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Bender ISOMETER isoLR275, Manual

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Bender ISOMETER isoLR275 Manual Download Page 11

11

isoLR275_D00127_00_M_XXEN/07.2018

2.  Function

2.1

Device features isoLR275

 

ISOMETER® for IT AC systems with galvanically connected rectifiers or 
converters 

 

and for IT DC systems (IT = unearthed systems)

 

Particularly suited for monitoring electrical installations with a low level 
of resistance

 

isoLR275 is always operated in conjunction with AGH-LR

 

Automatic adaptation to the existing system leakage capacitance

 

-Measurement method (European Patent: EP 0 654 673 B1)

 

Choice of measurement methods to meet different requirements

 

Two separately adjustable response ranges of 0.2 kΩ…100 kΩ each 
(Alarm 1, Alarm 2)

 

Two-line LC display

 

Automatic device self test

 

Memory with real-time clock to store alarm messages with date and 
time stamp

 

BMS interface (Bender Measuring Device Interface) for communication 
with other Bender devices (RS-485 galvanically isolated)

 

Internal disconnection of the ISOMETER® from the IT system to be 
monitored (via control signal; terminals F1/F2), e.g. if several 
ISOMETER®s are interconnected

 

Current output 0(4)…20 mA (electrically isolated) in relation to the 
insulation value measured in the system

AMP

Plus

Summary of Contents for ISOMETER isoLR275

Page 1: ...ling 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_00_M_XXEN 07 2018 ...

Page 2: ... 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 Photos Bender archive and bendersystembau archive ...

Page 3: ... Device features AGH LR 12 2 3 Product description 12 2 4 Description of function 13 2 4 1 Measurement profiles 14 2 4 2 Self test 15 2 4 3 Current output for external measuring instrument 16 2 4 4 Real time clock 17 2 4 5 Coupled IT systems 17 2 4 6 Function input F1 F2 for connection or disconnection of IT systems being monitored 18 2 4 7 ISOnet function COM SETUP 20 3 Commissioning flow chart i...

Page 4: ...ating principle of the alarm relays 39 5 4 3 Memory setting on off 42 5 4 4 Current output for external measuring instruments 42 5 4 5 Adjusting the current output to the centre scale mark of external measuring instruments 42 5 5 Menu ISO ADVANCED Setting of the extended functions 44 5 5 1 External coupling device AGH LR 44 5 5 2 Adaptation of the system leakage capacitance Cemax 150 µF 44 5 5 3 C...

Page 5: ...e 56 6 1 RS 485 interface with BMS protocol 56 6 2 Topology RS 485 network 57 6 2 1 Correct arrangement 57 6 2 2 Wrong arrangement 57 6 2 3 Wiring 57 6 3 BMS protocol 58 6 3 1 BMS master 59 6 3 2 BMS slave 60 6 3 3 Commissioning of an RS 485 network with BMS protocol 61 7 Technical data isoLR275 with AGH LR 63 7 1 isoLR275 data in tabular form 63 7 2 AGH LR data in tabular form 67 7 3 Standards ap...

Page 6: ...of the pro duct and with training appropriate to the work Personnel must have read and understood the safety section and warning information in this operating manual 1 1 2 Hazards when handling the ISOMETER isoLR275 The ISOMETER is constructed according to the state of the art and the recog nised technical safety rules Nevertheless when it is being used hazards may occur to the life and limb of th...

Page 7: ... 3 Note Make sure that the operating voltage is correct Prior to insulation and voltage tests the ISOMETER must be disconnected from the power system for the duration of the test 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 ha...

Page 8: ...ls is explained below This signal word indicates that there is a high risk of danger that will result in electrocution or serious injury if not avoided This signal word indicates a medium risk of danger that can lead to death or serious injury if not avoided This signal word indicates a low level risk that can result in minor or moderate injury or damage to property if not avoided This symbol deno...

Page 9: ... insulation fault e g via a suitable resis tance before starting the ISOMETER Risk of property damage due to unprofessional installation If more than one insulation monitoring device is connected to aconductively connected system the system can be da maged Ifseveraldevicesareconnected thedevicedoesnot function and does not signal insulation faults Make sure that only one insulation monitoring devi...

Page 10: ...it is useful to know the present value of the insulation resistance of the electrical installation ISO SETUP Alarm 1 Alarm 2 response values 4 kΩ 1 kΩ ISO SETUP Operating mode K1 K2 N O operation N O ISO SETUP Memory off ISO ADVANCED System leakage capacitance Measurement method 150 µF AMP COM SETUP Bus address 3 Slave When the AC system being monitored contains galvanically coupled DC circuits An...

Page 11: ...3 B1 Choice of measurement methods to meet different requirements Two separately adjustable response ranges of 0 2 kΩ 100 kΩ each Alarm 1 Alarm 2 Two line LC display Automatic device self test Memory with real time clock to store alarm messages with date and time stamp BMS interface Bender Measuring Device Interface for communication with other Bender devices RS 485 galvanically isolated Internal ...

Page 12: ... systems may include extensive DC sup plied loads such as converters or thyristor controlled DC drives The adapta tion to the existing system leakage capacitances takes place automatically Only use the AGH LR coupling device supplied with the device for adaptation of the nominal voltage range isoLR275 can share the BMS bus with other bus devices The devices isoLR275 and AGH LR are ideally adapted ...

Page 13: ...y or the external kW measuring instrument after the measu ring time has expired The measuring time is dependent on the selected measurement method the system leakage capacitance the insulation resistance and the system related disturbances System leakage capacitances do not influence the measuring accuracy If the reading is below the selected response values Alarm 1 Alarm 2 the as sociated alarm r...

Page 14: ...in the ISO ADVANCED MEASURE menu DC Suitable for pure AC systems AMP Suitable for converters with frequencies 10 Hz AMP2 Suitable for converters with frequencies 10 Hz AMP3 Suitable for converters with frequencies 1 Hz AMP4 Suitable for installations with strongly varying DC components Also refer to the table of measurement profiles starting from page 44 ...

Page 15: ...device re turns to the normal measuring mode and the currently measured value willbe displayed once the measuring time has elapsed When a device or connection fault is found the message Error appears on the display the device error LED lights the relay K2 21 22 24 switches and the corresponding fault message see table will be indicated If such a device error occurs another self test is started aft...

Page 16: ...lated to an external measuring instrument Alarm message Description Actions Connection PE No low resistance connection bet ween the terminals and KE to earth PE 1 Check the wiring of the terminals and KE to earth PE 2 Press the TEST button 3 Switch the supply voltage on and off Deviceerror x Internal device error 1 Press the TEST button 2 Switch the supply voltage off and on 3 Please contact Bende...

Page 17: ...ing out the self test by means of the TEST 12 00 menu Then a self test will be started automatically once a day exactly at the preset time If the 1 h test has been selected the self test is au tomatically carried out every full hour 2 4 5 Coupled IT systems When using ISOMETER s in IT systems make sure that only one active ISOMETER is connected in each interconnected system If IT systems are in te...

Page 18: ...estored and a completely new insulation resistance measurement cycle is started This function can be used to disconnect an isoLR275 selectively in IT systems via the auxiliary contacts of the respective coupling switch One coupling switch each in a line type or ring type arrangement can deactivate a subse quent isoLR275 to ensure that only one ISOMETER is active in each galvani cally connected IT ...

Page 19: ...Function 19 isoLR275_D00127_00_M_XXEN 07 2018 isoLR275 AGH LR isoLR275 AGH LR isoLR275 AGH LR isoLR275 AGH LR BMS bus s s s s Addr Addr Addr Addr RS 485 ...

Page 20: ...TER s are in the STANDBY mode In this way it is prevented that ISOMETER s influence each other in interconnected IT systems In comparison to a solution with coupling switches and function in put F1 F2 the response time will be extended because the measurement is not permanently carried out This has the advantage that no auxiliary contacts of a coupling switch are required Furthermore this solution...

Page 21: ...Function 21 isoLR275_D00127_00_M_XXEN 07 2018 isoLR275 AGH LR isoLR275 AGH LR isoLR275 AGH LR isoLR275 AGH LR BMS bus RS 485 Addr Addr Addr Addr IT system 1 IT system 2 IT system 3 IT system 4 ...

Page 22: ...22 isoLR275_D00127_00_M_XXEN 07 2018 3 Commissioning flow chart in three parts Due to limitations of space the three part flow chart begins on the next page ...

Page 23: ... voltage Us to the terminals A1 and A2 Consider the details indicated on the nameplate External TEST button NO contact to the terminals T1 and T2 External RESET button NC contact to the terminals R1 and R2 The output contacts of the alarm relays System fault 21 22 24 Alarm 1 11 12 14 Alarm 2 21 22 24 When using the RS485 interface take care that a 120 Ω resistor is connected at the beginning and t...

Page 24: ...he measurement Shall the basic setting be changed Alarm1 4 kΩ Alarm2 1 kΩ K1 K2 N O operation Memory off no yes Does one of the alarm LEDs light up Select ISO SETUP see chapter operation and setting no yes 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 Set the clock Connect the voltag...

Page 25: ...the preset response value Alarm 2 Check the connecting leads Is voltage Un applied to the terminals L1 L2 of the coupling device AGH LR Check the voltages with a suitable voltmeter yes yes Remove the resistor isoLR is correctly connected and functions reliably Do both alarm LEDs light up Did the alarm relays switch yes no Do both alarm LEDs light Did the alarm relays switch Alarm LEDs extinguished...

Page 26: ...of a protective device a 6 A fuse is recommen ded For UL and CSA applications the use of 5 A fuses is mandatory Devices for protection against short circuit in conformity with IEC 60364 4 43 for the coupling of terminals L1 L2 of the AGH LR the IT system being monito red 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 circu...

Page 27: ...button or an external reset button may only be connected to one ISOMETER A parallel connection of several test and reset inputs for collective ISOMETER testing is not allowed For UL applications Use 60 C 75 C copper conductors only Tightening torque isoPV 0 6 Nm 0 8 Nm AGH PV 0 5 Nm ...

Page 28: ...07 2018 PE L1 L2 AK1 AK2 L1 L2 L3 Un 3 AC system L1 N L2 Un L1 L2 L3 3 N AC system L1 L2 L1 L2 AC system L2 L1 Un L L DC system L2 L1 Un A1 A2 AK1 AK2 KE T1 T2 R1 R2 F1 F2 M M A B 11 12 14 21 22 24 isoLR275 mA 120 K1 K2 1 6 7 8 9 10 11 12 13 Us 2 3 4 5 AGH LR ...

Page 29: ...conductor L 6 Separate connection of and KE to PE 7 External TEST button N O contact 8 External RESET button N C 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 the insulation resistance is not measured Disconnection from the IT system 10 Current output electrically isolated 0 20 mA or...

Page 30: ... to call up the self test Arrow up button parameter change to move up in the menu 3 RESET button to delete stored insulation fault alarms Down button parameter change to move down in the menu 4 MENU button to call up the menu system Enter button Confirms parameter changes 5 Alarm LED 1 lights insulation fault first warning level reached 6 Alarm LED 2 lights insulation fault second warning level re...

Page 31: ...al information about the insulation resistance Insulation fault at L Insulation fault at L s New measurement is running 3 Polarity of the measuring pulse Valid BMS bus communication H New entry in the memory data base C Flashing clock is to be set 4 Messages Insulation fault Connection PE Device error x STAND BY 1 2 3 4 I n su l ation Fault R s 0 11kΩ H ...

Page 32: ... opening the menu Device name firmware version Response values Alarm1 and Alarm2 Leakage capacitance Ce indication in case of insula tion values 20 kΩ measurement not possible when using AMP3 and AMP4 Setup status for details about the setup status refer to the status table on page 71 COM Setup own bus address Please have the details above on hand if you have a problem and if you con tact Bender f...

Page 33: ... can onlybe reset when the measured insulation value is at least 25 or the value is 1 kΩ higher than the set response value Press the MENU button to call up the menu system For menu control use the arrow buttons the Enter button and the ESC but ton Up button To move up in the menu to increase the parameter value Down button To move down in the menu to decrease the parameter value ENTER button To s...

Page 34: ...b menus 5 2 1 Navigation within the menu Use the Up and Down buttons to select the appropriate menu item A flashing cursor indicates which submenu is selected Press the Enter button to call up the submenu of the associated menu In the submenus the appropriate parameters are also selected by means of the Up and Down buttons Press the Enter button to move the cursor to the edit field The Arrow up sy...

Page 35: ...ub menu flashing cursor in column 1 All measuring and alarm functions continue to run in the background during these menu operations 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 re ...

Page 36: ...Measure AMP 5 Autotest 24h 6 Clock 19 08 7 Date 01 01 01 8 Test 00 00 1 Exit 2 Alarm1 4 0 kΩ 3 Alarm2 1 0 kΩ 4 K1 N O 5 K2 N O 6 Memory on 7 M M 0 20 mA 8 M M Ri 28kΩ Nr 01 Nr 02 Power on 1 Exit 2 Addr 003 3 ISONet off 4 ISO Monitor Insert Service Password XXX ISO ADVANCED ISO SETUP HISTORY INFO COM SETUP SERVICE 1 Exit 2 Password XXX 3 Status off PASSWORD 1 Exit 2 Text Deutsch LANGUAGE ESC IT SYSTE...

Page 37: ...y is identified by an H To delete the H you have to open the HISTORY INFO menu item first To store the events with the actual date and time stamp you need to set the real time clock in the ISO ADVANCED menu first refer to Diagram ISO ADVANCED auf Seite 48 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...

Page 38: ...TORY 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 28 08 01 17 43 Nr 02 Nr 08 Clear all off 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 ESC IT SYSTEM R 1 0 MW H ...

Page 39: ...rating 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 the operating principle of the alarm relays does not have to be changed during a manual self test for any reason N C or N O has to be selected K1 N C Test N C operation contacts 11 12 14 with relay test ...

Page 40: ...relay test the alarm relay is deenergised during normal operation K2 N C N C operation contacts 21 22 24 without relay test the alarm relay is energised during normal operation K2 N O N O operation contacts 21 22 24 without relay test the alarm relay is deenergised during normal operation K2 Flash Flashing function contacts 21 22 24 the alarm relay switches and the LED flashes in the event of an a...

Page 41: ...UP 6 PASSWORD 7 LANGUAGE 8 SERVICE 1 Exit 2 Alarm1 4 kW 3 Alarm2 1 kW 4 K1 N O 5 K2 N O 6 Memory off 7 M M 0 20 mA 8 M M Ri 28 kW Alarm1 4 kW Alarm2 1 kW K1 N O K2 N O Memory off M M 0 20 mA K1 N O Test K1 N C Test K1 Flash K1 N O K1 N C Memory on Memory off M M 0 20 mA M M 4 20 mA IT SYSTEM R 1 0 MW H M M Ri 28 kW M M Ri 28 kW M M Ri 120 kW ...

Page 42: ...soLR275 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 to the centre scale mark of ex ternal measuring instruments Factory setting 28 kΩ Use the menu item 8 M M Ri in the ISO SETUP menu to select a centre scale mark 8 M M Ri 28kΩ centre scale RSk 28 kΩ factory setting 8 M M Ri 120kΩ centre scale RSk 120kΩ compatible to IRDH275 4 ...

Page 43: ...c curves on page 69 For UL applications The analogue output as such is not a safe alarm indication in compliance with UL1998 If the analogue output is intended to be used as a safe alarm the relay output at least K1 or K2 must additionally be used to provide redundancy OR both the relay outputs and the analogue output must be evaluated during the cyclic self test in order to ensure the proper func...

Page 44: ...nges at low frequency as a consequence of operation the response time tan depends on the lowest frequencies occurring between system and earth during operation This is typical of converter systems including low frequency control processes and direct current motors with low frequency control processes In order to improve the quality of insulation measurements in the different applications and to av...

Page 45: ...e tan acc to IEC 61557 8 Ran 1kΩ Ce 1μF Response time tan Ran 1kΩ Ce 200μF DC Standard mea surementmethod using a DC measuring vol tage for pure AC systems 3s DC measurement method permissible for Ce 10µF only AMP Standard measu rement method using the pulse measurement method for AC DC systems at system fre quencies 10 Hz factory setting 16s 40s ...

Page 46: ...lse measurement method for AC DC systems at system frequen cies 10 Hz 30s 50s AMP3 Optimised measu rement method for AC DC sys tems at system frequencies 1Hz 140s 140s AMP4 Optimised measu rement method for installations comprising strongly varying DC components 370s 400s Setting the parameter Ce max 150μF 500μF ...

Page 47: ...he display and the clock has to be set again 5 5 6 Setting the date Date Not only is the time of day required but also the date has to be set for the his tory memory In the event of supply voltage failure the date function is not in fluenced for at least 30 days When switching the device on at a later date a new setting of the real time clock and the date is required 5 5 7 Specifying the start up ...

Page 48: ... SETUP 4 ISO ADVANCED 5 COM SETUP 6 PASSWORD 7 LANGUAGE 8 SERVICE 1 Exit 2 AGH PV 3 Ce max 150μF 4 Measure AMP 5 Autotest 24h 6 Clock 21 09 7 Date 01 01 01 8 Test 12 00 Ce max 150μF Autotest 24h 150μF 500μF 24h no 01h Clock 21 09 Date 01 01 01 Test 00 00 00 00 23 00 Measure AMP DC AMP AMP2 AMP3 AMP4 IT SYSTEM R 1 0 MΩ H ...

Page 49: ...nu under ISOnet ON The ISOnet function of all ISOMETER s existing in the system must be set to ON The BMS master with activated ISOnet function controls the ISOnet sla ve 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 slave device During the insulation monitoring process all other ISOMETER s are...

Page 50: ...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 button the indication changes to the standard indication of the isoLR275 after about five minutes If there is no information available from the selected ISOMETER the message NO DATA will be displayed Informatio...

Page 51: ...6 4 Diagram COM SETUP 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 3 ISONet off 4 ISO Monitor Addr 003 ISONet off NO DATA R ADR 01 ISONet off ISONet on ADR 01 ADR 30 ADR 001 ADR 030 IT SYSTEM R 1 0 MW H ...

Page 52: ... 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 Pass word xxx password and confirm the setting with the Enter button Activate the password in the 3 Status on menu by clicking the Enter button The factory setting is 3 Status off ...

Page 53: ... 5 7 2 PASSWORD diagram 1 EXIT 2 HISTORY INFO 3 ISO SETUP 4 ISO ADVANCED 5 COM SETUP 6 PASSWORD 7 LANGUAGE 8 SERVICE 1 Exit 2 Password XXX 3 Status off Status off Password XXX Status off Status on Password XXX Password 000 Password Password 999 IT SYSTEM R 1 0 MW H ...

Page 54: ..._M_XXEN 07 2018 5 8 LANGUAGE Menu 5 8 1 Language setting The menu item Language allows fault messages of the ISOMETER to be set to different languages There is a choice of German and English The device menu is not influenced by the language selection ...

Page 55: ...r service personnel and protected by a password against erroneous settings It is intended for fast fault clearance by qualified experts in the event of a device error 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 2 Text Deutsch 2 Text Deutsch 2 Text English IT SYSTEM R 1 0 MW H ...

Page 56: ... the BMS bus the BMS bus must be terminated at both ends with a 120 Ω resistor An RS 485 network that is not terminated is likely to get instable and may re sult in malfunctions Only the first and the last device in one line may be ter minated 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 t...

Page 57: ...continuous path without branches 6 2 1 Correct arrangement Three examples for correct arrangement 6 2 2 Wrong arrangement Three examples for wrong arrangement 6 2 3 Wiring The suitable type of wiring for the RS 485 network is shielded cable core diameter 0 6 mm e g J Y St Y 2x0 6 shield connected to earth PE on one end Connection to the terminals A and B The number of bus nodes is restricted to 32...

Page 58: ...hecksum 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 devices are slaves It is important that only one master is present in each network All bus devices are identified by a unique address The master scans all other devices on the bus cyclically listens to their...

Page 59: ...d for alarm and operational messages via the BMS bus If the master receives no answer from five subsequent addresses the scanning cycle is started again If the master recognises incorrect answers from a slave the fault message Fault RS485 will appear on the display Fault causes may be Addresses are assigned twice A second master exists on the BMS bus Interference signals occur on the bus lines A d...

Page 60: ...or isoLR275 a BMS address can be se lected from the address range 1 30 When assigning the addresses also other devices such as EDS4xx must be considered The receipt of the BMS data is indicated by a flashing point on the display on the right of the measuring pulse indication Flashing point BMS data re ceived If no flashing point appears it may be attributed to the following No master available in ...

Page 61: ...0 Ω resistor to the terminals A and B Switch the supply voltage on Determine one isoLR275 as the master and assign address 1 Assign the addresses 2 30 subsequently to all other isoLR275 and other bus devices see table below Check whether a flashing point appears on all devices BMS commands are being received The sub menu ISO Monitor in the COM SETUP menu allows insulation values of the ISOMETER s ...

Page 62: ... 30 IRDH275B 375B 575 isoPV isoLR275 Insulation monitoring devices 1 30 FTC4 Protocol converters 1 90 COM460IP Protocol converters 1 90 EDS46 49 Insulation fault locators EDS 1 150 MK800 Alarm indicator and test combination 111 119 PGH47 Locating current injector 121 150 PGH47 E Locating current injector Assign the addresses consecutively there must be no gaps greater than five in the respective r...

Page 63: ... M A B Voltage test acc to IEC 61010 1 3 536 kV Rated insulation voltage AC 250 V Rated impulse voltage pollution degree 4 kV III Basic insulation between 11 12 14 21 22 24 Voltage test acc to IEC 61010 1 2 21 kV Voltage ranges Nominal system voltageUn via AGH LR isoLR275 335 Supply voltage Us also see nameplate AC 88 264 V Frequency range Us 42 460 Hz Power consumption 21 5 VA Supply voltage Us a...

Page 64: ...Ω Factory setting Ran1 Alarm1 4 kΩ Response valueRan2 0 2 100 kΩ Factory setting Ran2 Alarm2 1 kΩ Relative uncertainty 7 kΩ 100 kΩ nach IEC 61557 8 15 Relative uncertainty 0 2 kΩ 7 kΩ 1 kΩ Response timetan see table starting from page 44 Hysteresis 25 1 kΩ Measuring circuit Measuring voltage Um peak value 50 V Measuring current Im atRF 0 Ω 1 5 mA Internal DC resistanceRi 35 kΩ Impedance Zi at 50 H...

Page 65: ...ver contacts K1 Alarm 1 K2 Alarm 2 device error Operating mode K1 K2 Alarm 1 Alarm 2 N C operation n c N O operation n o N O operation n o 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 10 V Environment EMC EMC not suita...

Page 66: ...rule without with plastic sleeve 0 25 2 5 mm2 Tightening torque 0 5 Nm Conductor sizes AWG 24 12 Cable length between isoLR275 and AGH LR 0 5 m Other Operating mode continuous operation Mounting display oriented Distance to adjacent devices 30 mm Degree of protection internal components DIN EN 60529 IP30 Degree of protection terminals DIN EN 60529 IP20 Type of enclosure X112 free from halogen DIN ...

Page 67: ...of ice Transport IEC 60721 3 2 2K3 withcondensation and formation of ice Long term storage IEC 60721 3 1 1K4 with condensation and formation of ice Classification of mechanicalconditions acc to IEC 60721 Stationary use IEC 60721 3 3 3M7 Transport IEC 60721 3 2 2M2 Long term storage IEC 60721 3 1 1M3 Connection Connection screw type terminals Connection rigid flexible 0 2 4 mm2 0 2 2 5 mm2 Connecti...

Page 68: ...4 Flammability class UL94 V 0 Weight 230 g 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 69: ...0127_00_M_XXEN 07 2018 7 4 Characteristic curves Current output 0 20 mA RF Insulation fault in kΩ RSk Centre scale in kΩ I Current output in mA 1 00 10 00 100 00 1000 00 0 0 5 0 10 0 15 0 20 0 25 0 I mA RF k Rsk 28kOhm Rsk 120kOhm RF 20 mA x RSk I RSk ...

Page 70: ...isoLR275_D00127_00_M_XXEN 07 2018 Current output 4 20 mA RF Insulation fault in kΩ RSk Centre scale in kΩ I Current output in mA 1 00 10 00 100 00 1000 00 0 0 5 0 10 0 15 0 20 0 25 0 I mA RF k Rsk 28kOhm Rsk 120kOhm RF 16 mA x RSk RSk I 4 mA ...

Page 71: ...erman Language English 8 Password protection not activated Password protection activated 9 DC measuring principle AMP measuring principle AMP2 measuring principle AMP3 measuring principle AMP4 measuring principle 10 max filter frequency 0 1Hz max filter frequency 1Hz max filter frequency 10Hz max filter frequency 50Hz 11 min filter frequency 0 1Hz min filter frequency 1Hz min filter frequency 10Hz...

Page 72: ...GH LR 72 isoLR275_D00127_00_M_XXEN 07 2018 Dimension diagram enclosure isoLR275 All dimensions in mm DIN rail mounting according to DIN EN 60715 IEC 60715 or Screw mounting by means of a plug in trapezoidal support Order No B990056 ...

Page 73: ...Technical data isoLR275 with AGH LR 73 isoLR275_D00127_00_M_XXEN 07 2018 Dimension diagram enclosure AGH LR All dimensions in mm Illustration with terminal covers ...

Page 74: ... screw fixing Order No B990056 Type Nominalvoltage Un Supply voltage Us Art No isoLR275 327 AGH LR 3 consisting of isoLR275 327 AGH LR 3 N AC 0 793 V DC 0 1100 V AC 19 2 55 V 42 460 Hz DC 19 2 72 V B 9106 5702W B 9106 5700W B 9803 9022W isoLR275 335 AGH LR consisting of isoLR275 335 AGH LR 3 3 N AC 0 793 V DC 0 1 100 V AC 88 264 V DC 77 286 V B 9106 5703W B 9106 5701W B 9803 9022W ...

Page 75: ...Technical data isoLR275 with AGH LR 75 isoLR275_D00127_00_M_XXEN 07 2018 7 6 Label for modified versions There will only be a label in this field if the ISOMETER is different from the standard version ...

Page 76: ...teristic curves 69 Commissioning BMS network 61 Commissioning flow chart 22 Coupled IT systems 17 Current output 0 4 20 mA 70 D Description of function 13 Directions for installation 9 Display menu mode 32 standard mode 31 Display and operating elements isoLR275 30 E Explanation of symbols and notes 8 External coupling devices 44 External RESET button 29 External TEST button 29 F Flashing point 60...

Page 77: ...work Correct arrangement 57 Wrong arrangement 57 S Setting and activating password 52 Setting operating principle alarm relays 39 Setting response values Alarm1 Alarm2 39 Standards 68 Status number 71 System leakage capacitance max adaptation 44 T Technical data 63 TEST button 30 Topology RS 485 57 W Wiring 57 ...

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Page 80: ...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 com Web http www bender de com ...

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