Bender ISOMETER isoRW425 User Manual
Manual
ISOMETER® isoRW425
Insulation monitoring device for unearthed
IT AC-, AC/DC and DC systems
for railway applications up to AC/DC 400 V
Software version: D418 V1.0x
isoRW425_D00052_01_M_XXEN / 03.2014
Bender GmbH & Co. KG
Londorfer Str. 65 • 35305 Grünberg • Germany
P.O. Box 1161 • 35301 Grünberg • Germany
Tel.: +49 6401 807-0
Fax: +49 6401 807-259
E-Mail: info@bender.de
Web: http://www.bender.de
© Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
Table of Contents
1. Making effective use of this document ....................................................... 5
1.1 How to use this manual ................................................................................. 5
1.2 Information about factory setting ............................................................. 5
2. Safety instructions ........................................................................................... 7
2.1 General safety instructions ........................................................................... 7
2.2 Work activities on electrical installations ................................................ 7
2.3 Intended use ...................................................................................................... 7
3. Function ............................................................................................................. 9
3.1 Device features ................................................................................................. 9
3.2 Description of function .................................................................................. 9
3.2.1 Undervoltage/overvoltage monitoring ................................................ 11
3.2.2 Connection monitoring .............................................................................. 11
3.2.3 Self test, automatic ....................................................................................... 11
3.2.4 Self test, manual ............................................................................................ 11
3.2.5 Malfunction ..................................................................................................... 12
3.2.6 Assigning alarm categories to alarm relays K1/K2 ............................ 12
3.2.7 Time delays t, ton and toff ....................................................................... 12
3.2.8 Password protection (on, OFF) ................................................................. 13
3.2.9 Automatic adaptation of the pulse duration ...................................... 13
3.2.10 Response time ................................................................................................ 13
3.2.11 Factory setting FAC ...................................................................................... 13
3.2.12 External, combined test resp. reset button T/R .................................. 13
3.2.13 Fault memory ................................................................................................. 13
3.2.14 History memory HiS ...................................................................................... 13
4. Installation, connection and commissioning ........................................... 15
4.1 Installation ....................................................................................................... 15
isoRW425_D00052_01_M_XXEN / 03.2014
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Table of Contents
4.2 Connection ...................................................................................................... 17
4.3 Commissioning .............................................................................................. 20
5. Operation and configuration ...................................................................... 21
5.1 Factory setting ............................................................................................... 21
5.2 Getting to know the user interface ......................................................... 22
5.3 Understand the display elements ........................................................... 23
5.3.1 Querying measured values ........................................................................ 24
5.3.2 Alarm indication when an insulation fault has been detected ..... 26
5.4 Display in menu mode ................................................................................ 27
5.4.1 Querying and setting parameters: Overview ...................................... 27
5.4.2 Navigation within the menu ..................................................................... 28
5.4.3 Selecting menus ............................................................................................ 31
5.4.4 Making settings in the AL menu .............................................................. 33
5.4.5 Making settings in the out menu ............................................................ 35
5.4.6 Making settings in the menu item t ....................................................... 41
5.4.7 Making settings in the SEt menu ............................................................. 43
5.4.8 Querying software number and software version with the INF
menu .................................................................................................................. 47
5.4.9 Querying and clearing the history memory using the HiS menu 47
6. Technical data ................................................................................................ 49
6.1 Tabular presentation .................................................................................... 49
6.2 Standards, approvals and certifications ................................................ 52
6.3 Ordering information ................................................................................... 52
6.4 Error codes ....................................................................................................... 53
INDEX .................................................................................................................... 55
4
isoRW425_D00052_01_M_XXEN / 03.2014
1. Making effective use of this document
1.1 How to use this manual
This manual is intended for electrically skilled persons working in
electrical engineering and electronics!
To make it easier for you to understand and revisit certain sections of text and
instructions in the manual, we have used symbols to identify important instructions and information. The meaning of these symbols is explained below:
Information calling attention to hazards are marked
with this warning symbol.
Information intended to assist the user to make optimum
use of the product are marked with the Info symbol.
1.2 Information about factory setting
If you want to reset the ISOMETER® to its factory setting in a specific case, refer
to page 45; page 21 provides a summary of all factory settings.
isoRW425_D00052_01_M_XXEN / 03.2014
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Making effective use of this document
6
isoRW425_D00052_01_M_XXEN / 03.2014
2. Safety instructions
2.1 General safety instructions
In addition to these operating instructions, the "Important safety instructions
for Bender products“, which are also included in the scope of supply, are an integral part of the device documentation.
2.2 Work activities on electrical installations
Danger as a result of unprofessional work!
Failure to carry out work on electrical installations properly and correctly can put life and limb at risk! Therefore,
observe the following safety instructions!
Only skilled persons are permitted to carry out the work necessary to
install, commission and run a device or system.
Compliance with the applicable regulations governing work on electri-
cal installations and with the regulations derived and associated with
them, is mandatory. EN50110 is of particular importance in this regard.
In particular, only test equipment of overvoltage category III or higher
may be used for fault detection.
If the device is being used in a location outside the Federal Republic of
Germany, the applicable local standards and regulations must be complied with. European standard EN 50110 can be used as a guide.
2.3 Intended use
The isoRW425 ISOMETER® monitors the insulation resistance of unearthed
AC/C main circuits (IT systems) with mains voltages of AC, AC/DC …V or
DC 0…400 V.
isoRW425_D00052_01_M_XXEN / 03.2014
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Safety instructions
DC components existing in AC/DC systems do not influence the operating
characteristics. A separate supply voltage allows de-energised systems to be
monitored too. The maximum permissible system leakage capacitance is
300µF.
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isoRW425_D00052_01_M_XXEN / 03.2014
3. Function
3.1 Device features
Insulation monitoring for unearthed AC and DC systems with galvani-
cally connected rectifiers or inverters
Two separately adjustable response ranges of 1…990 k (Alarm 1,
Alarm 2)
Automatic adaptation to the system leakage capacitance up to 300 F
Measured value display via multi-functional LCD
Measurement of the nominal system voltage (RMS) with undervoltage
and overvoltage detection
Measurement of DC voltages system to earth (L+/PE and L-/PE)
Alarm signalling via LEDs (AL1, AL2), display and alarm relays (K1, K2)
N/C operation or N/O operation selectable
Automatic device self test
BMS interface (Bender measuring device interface) for data exchange
with other Bender components; RS-485 electrically isolated
Start-up delay, response delay and delay on release
Password protection to prevent unauthorised changes being made to
device settings
Fault memory can be activated
Connection monitoring
3.2 Description of function
The isoPV425 runs a device test when the supply voltage is connected. and
the start-up delay has elapsed. Then, the insulation resistance of the system is
determined.
When the values are below the set response values R
sponse delay t
relays "K1/K2" switch and the alarm LEDs "AL1/AL2" light up.
begins. Once the response delay "ton" has elapsed, the alarm
on
an1
bzw. R
an2
, the re-
isoRW425_D00052_01_M_XXEN / 03.2014
9
Function
A fault at conductor L+ or L– or a symmetrical insulation fault is shown on the
display. In case of asymmetrical DC faults, a + or a - sign will be displayed in
addition to the value. Pressing the arrow up and down button allows scrolling
up and down in the display via the division of the insulation resistance up to
the percentage value.
The value range to be displayed ranges from -100 % through 0 % to +100 %:
Displays Meaning
–100 % one-side fault at conductor L-
0 % symmetrical fault
+100 % one-side fault at conductor L-
The resistance values can be determined using the following formulas:
R
Fault at conductor L–
Fault at c on ductor L+
= (200 % * RF)/(100 % – R %)
F (–)
= (200 % * RF)/(100 % + R %)
R
F (+)
This could be an indication of the fault location with regard to conductor L+
or L–, also refer to the display in line 11 of the table on page 25.
It is possible to assign the detected fault resp. the faulty conductor to an alarm
relay via the menu.
If the insulation resistance exceeds the release value (response value plus hysteresis) the release delay t
alarm relays will switch back to their initial state and the alarm LEDs AL1/AL2
begins. When the release delay has elapsed, the
off
will go out. If the fault memory is activated, the alarm relays will not switch
back and the LEDs will not go out until the reset button is pressed or the supply voltage is interrupted.
The device function can be tested using the test button T. Parameters are assigned to the device via the LCD and the control buttons on the front panel;
this function can be password-protected. Parameterisation is also possible via
the BMS bus using the BMS Ethernet gateway, e.g. COM460IP.
10
isoRW425_D00052_01_M_XXEN / 03.2014
Function
3.2.1 Undervoltage/overvoltage monitoring
In the response value menu AL both parameters can be activated resp. deactivated. The maximum undervoltage value is limited by the overvoltage value.
3.2.2 Connection monitoring
After connecting to the supply voltage, the following connections are
checked periodically, every 24 h (can be adjusted) or by pressing the test button T:
– Power supply connection L1(+)/L2(–)
– PE connection E/KE
In case of interruption of a connecting lead, the alarm relay K2 switches, the
LEDs
ON/AL1/AL2 flash and a fault message appears on the LC display:
E.01 = Connection fault PE
E.02 = Connection to the system incorrect
E.07 = Fault system leakage capacitance C
E.xx = Internal device error
Once the fault has been eliminated, the alarm relays will switch back to their
initial state either automatically or by pressing the reset button.
Connection monitoring can be switched off in the menu nEt, if required, see
page 45.
> 300 µF
e
3.2.3 Self test, automatic
The device runs a self test after connection to the system to be monitored and
later every 24 hours (selectable: off, 1 h, 24 h). Internal malfunctions detected
during this test are shown on the display as error codes. The alarm relays are
not switched.
3.2.4 Self test, manual
The device runs a self test when the test button is pressed (> 1.5 s). Internal
malfunctions detected during this test are shown on the display as error
codes. The alarm relays are not checked (factory setting). It is possible to
change this setting to "on" in the "out" menu, also see line 26 on page 39. Consequently, the alarm relays would switch during the manual self test.
isoRW425_D00052_01_M_XXEN / 03.2014
11
Function
While the internal test button T is pressed and held, all display elements available for this device are shown. During the test, the display indicates "tES".
3.2.5 Malfunction
In the event of an internal malfunction, all three LEDs will flash. An error code
will appear on the display, refer to page 53.
3.2.6 Assigning alarm categories to alarm relays K1/K2
The alarm categories device error, insulation fault, undervoltage/overvoltage
or alarm triggered by device test can be assigned to the alarm relays via the
"out" menu.
3.2.7 Time delays t, t
The times t, ton and t
relays.
and t
on
described below, delay alarm signalling via LEDs and
off,
off
Start-up delay t
After connection to the supply voltage US, the alarm indication is delayed by
the preset time t (0…10 s).
Response delay t
When the value drops below or exceeds the response value, the device has a
response time t
response delay t
t
and delays alarm signalling (total delay time tan = tae + ton).
ae
If the insulation fault does not continue to exist during the response delay, no
alarm will be signalled.
Delay on release t
If the alarm no longer exists during the response delay and the fault memory
is deactivated, the alarm LEDs will go out and the alarm relays switch back to
their initial state. After activating the delay on release (0…99 s), the alarm
state is continuously maintained for the selected period. If the alarm occurs
again during the delay on release, the device remains in the alarm state.
12
on1/2
that must have elapsed before an alarm is activated. A set
an
(0…99 s) adds up to the device-related operating time
on1/2
off
isoRW425_D00052_01_M_XXEN / 03.2014
Function
3.2.8 Password protection (on, OFF)
If password protection has been activated (on), settings can only be made
subject to the correct password being entered (0…999).
3.2.9 Automatic adaptation of the pulse duration
After connection to the supply voltage, the device automatically adjusts itself
to the leakage capacitance and the insulation resistance of the system to be
monitored. This consequently determines the shortest pulse duration.
In case of system interferences, the required measuring times will be extended, capacitance measurement is also no longer possible.
3.2.10 Response time
The response time tan depends on the insulation resistance and the leakage
capacitance. If, for example, the maximum permissible leakage capacitance is
C
= 300 µF and an insulation fault of RF = 2.5 k (Ran = 5 k) occurs in a 400-
e
V-DC system, the response time would be t
High leakage capacitances and system interferences lead to longer response
times.
< 40 s.
an
3.2.11 Factory setting FAC
Activating the factory setting will reset all modified settings, with the exception of the BMS address, to the default upon delivery.
3.2.12 External, combined test resp. reset button T/R
Reset = Pressing the external button < 1.5 s
Test = Pressing the external button > 1.5 s
3.2.13 Fault memory
It can be activated or deactivated (menu: out/M). Stored alarms can be reset
by means of the reset button R.
3.2.14 History memory HiS
The history memory provides space for exactly one data record consisting of
all current measured values. On the occurrence of the first fault, all the associ-
isoRW425_D00052_01_M_XXEN / 03.2014
13
Function
ated measured values from the fault memory are imported to the history
memory. This data can be read out using the HiS menu item. In order to be
able to record a new data record for a subsequent fault, the history memory
must first be cleared via the menu using the Clr button. Refer to the menu
item HiS starting on page 47.
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isoRW425_D00052_01_M_XXEN / 03.2014
4. Installation, connection and commissioning
Risk of electric shock!
Touching uninsulated live conductors can result in death or serious injury. Therefore avoid any physical contact with active conductors and ensure compliance with the regulations for working
on electrical installations.
isoRW425 complies with the EMC limits for Class A devices intended for use in industrial environments. In case of interferences, the operator may be required to take adequate counter
measures.
4.1 Installation
Mounting on a DIN rail:
Snap the mounting clip at the rear of the device onto the DIN rail so
that it sits securely or
Screw fixing:
Use a tool to position the rear mounting clips so that they project
beyond the enclosure (a second. mounting clip is required, see order-
ing information). Fix the device with two M4 screws, see the following
sketch.
isoRW425_D00052_01_M_XXEN / 03.2014
15
Installation, connection and commissioning
1
2
3
100 mm
116 mm
Zubehör/
Accessory
Dimension diagram, sketch for screw mounting, push-wire terminal connection:
70,5
47,5
36 mm
31,1
2
67,5
45
The front plate cover can be opened at the lower part marked with an arrow.
90 mm
2
16
isoRW425_D00052_01_M_XXEN / 03.2014
Installation, connection and commissioning
4.2 Connection
Connect the terminals A1 and A2 to the supply voltage according to
IEC 60364-4-43, i.e. the connections are to be protected against short-circuit
by means of a protective device (a 6 A fuse is recommended).
Devices for protection against short-circuit in conformity with IEC 0100-430
for the coupling of terminals L1/L2 to the IT system to be monitored 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.
Only one ISOMETER® may be controlled via a test/reset button. It is not allowed to use a parallel connection of several test or reset inputs for testing
multiple ISOMETER®s.
For UL application:
Only use 60/70 °C copper lines!
For UL and CSA applications, it is mandatory to use 5 A fuses for the protection
of the supply voltage.
isoRW425_D00052_01_M_XXEN / 03.2014
17
Installation, connection and commissioning
Connect the device as illustrated in the wiring diagram:
U
S
L1/+
L2/
KE A1 A2
E
L1/+
E
L2/-
COM460IP
18
Test / Reset
isoRW425
T/R
K1 K2
T/R
RS-485
11
14
24
on
A
B
off
24 11
14
isoRW425_D00052_01_M_XXEN / 03.2014
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