.4.4 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:
R
= insulation fault, I= current in mA
F
20 mA x 120 kW
RF =
16 mA x 120 kW
RF =
I
I - 4 mA
The associated characteristic curves are illustrated on page 66.
42
TGH1361en/11.2009
- 120 kW
- 120 kW
Page 43
Operation and setting
5.5 Menu ISO ADVANCED: Setting of the extended functions
5.5.1 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 28).
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
with an output voltage not exceeding DC 1000 V are allowed to be connected.
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 "operation with coupling device" on page 28).
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.
The coupling monitoring is deactivated when an external coupling
device is connected.
TGH1361en/11.2009
43
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Operation and setting
5.5.2 Adaptation to the system leakage capacitance (Cemax: 150 µF)
This menu allows to adapt the A-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
= 500 µF.
e
Factory setting = 150 µF.
5.5.3 Changing the measuring principle from AMP to DC (Measure: AMP)
The DC measuring principle is only suitable for pure AC systems.
Factory setting = AMP.
5.5.4 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
5.5.5 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.
5.5.6 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.
5.5.7 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.
44
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Page 45
Operation and setting
5.5.8 Diagram ISO ADVANCED
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
*** IT-SYSTEM ***
R >010 MW H
1. EXIT
2. HISTORY INFO
3. ISO SETUP
4. ISO ADVANCED
5. COM SETUP
6. PASSWORD
7. LANGUAGE
8. SERVICE
Ce max : 150µF
Measure: AMP
no
150 AK160
204 AK160
520S
204 AK80
AGH: no
150µF
500µF
DC
AMP
IRDH275B
TGH1361en/11.2009
Date: 01.01.01
Test: 00:00
Autotest: 24h
Clock: 21:09
00:00
23:00
24h
no
01h
.
.
.
IRDH275
45
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Operation and setting
5.6 Menu COM SETUP: Setting the BMS interface
5.6.1 Bus address „Addr:“ (IRDH275B)
This menu item is used to set the BMS bus address of the IRDH275. Since
there are several A-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
A-ISOMETERs must be assigned one after the other, since only one device may represent the Master.
5.6.2 ISOnet function (IRDH275B)
In the ISOnet = ON sub menu of the COM SETUP, the ISOnet function can
be set. The ISOnet function of all A-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 A-ISOMETER® has completed the measuring
cycle, the permission for insulation measurement is given from the ISOnet
Master to the next slave. During the measurement process carried out by an
A-ISOMETER®, all other A-ISOMETERs® are in the STANDBY mode.
5.6.3 ISO monitor (IRDH275B)
This function allows to query the current measured value as well as the messages of all bus-capable A-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 A-ISOMETER®, the
message "!!!!NO DATA!!!!" will be displayed.
<<Bus SCANNING>>
Information is being searched
No data found
Current data address 03
46
R= K ADR:02
!!!!NO DATA!!!!
R= K ADR:02
Insulation Fault
R= 010K ADR:03
TGH1361en/11.2009
Page 47
Operation and setting
5.6.4 Diagram COM SETUP (IRDH275B)
1. Exit
2. Addr: 003
3. ISONet: off
4. ISO Monitor
*** IT-SYSTEM ***
R >010 MW H
1. EXIT
2. HISTORY INFO
3. ISO SETUP
4. ISO ADVANCED
5. COM SETUP
6. PASSWORD
7. LANGUAGE
8. SERVICE
Addr : 003
ADR: 001
.
.
.
ADR: 030
IRDH275
IRDH275B
TGH1361en/11.2009
ISONet : off
! ! ! ! NO DATA ! ! ! !
R= ADR: 01
ADR: 01
.
.
.
ADR: 30
ISONet : off
ISONet : on
47
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Operation and setting
5.7 Menu PASSWORD
5.7.1 Activating and setting the password
This menu can be used to activate a "Password" query. This protects the AISOMETER® against unauthorized settings and modifications. The desired
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.
5.7.2 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
48
1. Exit
2. Password: XXX
3. Status: off
Password: XXX
Password: XXX
Password: 000
Password: . . .
Password: 999
Status: off
Status: off
Status: on
TGH1361en/11.2009
Page 49
Operation and setting
5.8 Menu LANGUAGE
5.8.1 Setting the national language
The menu item "Language" allows fault messages of the A-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.
5.8.2 Diagram Language
*** 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
TGH1361en/11.2009
2. Text: Deutsch
2. Text: Deutsch
2. Text: English
49
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Operation and setting
5.9 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.
5.10 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 our protocol converter FTC470XET (BMS <==> Ethernet/TCP/IP) are required.
Remote setting is possible for:
z Response value Alarm 1 (1...10,000 kΩ) (Y1)
z Response value Alarm 2 (1...10,000 kΩ) (Y2)
z Operating principle alarm relay 1 (e.g. N/O operation)
z Operating principle alarm relay 2 (e.g. N/O operation)
z Measuring principle (AMP or DC)
z Current output ranges for external measuring instruments (0/4...20 mA)
z Maximum system leakage capacitance (150 μF or 500 μF)
z Time for repetition of the automatic self test (off/ 1 h/ 24 h
z Starting time of the automatic self test (0.00...23.00 h)
z Language of the alarm messages to be displayed (D, GB)
z Setting the fault memory to ON or OFF
50
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Page 51
6. Serial interfaces
The A-ISOMETERs® IRDH275 and IRDH275B have differently designed serial interfaces.
-RS485 and IsoData protocol
IRDH275
IRDH275B
6.1 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:
z RS485 interface galvanically isolated from the device electronics
z Connection to terminal A and B
z Maximum cable length 1200 m
z Transmission protocol 9600 baud - 1 start bit - 1 stop bit - 8 data bit
z After each valid measurement, the following data block is provided:
-galvanically isolated
-ASCII, unidirectional
-RS485 and BMS protocol
-galvanically isolated
-ASCII, bidirectional
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Serial interfaces
Start US= Unit separator
02H0FH30H30
30H30
Alarm2 e.g. 120 kW
Example: terminal display
Measuring value
128 KW
H
30H31H32H38
Measuring value
e.g. 128 kW
H
30H31H32H30
Response value
Alarm1
60 KW
US US
H
0FH30H30
US US
H
0FH30H0FH30
30H = K1 off, K2 off
31H = K1 on, K2 off
32
H
= K1 off, K2 on
33H = K1 on, K2 on
Alarm2
120 KW
30H30H36H30H0F
H
Response value
Alarm1 e.g. 60 kW
US US End
0FH30H0FH03
H
30
H
= No alarm
31
H
= Alarm1
32
H
= Alarm2
33H = Alarm1/2
AC fault
Alarm2
K1 off, K2 on
H
= AC fault
30
31
H
= DC- fault
32H = DC+ fault
H
H
10H13
LF CR
H
52
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Serial interfaces
6.2 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.
1st device ... device last device
AB AB AB
120 W
0.4 W
TGH1361en/11.2009
Stub feeder
maximum 1 m
Maximum length of the RS485 bus: 1200 m
120 W
0.4 W
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Serial interfaces
6.3 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.
6.3.1 Correct arrangement
Three examples for correct arrangement:
6.3.2 Wrong arrangement
Three examples for wrong arrangement:
6.3.3 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.
54
33
1
32
DI1
64
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Serial interfaces
6.4 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:
z Baud rate:9600 baud
z transmission:1 start bit, 7 data bits, 1 parity bit, 1 stop bit (1, 7, E, 1)
z Parity:even
z 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.
6.4.1 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.
Fault RS485
Rs=011k
Faults may be caused when:
z addresses are assigned twice
z a second master exists on the BMS bus
z interference signals occur on the bus lines
z a defective device is connected to the bus
z terminating resistors are not activated
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Serial interfaces
6.4.2 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.
***IT-SYSTEM***
R+=500K
Flashing point:
BMS data received
If no flashing point appears, it may be attributed to the following:
z no Master available in the network
z more than one Master available in the network
z RS485 interface (terminal A/B) not connected or reversed
56
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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
Insulation Fault
Insulation Fault
Connection system
Connection PE
Device error
Channel
1
2
3
4
5
Meaning
Insulation resistance < setting Alarm 1
Insulation resistance < setting Alarm 2
Connection error L1/L2 against system
Connection error /KE against PE conductor
Internal device error
The BMS function is completely available in the standby mode (Stand-by: F1/
F2).
6.4.3 Commissioning of an RS485 network with BMS protocol
z Connect the terminals A and B of all bus nodes in one line
z 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.
z Switch the supply voltage U
z Determine one IRDH275 as the Master and assign address 1.
z Assign the addresses (2...30) subsequently to all other IRDH275B devices and
S
on.
other bus nodes (see table below).
z Check whether a flashing point appears on all devices
(BMS commands are being received).
z The sub menu "ISO-Monitor" in the COM SETUP menu allows insulation values
of the A-ISOMETERs® to be queried. Before starting the query, the
address of the A-ISOMETER® has to be entered.
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BMS-bus address ranges
Addresses* Device Meaning
There is no device with address 0 !
0
Information sent to address 0 applies to all devices
connected to the interface (broadcast)
1 PRC1470 Control and indicating device
IRDH275B/
1...30
375B/575
Insulation monitoring device
1...30 FTC470... 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
When assigning addresses, take care that there are no gaps greater
than five in the respective ranges (1...30, 31...60, 61...90, 111...119
and 121...151).
Serial interfaces
58
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7. Technical data IRDH275(B)
7.1 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
Absolute error (1 kΩ...10 kΩ) ........................................................................................................ +2 kΩ
Relative percentage error (10 kΩ...10 MΩ)......................................................................... 0%...+20 %
Response time t
an
Measuring time..................................................................................................... see characteristic curve
Hysteresis (1 k
Ω...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 64) .............................50...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
Measuring circuit
Measuring voltage Um ................................................................................................................... ≤ 50 V
Measuring current I
Internal DC resistance R
max. (at RF = 0 Ω) ............................................................................... ≤ 280 μA
m
............................................................................................................ ≥ 180 kΩ
i
Internal impedance Zi, at50 Hz ................................................................................................. ≥ 180 kΩ
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Technical data IRDH275(B)
Permissible extraneous DC voltage Ufg................................................................................ ≤ DC 1200 V
Permissible system leakage capacitance C
............................................................................. ≤ 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 k
Ω...10 MΩ
Relative percentage error (1 kΩ...10 MΩ).................................................................................... ±1 kΩ
Relative percentage error (10 kΩ...10 MΩ) ..................................................................... ±10%
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 k
Current output IRDH275 (load)................................................................................. 400 μA (≤ 12.5 k
Current output IRDH275B (load)................................................................................... 20 mA (≤ 500
Accuracy current output (1 k
Serial interface
Ω...1 MΩ) ........................................................................ ±10%, ±1 kΩ
Ω):....................................
Ω)
Ω)
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
Terminating resistor ............................................................................................................ 120
2
, e.g. J-Y(St)Y 2 x 0.6
Ω (0.5 W)
Device address, BMS bus................................................................................ 1...30 (factory setting = 3)
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)
60
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Technical data IRDH275(B)
General data
EMC immunity ................................................................................................................. acc. to EN 61326
EMC emission .................................................................................................................. acc. to EN 61326
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
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 V1.4
Software version IRDH275B ...................................................................................................... D159 V1.4
Weight approx. .................................................................................................................................. 510 g
2
2
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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Technical data IRDH275(B)
7.2 Standards and approvals
The A-ISOMETER® was designed under consideration of the following
standards:
- DIN EN 61557-8 (VDE 0413-8):1998-05
- EN 61557-8:1997-03
- IEC 61557-8:1997-02
- EN 61326
- DIN EN 60664-1 (VDE 0110-1):2003-11
- DIN EN 60664-3 (VDE 0110-3):2003-09
- ASTM F1669M-96(2002)
- ASTM F1207M-96(2002)
62
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Technical data IRDH275(B)
≤
Ω
≥
Ω
7.3 Characteristic curves
A-ISOMETER® response times in relation to system leakage capacitances of:
C
= 1...500 µF, Un = 0...793 V / 50 Hz
e
1000
t
[s]
an
100
10
1
1 10 100 1000
C
[μF]
e
10 M
R
0 k
F
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Technical data IRDH275(B)
Max. AC voltage between the IT system and earth in the frequency range <50 Hz
[V]
U
n
10000
AGH520S
AGH204S-4
1000
IRDH275
100
0,1 1 10 100
0,3
f
n
[Hz]
64
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Technical data IRDH275(B)
Current output 0...400 μA (only IRDH275)
R
[ kW]
F
RF =
R
= Insulation fault in kΩ
F
I =Current output in mA
TGH1361en/11.2009
400 mA x 120 kW
I
- 120 kW
I
[ mA]
65
Page 66
Current output 0...20 mA (IRDH275B)
R
[kW]
F
10 000
1000
100
10
1
0 5 10 15 20 25
Technical data IRDH275(B)
I [mA]
20 mA x 120 kW
RF =
R
= Insulation fault in kΩ
F
I =Current output in mA
66
I
- 120 kW
TGH1361en/11.2009
Page 67
Technical data IRDH275(B)
Current output 4...20 mA (IRDH275B)
R
[kW]
F
10 000
1000
100
10
1
0 5 10 15 20 25
I [mA]
RF =
R
= Insulation fault in kΩ
F
I = Current output in mA
TGH1361en/11.2009
16 mA x 120 kW
I - 4 mA
- 120 kW
67
Page 68
Status number
iti
Technical data IRDH275(B)
Value of the respective number
50Hz **
max. filter frequency
10Hz **
max. filter frequency
**
activated
Password protection
DC measuring principle
max. filter frequency 1Hz
Value: 5 ... 9
Value: 5 ... 9
50Hz **
min. filter frequency
10Hz **
min. filter frequency
**
min. filter frequency 1Hz
Value: 5 ... 9
purpose !
0 = 1 = 2 = 3 = 4 =
Cemax 1 μF ** Cemax 10 μF ** Cemax 150 μF Cemax 500 μF
K1: N/O operation Test K1: N/C operation Test K1: flashing function K1: N/O operation K1: N/C operation
on
os
of
numbers
68
1
from the
left
no external coupling AK AGH204S 80K AK AGH520S AK AGH204S 160K AK AGH150W 160K
K2: N/O operation Test K2: N/C operation Test K2: flashing function K2: N/O operation K2: N/C operation
2
3
4
Language German Language English
Self test every 24 hours Self test every hour no periodic self test
5
6
7
principle
activated
Password protection not
8
0.1Hz **
AMP measuring
9
min. filter frequency
max. filter frequency
10
11
0,1Hz **
BMS mode ** Isodata ** test data **
place IRDH275
Bus address in the tens
12
13
TGH1361en/11.2009
place IRDH275
Bus address in the units
14
** The parameters marked with two asterisks are settable via the Service menu item! A password is required for that
Number of pulses 2-9 **
15
Page 69
Technical data IRDH275(B)
Dimension diagram enclosure IRDH275(B)
ø 4,5 mm
z DIN rail mounting according to IEC 60715
or
z Screw mounting
by means of a plug-in trapezoidal support
Order No.: 990056 (Option W)
81 mm
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7.4 Ordering details
7.4.1 A-ISOMETER®
Technical data IRDH275(B)
Typ e
IRDH275-435
IRDH275W-435 „ „ B 9106 5100W
IRDH275B-435 „ „ B 9106 5101
IRDH275BW-435 „ „ B 9106 5101W
IRDH275-427 „ DC 19.2...72 V B 9106 5104
IRDH275W-427 „ „ B 9106 5104W
IRDH275B-427 „ „ B 9106 5105
IRDH275BW-427 „ „ B 9106 5105W
IRDH275-425 „ 10,2...36 V B 9106 5108
IRDH275B-425 „ „ B 9106 5109
Nominal voltage
U
n
3(N)AC 0...793 V
DC 0...650 V
Supply voltage
U
s
AC 88...264 V
DC 77...286 V
Art.-No.
B 9106 5100
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 36 and in the product and function description on page 12.
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.
70
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Technical data IRDH275(B)
7.4.2 Coupling devices
Type Nominal voltage Art. No.
range U
n
AGH204S-4 AC 0...1650 V B 914 013
AGH520S AC 0...7200 V B 913 033
AGH150W-4 DC 0...1760 V B 9801 8006
7.4.3 Measuring instruments
Type Measuring range Dimensions Art. No.
7204-1421 0...400 µA 72 x 72 mm B 986 763
9604-1421 0...400 µA 96 x 96 mm B 986 764
7204S-1421 0...400 µA 72 x 72 mm B 986 804
9604S-1421 0...400 µA 96 x 96 mm B 986 784
9620-1421 0...20 mA 96 x 96 mm B 986 841
9620S-1421 0...20 mA 96 x 96 mm B 986 842
7.4.4 Label for modified versions
There will only be a label in this field if the A-ISOMETER® is different from
the standard version.
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71
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Technical data IRDH275(B)
72
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Page 73
INDEX
A
Additional characteristics IRDH275B 11
AGH... 26
Alarm LED 1 31
Alarm LED 2 31
Alarm messages 57
Approvals 62
Automatic self test 44
B
Bender Measuring Device Interface 55
BMS bus
- correct arrangement
- wrong arrangement 54
BMS-bus
- address ranges
BMS-bus address ranges 58
BMS-Master 55
BMS-Slave 56
54
58
C
Changing the measuring principle 44
Characteristic curves 63
Commissioning flow chart 19
Commissioning of a BMS network 57
Common characteristics 11
Coupling devices
- ordering details
- wiring diagram 26
Current output 0...400 mA 65
Current output 4...20 mA 67
71
D
Device fault LED 13
Dimension diagram enclosure IRDH275
69
Directions for installation 10
Display in the menu mode 32
Display in the standard mode 32
E
Explanations of symbols and warnings 9
External coupling devices 43
External RESET button 25
External TEST button 25
F
Factory setting 10
Fault memory ON/OFF 42
Flashing point 56
Function 12
Function input F1/F2 15
H
Historical memory 38
I
INFO key 31
Inspection, transport and storage 9
Interconnected systems 15
ISO monitor (IRDH275B) 46
IsoData protocol 51
TGH1361en/11.2009
73
Page 74
INDEX
M
Measuring instruments 71
Memory database 38
Menu
- COM SETUP
- HISTORY INFO 39
- ISO ADVANCED 43
- ISO SETUP 40
- LANGUAGE 49
- PASSWORD 48
- SERVICE 50
Menu structure 37
46
O
Operating features and displays 31
Option „W“ 11
Ordering details 70
P
Parameterization via Internet 50
Product description 12
R
Real-time clock 15
RESET button 12, 31
RS485 interface 53
Setting the response values Alarm 1 and
Alarm 2
40
Setting the system leakage capacitance 44
Standards 62
Status number 68
T
Technical data IRDH275 59
Terminating resistor 53
TEST button 31
Topology (IRDH275B) 54
W
Wiring diagram A-ISOMETER 25
Wiring of the RS485 network 54
Wrong arrangement 54
S
Self test, A-ISOMETER 31
Setting the bus address for IRDH275B 46
Setting the date (IRDH275B) 44
Setting the language of the fault message
49
Setting the operating principle of the
alarm relays
Setting the password 48
Setting the real-time clock 44
40
74
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Page 76
Dipl.-Ing. W. Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Grünberg • Germany
Postfach 1161 • 35301 Grünberg • Germany
Tel.: +49 6401-807-0
Fax: +49 6401-807-259
E-Mail: info@bender-de.com
Web: http://www.bender-de.com
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