Bender ISOMETER isoLR275 Manual
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Bender ISOMETER isoLR275 Manual

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Manual
ISOMETER® isoLR275
Coupling device AGH-LR
Insulation monitoring device for unearthed
IT AC, AC/DC and DC systems
for electrical installations with a low level of resistance
up to AC 793 V/DC 1100 V
Software version: D369 V2.1
isoLR275_D00127_01_M_XXEN/06.2020

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Summary of Contents for Bender ISOMETER isoLR275

  • Page 1 Manual ISOMETER® isoLR275 Coupling device AGH-LR Insulation monitoring device for unearthed IT AC, AC/DC and DC systems for electrical installations with a low level of resistance up to AC 793 V/DC 1100 V Software version: D369 V2.1 isoLR275_D00127_01_M_XXEN/06.2020...
  • Page 2 Bender GmbH & Co. KG Postbox 1161 • 35301 Grünberg • Germany Londorfer Str. 65 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: info@bender.de • www.bender.de © Bender GmbH & Co. KG All rights reserved.

  • Page 3: Table Of Contents

    Table of contents 1. Safety instructions ....................... 6 Intended use ........................6 1.1.1 Personnel ........................6 1.1.2 Hazards when handling the ISOMETER® isoLR275 ........6 1.1.3 Note ..........................6 Explanation of symbols and notes ................7 Directions for installation ..................... 7 2.
  • Page 4 Table of contents Menu ISO SETUP: Setting of the basic ISOMETER® functions ....................27 5.4.1 Response values Alarm1 and Alarm2 ............28 5.4.2 Operating principle of the alarm relays ............28 5.4.3 Memory setting (on/off) ..................29 5.4.4 Current output for external measuring instruments ....... 30 5.4.5 Adjusting the current output ................
  • Page 5 Table of contents 7. Technical data isoLR275 with AGH-LR ..............44 isoLR275 data in tabular form ................... 44 AGH-LR data in tabular form ..................47 Standards, approvals and certifications ..............48 Ordering information ....................48 Label for modified versions ..................48 Characteristic curves ....................

  • Page 6: Safety Instructions

    Monitoring the insulation resistance of IT systems Use which deviates from or is beyond the scope of these technical specifications is con- sidered non-compliant. The Bender companies shall not be liable for any losses or da- mage arising therefrom. Intended use also implies: •...

  • Page 7: Explanation Of Symbols And Notes

    Safety instructions 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 IT system. Children and unauthorised persons must not have access to or contact with the ISOME- TER®.
  • Page 8 Safety instructions The terminals and KE have to be connected by a separate wire to the protective conductor (PE). If the terminals L1, L2 of the device are connected to an IT system under operation, the terminals and KE must not be disconnected from the protective con- ductor (PE).
  • Page 9 Safety instructions isoLR275_D00127_01_M_XXDE/06.2020...

  • Page 10: Function

    • Memory with real-time clock to store alarm messages with date and time stamp • BMS interface (Bender Measuring Device Interface) for communication with other Ben- der devices (RS-485 galvanically isolated) • Internal disconnection of the ISOMETER® from the IT system to be monitored (via con- trol signal;...

  • Page 11: Description Of Function

    Function Only use the AGH-LR coupling device supplied with the device for adaptation of the no- minal voltage range. The devices isoLR275 and AGH-LR are ideally adapted to each other. The corresponding combination device required in each case can be identified via the serial number on the device label. For repair work, both devices should be sent in in order to guaran- tee measuring accuracy.

  • Page 12: Measurement Profiles

    Function PLUS *) AMP -measurement method (Adaptive Measuring Pulse), a measurement method developed by Bender (European Patent: EP 0 654 673 B1). 2.4.1 Measurement profiles The measuring circuit of the isoLR275 can be adjusted to different requirements in the ISO ADVANCED/MEASURE menu: = Suitable for pure AC systems = Suitable for converters with frequencies >...

  • Page 13: Current Output For External Measuring Instrument

    Device error x Internal device error Switch the supply voltage off and on Please contact Bender If, for functional reasons, the supply voltage cannot be switched on or off, a reset of the sequence control system can be carried out by pressing the buttons "ESC", "RESET"...

  • Page 14: Function Input F1/F2

    Function 2.4.6 Function input F1/F2 The ISOMETER® can be connected or disconnected from the IT system and set to STANDBY mode with the function input F1/F2. If the input F1/F2 is bridged, the connec- tions to the coupling device AK1/AK2 are switched off via internal coupling relays, the measuring function is stopped and the message "STANDBY"...

  • Page 15: Isonet Function (Com Setup)

    Function 2.4.7 ISOnet function (COM SETUP) To activate this function, select "ISOnet=ON“ in the COM SETUP menu. This function is a type of scanning function. The BMS master with activated ISOnet function controls the ISOnet slave devices via the BMS bus. When the master ISOMETER® has finished one measuring cycle, the authorisation for insulation monitoring is passed on to the next higher BMS address.

  • Page 16: Commissioning Flow Chart

    Commissioning of the ISOMETER® (1) Is the system to be monitored an isoLR is not suitable for this unearthed system (IT system)? application( contact Bender) Is the maximum nominal voltage isoLR is not suitable for this U n ≤ AC 793 V application( contact Bender) and is U n ≤...
  • Page 17 Commissioning flow chart Commissioning of the ISOMETER® (2) Connect the supply voltage U S The ISOMETER carries out a self test. The display indicates Connect the voltage U n of the the insulation value after finishing IT system to be monitored the measurement Set the clock Shall the basic setting...
  • Page 18 Commissioning flow chart Commissioning of the 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. Check the connecting leads ! Do both alarm LEDs light up? Is voltage Un applied to the Did the alarm relays switch ?
  • Page 19 Commissioning flow chart isoLR275_D00127_01_M_XXDE/06.2020...

  • Page 20: Installation And Connection

    Installation and connection 4. Installation and connection 4.1 Mounting of the isoLR275 Install the isoLR275 and the AGH-LR with a distance of at least 30 mm to all adjacent devices to ensure compliance with prescribed temperature limits. The cable lengths between AGH-LR and isoLR275 must not exceed 0.5 m.
  • Page 21 Installation and connection Connection and wiring diagram 3/N AC - system AGH-LR L1 L2 3 AC - system A1/+ A2/- isoLR275 L1 L2 AC - system T1 T2 R1 R2 F1 F2 M+ M- A B 11 12 14 21 22 24 DC - system Legend wiring diagram: *8 External "RESET"...

  • Page 22: Operation And Configuration

    Operation and configuration 5. Operation and configuration 5.1 Display and operating elements LR275 "INFO" button: to query standard information/ "ESC" button: back (menu function), to confirm parameter change "TEST" button: to call up the self test/ Arrow up button: parameter change, to move up in the menu "RESET"...

  • Page 23: Display In Standard Mode

    Operation and configuration 5.1.1 Display in standard mode I n s u l a t i o n F a u l t Ω R s = 0 1 1 k Indication of the insulation resistance in kΩ Additional information about the insulation resistance: „+“= Insulation fault at L+ „–“= Insulation fault at L–...

  • Page 24: Control Buttons

    Seite 52) • COM-Setup (own bus address) Please have the details above on hand if you have a problem and if you contact Bender for technical questions. Press the "TEST" button to start the self test of the ISOME- TER®.

  • Page 25: Menu Structure And Menu Mode

    Operation and configuration ENTER button: To select a menu item or sub menu item, confirm or store a parameter MENU change and to return to the associated sub menu item or skip to the next entry field. "ESC" button: To return from a sub menu to the previous menu. INFO If the menu is not exited, the device automatically returns to the stan- dard mode again after approximately five minutes.

  • Page 26: Changing From The Menu Mode To The Standard Mode

    Operation and configuration 5.2.3 Changing from the menu mode to the standard mode Pressing the "ESC" button allows fast changing from the menu mode to the standard mode. Thus, the menu item "EXIT" need not to be activated. If no button is pressed in a main or submenu, the system will automatically return from the menu mode to the standard mode after approximately five minutes.

  • Page 27: Menu History Info

    Operation and configuration 5.3 Menu HISTORY INFO 99 events with date and time stamp can be stored in the memory database. The data- base is designed as a ring memory, i.e. the eldest entry is overwritten. Data is written into a non-volatile memory and therefore is protected against voltage failure. Data record Event Display indication 1 Switch the supply voltage on...

  • Page 28: Diagram History Info

    Operation and configuration 5.3.1 Diagram HISTORY INFO *** IT-SYSTEM *** R >1.0 MW 1. EXIT 2. HISTORY INFO 3. ISO SETUP 4. ISO ADVANCED 5. COM SETUP 6. PASSWORD 7. LANGUAGE 8. SERVICE Nr.: 01 #Nr: 08 Power on Nr.: 01 #Nr: 08 Clear all: off Nr.: 01 #Nr: 08 Nr.: 02 #Nr: 08...

  • Page 29: Response Values Alarm1 And Alarm2

    Operation and configuration 5.4.1 Response values Alarm1 and Alarm2 The response values Alarm1 and Alarm2 are selected with the Up/Down button and stored with the Enter button. 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"...

  • Page 30: Memory Setting (On/Off)

    Operation and configuration ISO SETUP diagram *** IT-SYSTEM *** R >1.0 MW 1. EXIT 2. HISTORY INFO 3. ISO SETUP 4. ISO ADVANCED 5. COM SETUP 6. PASSWORD 7. LANGUAGE 8. SERVICE 1. Exit 2. Alarm1: 4 kW Alarm1 : 4 kW 3.

  • Page 31: Current Output For External Measuring Instruments

    Operation and configuration 5.4.4 Current output for external measuring instruments Factory setting: 0…20 mA The current output of the isoLR275 can be set to "0…20 mA" or "4…20 mA" via the "M+/M-:" menu item. The maximum load is 500 Ω. 5.4.5 Adjusting the current output Factory setting = 28 kΩ...

  • Page 32: Menu Iso Advanced - Extended Functions

    Operation and configuration 5.5 Menu ISO ADVANCED - Extended functions 5.5.1 External coupling device (AGH: LR) Use the isoLR275 only in conjunction with the AGH-LR coupling device. The menu set- ting AGH:PV is pre-defined. The current software version does not allow other settings.

  • Page 33: Repetition Time For The Automatic Self Test (Autotest: 24H)

    Operation and configuration Setting the parameter e max 150μF 500μF Response time t Response time t (acc. to IEC 61557-8) Profile Description = 1kΩ = 1kΩ = 1μF = 200μF DC measurement Standard mea-surement method using method permissible a DC measuring voltage for pure AC <...

  • Page 34: Start-Up Time For The Automatic Self Test (Test)

    Operation and configuration 5.5.7 Start-up time for the automatic self test (Test) When the 24 h self test is activated in the ISO ADVANCED menu, it is possible to set the time (hour) for carrying out the self test by means of the "TEST: 12:00" menu item. Then the self test is automatically carried out once a day at a given time.

  • Page 35: Menu Com Setup - Bms Interf Ace

    Operation and configuration 5.6 Menu COM SETUP - BMS interf ace 5.6.1 Bus address "Addr:" This menu is used to set the BMS bus address for isoLR275. Take care that the bus add- ress is not assigned twice. The device is factory set to address 3 and hence operates as a slave. If several isoLR275s are operated on one BMS bus, the address of other ISOMETER®s must be assigned one after the other, since only one device may have the master function.

  • Page 36: Diagram Com Setup

    Operation and configuration 5.6.4 Diagram COM SETUP *** IT-SYSTEM *** R >1.0 MW 1. EXIT 2. HISTORY INFO 3. ISO SETUP 4. ISO ADVANCED 5. COM SETUP 6. PASSWORD 7. LANGUAGE 8. SERVICE 1. Exit 2. Addr: 003 Addr : 003 3.

  • Page 37: Password Menu

    Operation and configuration 5.7 PASSWORD menu 5.7.1 Setting and activating the password This menu can be used to activate a "Password" query. This protects the ISOMETER® against unauthorised settings and modifications. Set the desired password using the Up/Down buttons (menu item "2. Password: xxx") password: and confirm the setting with the Enter button.

  • Page 38: Language Menu

    2. Text: English 5.9 SERVICE menu This menu item is intended for the Bender service personnel and protected by a pass- word against erroneous settings. It is intended for fast fault clearance by qualified ex- perts in the event of a device error.
  • Page 39 Operation and configuration isoLR275_D00127_01_M_XXDE/06.2020...

  • Page 40: Serial Interface

    Serial interface 6. Serial interface 6.1 RS-485 interface with BMS protocol The RS-485 interface electrically isolated from the device electronics and the current output serves as a physical transmission medium for the BMS protocol. If several isoLR275 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...

  • Page 41: Topology Rs-485 Network

    The number of bus nodes is restricted to 32 devices. When more devices are to be con- nected, Bender recommends to use a DI1 repeater. 6.3 BMS protocol This protocol is an essential part of the Bender measuring device interface (BMS bus protocol). Data transmission generally makes use of ASCII characters.

  • Page 42: Bms Master

    Serial interface Interface data are: • Baud rate: 9600 baud • Transmission: 1 start bit, 7 data bits, 1 parity bit, 1 stop bit (1, 7, E, 1) • Parity: even • Checksum: Sum of all transmitted bytes = 0 (without CR and LF) The BMS bus protocol works according to the Master-Slave principle.

  • Page 43: Bms Slave

    Serial interface 6.3.2 BMS slave All isoLR275 devices 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.

  • Page 44: Commissioning Of An Rs-485 Network With Bms Protocol

    Serial interface 6.3.3 Commissioning of an RS-485 network with BMS protocol • Connect the terminals A and B of all bus devices in one line • Switch the terminating resistors on at the start and the end of the RS-485 network. If a device at the end of the bus is not terminated, connect a 120 Ω...
  • Page 45 Serial interface isoLR275_D00127_01_M_XXDE/06.2020...

  • Page 46: Technical Data Isolr275 With Agh-Lr

    Technical data isoLR275 with AGH-LR 7. Technical data isoLR275 with AGH-LR 7.1 isoLR275 data in tabular form The values marked with** are absolute values. ()* = factory setting Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Rated voltage for isoLR275-3 ............................AC 250 V Rated impulse voltage/pollution degree.........................
  • Page 47 Technical data isoLR275 with AGH-LR Response values Response value R ............................. 0.2…100 kΩ Factory setting R (Alarm1) .............................. 4 kΩ Response value R .............................. 0.2…100 kΩ Factory setting R (Alarm2) .............................. 1 kΩ Relative uncertainty (7 kΩ…100 kΩ) (nach IEC 61557-8)................... ±15 % Relative uncertainty (0.2 kΩ…7 kΩ)..........................
  • Page 48 Technical data isoLR275 with AGH-LR Contact data acc. to IEC 60947-5-1: Utilisation category ........AC 13..AC 14..DC-12 ..DC-12..DC-12 Rated operational voltage ......230 V..230 V..24 V ..110 V..220 V Rated operational current ......5 A..3 A..1 A ..0,2 A..0,1 A Minimum contact rating..........................1 mA at AC/DC ≥...

  • Page 49: Agh-Lr Data In Tabular Form

    Technical data isoLR275 with AGH-LR 7.2 AGH-LR data in tabular form Insulation coordination acc. to IEC 60664-1 Rated insulation voltage..............................AC 800 V Rated impulse voltage/pollution degree.......................... 8 kV/3 Voltage ranges Nominal system voltage U ..................AC, 3(N)AC 0…793 V, DC 0…1,100 V Nominal frequency f ............................

  • Page 50: Standards, Approvals And Certifications

    Technical data isoLR275 with AGH-LR 7.3 Standards, approvals and certifications The ISOMETER® was designed in compliance with the following standards: - DIN EN 61557-8 (VDE 0413-8) - IEC 61557-8 - IEC 61326-2-4 - DIN EN 60664-1 (VDE 0110-1) - DIN EN 60664-3 (VDE 0110-3) Subject to change! The specified standards take into account the edition valid until 07.2018 unless otherwise indicated.

  • Page 51: Characteristic Curves

    Technical data isoLR275 with AGH-LR 7.6 Characteristic curves Current output 0…20 mA [k:] 1000,00 20 mA x R Rsk=28kOhm Rsk=120kOhm = Insulation fault in kΩ 100,00 = Centre scale in kΩ I = Current output in mA 10,00 1,00 10,0 15,0 20,0 25,0...
  • Page 52 Technical data isoLR275 with AGH-LR Status number Value of the respective number Position numbers from the left K1: N/O operation Test K1: N/C operation Test K1: flashing function K1: N/O operation K1: N/C operation K2: N/O operation Test K2: N/C operation Test K2: flashing function K2: N/O operation K2: N/C operation...
  • Page 53 Technical data isoLR275 with AGH-LR Dimension diagram enclosure isoLR275 All dimensions in mm • DIN rail mounting according to DIN EN 60715/IEC 60715 • Screw mounting by means of a plug-in trapezoidal support Order-No.: B990056 Dimension diagram enclosure AGH-LR Illustrations with terminal covers / All dimensions in mm isoLR275_D00127_01_M_XXDE/06.2020...

  • Page 54: Index

    Assigning bus address for isoLR275 Measurement profile 31 Automatic self test, setting 32 Menu - COM SETUP 34 - ISO SETUP 27 Bender measuring device interface - PASSWORD 36 (BMS) 40 - SERVICE 37 BMS addresses 42 BMS master 40...
  • Page 56 Bender GmbH & Co. KG Postbox 1161 • 35301 Grünberg • Germany Londorfer Str. 65 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: info@bender.de • www.bender.de © Bender GmbH & Co. KG All rights reserved.

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