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Bender ISOMETER isoRW425 Manual

Bender ISOMETER isoRW425 Manual

Insulation monitoring device for unearthed it ac-, ac/dc and dc systems (it systems) for railway applications up to 3(n)ac, ac/dc 440 v
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Manual
ISOMETER® isoRW425
Insulation monitoring device for unearthed
IT AC-, AC/DC and DC systems (IT systems)
for railway applications up to 3(N)AC, AC/DC 440 V
Software version: D0418 V2.xx
isoRW425_D00052_04_M_XXEN/03.2019

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  • Page 1 Manual ISOMETER® isoRW425 Insulation monitoring device for unearthed IT AC-, AC/DC and DC systems (IT systems) for railway applications up to 3(N)AC, AC/DC 440 V Software version: D0418 V2.xx isoRW425_D00052_04_M_XXEN/03.2019...
  • Page 2 P.O. Box 1161 • 35301 Gruenberg • 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! Photos: Bender archives and bendersystembau archives.

  • Page 3: Table Of Contents

    Table of contents 1. Important information ..................6 How to use this manual ................. 6 Technical support: Service and support ..........7 1.2.1 First level support ..................... 7 1.2.2 Repair service ..................... 8 1.2.3 Field service ......................8 Training courses ....................9 Delivery conditions ..................
  • Page 4 Inhaltsverzeichnis 3.2.10 External, combined test or reset button T/R ........23 3.2.11 Fault memory ....................23 3.2.12 History memory HiS ..................24 3.2.13 Interface/protocols ..................24 4. Installation, connection and commissioning ........... 26 Installation ....................... 26 Wiring diagram ....................28 Commissioning ....................
  • Page 5 Inhaltsverzeichnis 7. Data access using the Modbus RTU protocol ........... 43 Reading out the Modbus register from the ISOMETER® ....43 7.1.1 Command of the master to the ISOMETER® ........43 7.1.2 Answer of the ISOMETER® to the master ..........44 Write Modbus register (parameter setting) .........

  • Page 6: Important Information

    1. Important information 1.1 How to use this manual Always keep this manual within easy reach for future reference. To make it easier for you to understand and revisit certain sections in this man- ual, we have used symbols to identify important instructions and information. The meaning of these symbols is explained below: This signal word indicates that there is a high risk of danger that will result in death or serious injury if not avoided.

  • Page 7: Technical Support: Service And Support

    1.2 Technical support: Service and support For commissioning and troubleshooting Bender offers you: 1.2.1 First level support Technical support by phone or e-mail for all Bender products Questions concerning specific customer applications   Commissioning  ...

  • Page 8: Repair Service

      Delivery of replacement devices in the event of faulty or incorrectly   delivered Bender devices Extended warranty for Bender devices with in-house repair service or   replacement device at no extra cost Telephone: +49 6401 807-780** (technical issues)

  • Page 9: Training Courses

    ZVEI (Zentralverband Elektrotechnik- und Elektronikindus- trie e.V.) (German Electrical and Electronic Manufacturers' Association) also applies. Sale and delivery conditions can be obtained from Bender in printed or elec- tronic format. 1.5 Inspection, transport and storage Inspect the dispatch and equipment packaging for damage, and compare the contents of the package with the delivery documents.

  • Page 10: Warranty And Liability

    Important information 1.6 Warranty and liability Warranty and liability claims in the event of injury to persons or damage to property are excluded if they can be attributed to one or more of the follow- ing causes: Improper use of the device. ...

  • Page 11: Disposal

    13th August 2005 must be taken back by the manufacturer and disposed of prop- erly. For more information on the disposal of Bender devices, refer to our homepage at www.bender.de -> Service & support. isoRW425_D00052_04_M_XXEN/03.2019...

  • Page 12: Safety Instructions

    2. Safety instructions 2.1 General safety instructions Part of the device documentation in addition to this manual is the enclosed "Safety instructions for Bender products". 2.2 Work activities on electrical installations Only skilled persons are permitted to carry out the work necessary to install, commission and run a de- vice or system.

  • Page 13: Intended Use

    Safety instructions 2.3 Intended use The ISOMETER® monitors the insulation resistance R (R mode) or the insula- tion impedance Z (Z mode) of unearthed AC/DC main circuits (IT systems) with nominal system voltages of 3(N)AC, AC, AC/DC or DC 0 … 440 V. DC com- ponents existing in 3(N)AC, AC/DC systems do not influence the operating characteristics, when a minimum load current of DC 10 mA flows.

  • Page 14: Function

      RS-485 (galvanically isolated) including the following protocols:   – BMS interface (Bender measuring device interface) for data exchange with other Bender components – Modbus RTU – IsoData (for continuous data output) Password protection to prevent unauthorised parameter changes ...

  • Page 15: Functional Description

    Function 3.2 Functional description The ISOMETER® measures the insulation resistance R and the system leakage capacitance C between the system to be monitored (L1/+, L2/-) and earth (PE). Z mode (selectable in the "SEt" menu) calculates the insulation imped- ance Z from R and C with a system frequency parameter f...

  • Page 16: Monitoring Of The Insulation Resistance (R Mode)

    Function "K2" according to the alarm assignment set in the "out" menu. In addition, the operation of the relay (n.o./n.c.) can be set and the fault memory "M" activat- If the values R or U do not exceed their release value (response value plus hysteresis) for the period t without interruption, the alarm relays will switch back to their initial position and the alarm LEDs "AL1"/"AL2"...

  • Page 17: Monitoring Of The Insulation Impedance (Z Mode)

    Function 3.2.2 Monitoring of the insulation impedance (Z mode) The parameters "Z1" and "Z2" for monitoring the insulation impedance Z available in the "AL" response value menu only when Z mode is activated. The value Z1 must be set higher than value Z2. The insulation impedance Z the selected system frequency f (50 Hz or 60 Hz in the "SEt"...

  • Page 18: Self Test/Error Codes

    Function 3.2.4 Self test/error codes The integrated self-test function checks the function of the insulation moni- toring device and the connection monitoring checks the connections to the system to be monitored. The alarm relays are not switched during the self test. This can be changed using the parameter "test"...
  • Page 19 Function The maximum permissible system leakage capacitance is exceeded Action: E.07 Device not suitable for the existing leakage capacitance: uninstall device. Calibration error during the device test Action: E.08 If the error continues to exist after checking the device con- nections, there is an error inside the device.

  • Page 20: Malfunction

    LEDs "ON"/"AL1"/ "AL2" will flash. If the error occurs again after restarting the device or after a reset to factory settings, then contact Bender Service. 3.2.6 Assignment of the alarm relays K1/K2 The messages "device error", "insulation fault", "insulation impedance fault",...

  • Page 21: Measuring And Response Times

    Function L2/-. If an assignment is not possible, for example in the event of a symmetri- cal insulation fault, the message corresponding to "+" and "-" are shown to- gether. The message "test" indicates a self test. The message "S.AL" indicates a so-called "device start with alarm". After con- necting to the supply voltage U and setting the parameter value to "S.AL = on", the ISOMETER®...
  • Page 22 Function Operating time The operating time t is the time required by the ISOMETER® to determine the measuring value. The insulation resistance measuring value depends on the the insulation resistance R and the system leakage capacitance C . For ex- ample, a maximum permissible system leakage capacitance of C = 300 μF and an insulation fault of R...

  • Page 23: Password Protection (On, Off)

    Function Start-up delay After connection to the supply voltage U the alarm indication for the preset time (0…10 s) in the parameter "t" is suppressed. 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).

  • Page 24: History Memory His

    The ISOMETER® uses the serial hardware interface RS-485 with the following protocols:   The BMS protocol is an essential component of the Bender measuring device interface (BMS bus protocol). ASCII characters are used for the data transfer. Modbus RTU ...
  • Page 25 Function With "Adr = 0", the menu entries baud rate and parity are not shown in the menu and the IsoData protocol is activated. With a valid bus address (i.e. not equal to 0), the menu item "baud rate" is displayed in the menu. The parameter value "---"...

  • Page 26: Installation, Connection And Commissioning

    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 DANGER active conductors and ensure compliance with the regulations for working on electrical installations. If the ISOMETER®...
  • Page 27 Installation, connection and commissioning Click! Click & All dimensions in mm The front plate cover can be opened at the lower part marked with an arrow. isoRW425_D00052_04_M_XXEN/03.2019...

  • Page 28: Wiring Diagram

    Installation, connection and commissioning 4.2 Wiring diagram L1/+ L2/- L1/+ COM465IP Test / Reset isoRW425 RS-485 For details about the conductor cross sections required for wiring, refer to the technical data on Page isoRW425_D00052_04_M_XXEN/03.2019...
  • Page 29 Installation, connection and commissioning Wiring diagram legend: Terminal Connections Connection to the supply voltage U via fuse (line protection): A1, A2 If supplied from an IT system, both lines have to be protected by a fuse.* Connect each terminal separately to PE: E, KE The same wire cross section as for "A1", "A2"...

  • Page 30: Commissioning

    Installation, connection and commissioning 4.3 Commissioning 1. Check that the ISOMETER® is properly connected to the system to be monitored. 2. Connect the supply voltage U to the ISOMETER® The device carries out a calibration, a self test and adjusts itself to the IT system to be monitored.

  • Page 31: Device Operation

    5. Device operation The menu structure is illustrated schematically on the following pages. After pressing the "MENU" button for > 1.5 s, the first menu item "AL" appears. (Enter) buttons for navigation and settings. Up and down button: - to navigate up or down the menu settings - increasing or decreasing values Pressing the MENU/Enter button for more than 1.5 s:...

  • Page 32: Display Elements

    Device operation 5.1 Display elements Device front/display Function green - on Assignment according to yellow - alarm table on Page 35 yellow - alarm AL1 AL2 Up button Test button ( press > 1.5 s) Down button Reset button (press > 1.5 s) ENTER MENU MENU button (press >...

  • Page 33: Menu Structure

    Device operation 5.2 Menu structure Measurement display Standard display Menu selection Menu Enter t > 5 min. Z [kΩ] Enter R [kΩ] C [μF] Parameter selection U L1 L2 [ V] UL1 [ V] UL2 [ V] . . . R [ %] U R [kΩ] Enter...

  • Page 34: Menu "Al

    Device operation 5.3 Menu "AL" 5.3.1 Response value setting Only after activating Z mode in the "SEt" menu, the response values "Z1" as well as "Z2" appear on the display and are activated. Simultaneously, the re- sponse values "R1" and "R2" are set to position off, but can then be set to on again.

  • Page 35: Menu "Out

    Device operation 5.4 Menu "out" 5.4.1 Configuration of the relay operating mode Relay K1 Relay K2 Description Display Display Operating mode of n.c. n.c. the relay n.c./n.o. FAC = Factory setting; Cs = User settings 5.4.2 Relay alarm assignment "r1" and "r2" and LED assignment In the alarm assignment, each alarm is assigned to the corresponding relay with the setting "on".

  • Page 36: Fault Memory Configuration

    Device operation Alarm K1 "r1" K2 "r2" LEDs description ON AL1 AL2 Display Display    Pre-alarm Z1 Z1 < Ω Z1 < Ω    Alarm Z2 < Ω Z2 < Ω Alarm    U < V U <...

  • Page 37: Interface Configuration

    Device operation 5.4.4 Interface configuration Display Setting value Description Range Adr = 0 deactivates BMS as well as Modbus and Bus- 0/3 … 90 activates isoData with con- Adr. tinuous data output (115k2, 8E1) “---“ : BMS bus (9k6, 7E1) Baud “---“...

  • Page 38: Menu "T

    Device operation 5.5 Menu "t" 5.5.1 Time configuration Display Setting value Description Alarm assignment s Start-up delay when starting the 0 … 10 device s Response delay K1 and K2 0 … 99 s Delay on release K1 and K2 toff 0 …...

  • Page 39: Menu "Set

    50.0 / and select associated 50.0 60.0 system frequency f Test the system connec- tion during device test S.Ct Device test during device start Restore factory settings For Bender Service only FAC = Factory setting; Cs = User settings isoRW425_D00052_04_M_XXEN/03.2019...

  • Page 40: Measuring Value Display And History Memory

    Device operation 5.7 Measuring value display and history memory In R mode only R and in Z mode only Z is permanently shown on the display (standard display). All other measuring value displays switch to the standard display after a maximum of 5 min. The fault location will only be stored in the history memory ("HiS") in R mode.
  • Page 41 Device operation Display Description Insulation impedance  kΩ 1 kΩ ... 1 MΩ Resolution 1 kΩ Insulation resistance  ± R kΩ 1 kΩ ... 4 MΩ Resolution 1 kΩ/10 kΩ System leakage capacitance  Z mode = off: 1 μF … 400 μF Resolution 1 μF μF Z mode = on: 1 nF …...

  • Page 42: Data Access Using The Bms Protocol

    6. Data access using the BMS protocol The BMS protocol is an essential component of the Bender measuring device interface (BMS bus protocol). ASCII characters are used for the data transfer. BMS channel Operation value Alarm Pre-alarm R1 Alarm R2...

  • Page 43: Data Access Using The Modbus Rtu Protocol

    7. Data access using the Modbus RTU protocol Requests to the ISOMETER® can be made using the function code 0x03 (read multiple registers) or the command 0x10 (write multiple registers). The ISOMETER® generates a function-related answer and sends it back. 7.1 Reading out the Modbus register from the ISOMETER®...

  • Page 44: Answer Of The Isometer® To The Master

    Data access using the Modbus RTU protocol 7.1.2 Answer of the ISOMETER® to the master Byte Name Example Byte 0 ISOMETER® Modbus address 0x03 Byte 1 Function code 0x03 Byte 2 Number of data bytes 0x02 Byte 3, 4 Data 0x0047 Byte 7, 8 CRC16 Checksum...

  • Page 45: Isometer® Answer To The Master

    Data access using the Modbus RTU protocol 7.2.2 ISOMETER® answer to the master Byte Name Example Byte 0 ISOMETER® Modbus address 0x03 Byte 1 Function code 0x10 Byte 2, 3 Start register 0x0BBB Byte 4, 5 Number of registers 0x0001 Byte 6, 7 CRC16 Checksum 0x722A...

  • Page 46: Modbus Register Assignment Of The Isometer

    8. Modbus register assignment of the ISOMETER® The information in the registers is: the measuring value without alarm; the measuring value with alarm 1; the measuring value with alarm 2; or only the device fault, depending on the device condition. Measuring value Register Device fault...
  • Page 47 Modbus register assignment of the ISOMETER® Measuring value Register Device fault Without Alarm 1 Alarm 2 alarm 1016 Voltage (76) [no alarm] 1019 1020 Voltage (76) [no alarm] 1023 Fault location 1024 in % --- (1022) 1027 [no alarm] 1028 Insulation fault (71) 1031...
  • Page 48 Modbus register assignment of the ISOMETER® Permissions Description Format Unit Value range Register Number of Mod- UINT 16 0…9 bus measured value channels with active alarm Activation of pre- UINT 16 [2]/[3] * alarm value 3000 impedance meas- urement "Z1" Pre-alarm value 3001 impedance...
  • Page 49 Modbus register assignment of the ISOMETER® Permissions Description Format Unit Value range Register Activation alarm value resist- 0/1/[2]/[3] * 3006 UINT 16 ance measurement "R2" Alarm value 3007 resistance UINT 16 kΩ 1 … R1 measurement "R2" Activation alarm value 0/1 * 3008 UINT 16...
  • Page 50 Modbus register assignment of the ISOMETER® Permissions Description Format Unit Value range Register 0 = BMS 1 = 1.2 k 2 = 2.4 k 3 = 4.8 k 3016 Baud rate "Adr 1" UINT 16 4 = 9.6 k 5 = 19.2 k 6 = 38.4 k 7 = 57.6 k 8 = 115.2 k...
  • Page 51 Modbus register assignment of the ISOMETER® Permissions Description Format Unit Value range Register Parameter "Z": 500 = 50.0 3023 System fre- UINT 16 quency f for Z 600 = 60.0 mode Test of the sys- tem connection 0/1 * 3024 UINT 16 during device test "nEt"...
  • Page 52 Modbus register assignment of the ISOMETER® Permissions Description Format Unit Value range Register UNIT 16 (ASCII) - 9800 Device name refer to to 9809 Chapter 8.1.1 Software Software ID 9820 UINT 16 ID number number Software version Software 9821 UINT 16 number version Software...

  • Page 53: Device-Specific Data Type Of The Isometer

    Modbus register assignment of the ISOMETER® 8.1 Device-specific data type of the ISOMETER® 8.1.1 Device name The data format of the device name is specified below. Word 0x01 0x02 0x03 ------------------- 0x08 0x09 0x00 10 Words in total Each Word contains two ASCII characters 8.1.2 Measuring values Each measuring value is available as a channel and consists of 8 bytes (4 reg-...

  • Page 54: Float = Floating Point Value Of The Channels

    Modbus register assignment of the ISOMETER® 8.1.2.1 Float = Floating point value of the channels 0x00 0x01 HiByte LoByte HiByte LoByte S E E E E E E E E M M M M M M M M M M M M M M M M M M M M M M M Presentation of the bit order for processing analogue measuring values ac- cording to IEEE 754 S = Sign...

  • Page 55: At&T = Alarm Type And Test Type (Internal/External)

    Modbus register assignment of the ISOMETER® 8.1.2.2 AT&T = Alarm type and test type (internal/external) Meaning No alarm Prewarning Device error Reserved Warning Alarm Reserved … … … Reserved Reserved No test Internal test External test The alarm type is coded by bits 0 to 2. Bits 3, 4 and 5 are reserved and always have the value 0.

  • Page 56: R&U = Range And Unit

    Modbus register assignment of the ISOMETER® 8.1.2.3 R&U = Range and unit Meaning Invalid (init) No unit Ω Baud °C °F Second Minute Hour Month Actual value The actual value is lower The actual value is higher Invalid value The units of bits 0 to 4 are coded. ...

  • Page 57: Alarm Assignment Of The Relays

    Modbus register assignment of the ISOMETER® 8.1.3 Alarm assignment of the relays Several alarms can be assigned to each relay. For the assignment of each relay, a 16-bit-register is used with the bits described below. The following table ap- plies to relay 1 and relay 2, in which "x" stands for the relay number. A set bit activates the specified function.

  • Page 58: Channel Descriptions

    Modbus register assignment of the ISOMETER® Display indication Meaning When reading, always 0 Reserved When writing, any value When reading, always 0 Reserved When writing, any value When reading, always 0 Reserved When writing, any value 8.2 Channel descriptions Measuring value description / Alarm Parameter Note...
  • Page 59 Modbus register assignment of the ISOMETER® To convert parameter data, data type descriptions are required. Text representation is not necessary in this case. Parameter Description of parameters 1023 (0x3FF) Parameter/measured value invalid. The menu item of this parameter is not displayed. 1022 (0x3FE) No measured value/no message 1021 (0x3FD) Measured value/parameter inactive 1020 (0x3FC) Measured value/parameter only temporarily inactive (e.g.

  • Page 60: Isodata Data String

    9. IsoData data string In IsoData mode, the ISOMETER® continuosly sends the whole data string with a cycle time of approximately 1 s. Communication with the ISOMETER® within this mode is not possible and no additional sender may be connected via the RS-485 bus cable.
  • Page 61 IsoData data string String Description Alarm message [hexadecimal] (without leading "0x") The alarms are included in this value with the OR function. Assignment of the alarms: 0x0002 Device fault 0x0004 Prewarning insulation resistance R at L1/+ 0x0008 Prewarning insulation resistance R at L2/- 0x000C Prewarning insulation resistance R symmetrical...

  • Page 62: Technical Data

    10. Technical data 10.1 Tabular presentation ( )* = factory setting Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Definitions: Measuring circuit (IC1) ...........................L1/+, L2/- Supply circuit (IC2) ............................A1, A2 Output circuit (IC3)........................... 11, 14, 24 Control circuit (IC4) ...........................E, KE, T/R, A, B Rated voltage.................................
  • Page 63 Technical data Frequency range U ............................47…63 Hz Power consumption ..........................≤ 3 W, ≤ 9 VA IT system being monitored Nominal system voltage U ................3(N)AC, AC 0…440V/DC 0…440 V Nominal system voltage range U (UL508)..................AC/DC 0…400 V Tolerance of U ..............................
  • Page 64 Technical data Time response Response time t of R = 0.5 x R and C =1 μF according to IEC 61557-8 ........... ≤ 10 s Response time t of Z = 0.5 x Z ........................≤ 5 s Start-up delay t ............................. 0…10 s (0 s)* Response delay t ..........................
  • Page 65 Technical data Switching elements Switching elements..................2 x 1 N/O contacts, common terminal 11 Operating principle ................N/C operation/N/O operation (N/O operation)* Electrical endurance, number of cycles ......................10,000 Contact data acc. to IEC 60947-5-1: Utilisation category.............. AC-12..AC-14 ..DC-12 ..DC-12 ..DC-12 Rated operational voltage .............230 V...230 V.....24 V..
  • Page 66 Technical data Multi-conductor flexible.........................0.2…1.5 mm Multi-conductor flexible with ferrules without plastic sleeve.............0.25…1.5 mm Multi-conductor flexible with TWIN ferrules with plastic sleeve............0.25…1.5 mm Push-wire terminal: Nominal current..............................≤ 10 A Conductor sizes .............................AWG 24-14 Stripping length ..............................10 mm Rigid.................................0.2…2.5 mm flexible without ferrules ........................0.75…2.5 mm flexible with ferrules with/without plastic sleeve ................0.25…2.5 mm Multi-conductor flexible with TWIN ferrules with plastic sleeve............0.5…1.5 mm Opening force................................

  • Page 67: Standards, Approvals And Certifications

    Technical data 10.2 Standards, approvals and certifications The ISOMETER® has been developed in compliance with the following standards: DIN EN 61557-8 (VDE 0413-8): 2015-12/Ber1: 2016-12   DIN EN 50155: 2014-12   IEC 61557-8: 2014/COR1: 2016   Subject to change! The specified standards take into account the edition valid until 03.2019 unless otherwise indicated.
  • Page 68 Technical data isoRW425_D00052_04_M_XXEN/03.2019...
  • Page 69 Technical data isoRW425_D00052_04_M_XXEN/03.2019...

  • Page 70: Index

    INDEX History memory 24 How to use this manual 6 Commissioning 30 Configuration Installation and connection 26 - Fault memory 36 Intended use 13 - Function 39 Interface/protocols - Interface 37 - BMS 24 - Relay operating mode 35 - IsoData 24 - Time 38 - Modbus RTU 24 Connection monitoring 20...
  • Page 71 Operating time 22 Operation 31 Ordering information 67 Password protection 23 Relay alarm assignment 35 Reset button T/R 23 Response delay 22 Response times 21 Response value setting 34 Safety instructions 12 Self test 18 - Automatic 19 - Manual 19 Signalling assignment of the alarm relays K1/K2 20 Start-up delay 23...
  • Page 72 Bender GmbH & Co. KG Londorfer Str. 65 • 35305 Gruenberg • Germany P.O. Box 1161 • 35301 Gruenberg • Germany Tel.: +49 6401 807-0 Fax: +49 6401 807-259 E-mail: info@bender.de Web: http://www.bender.de Group Photos: Bender archive.

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