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MI 3101 EurotestAT: Measurements

Continuity

50

5.2.3 Compensation of test leads resistance

This chapter describes common principle for compensation of test leads resistance for
both CONTINUITY functions. The compensation is required to eliminate the influence of
test leads resistance plus internal resistances of the instrument. The lead compensation is
very important to obtain correct result. The compensation status (

/

) is indicated

in the message field.

Key:

F1

Enters test leads resistance compensation menu for any of mentioned
functions.

See chapter

4.2 Single test

for functionality of keys.

Figure 5.10: Test leads resistance

compensation menu

Keys:

TEST

Performs compensation



/



Sets function to be compensated

The instrument compensates following Continuity subfunctions.

Compensation NPE

Same compensation for both

7 mA

and

200

mA

measurements.

Short N and PE terminals.

Compensation LPE

Same compensation for both

7 mA

and

200

mA

measurements.

Short L and PE terminals

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Summary of Contents for EurotestAT MI 3101

Page 1: ...EurotestAT MI 3101 Instruction manual Version 5 0 HW 5 Code no 20 751 834 ...

Page 2: ...l metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2005 2010 METREL No part of this publication may be reproduced or utilized in any form or by any means without permission in writing from METREL ...

Page 3: ...strument operation 22 4 1 Main menu 22 4 2 Single test 23 4 3 Automatic testing 24 4 3 1 Auto sequence number main menu 26 4 3 2 Auto sequence set 26 4 3 3 Test parameters in auto sequence 27 4 3 4 Name and description of auto sequence 28 4 3 5 Storing auto sequence settings sequence number name 29 4 3 6 Pause flag and comments in auto sequence 30 4 3 7 Setting pause flag and comments 30 4 3 8 Bui...

Page 4: ...ecalling test results and parameters 81 6 4 1 Recalling result 81 6 5 Clearing saved data 83 6 5 1 Clearing specialties 84 6 6 Editing installation data structure 85 6 6 1 Adding new locations 85 6 7 Communication 87 6 8 Operation with barcode scanner 88 7 Maintenance 89 7 1 Replacing fuses 89 7 2 Cleaning 89 7 3 Periodic calibration 89 7 4 Service 89 8 Technical specifications 90 8 1 Insulation r...

Page 5: ...reference 110 E 2 Fundamentals 110 E 3 MI 3101 guides 110 E 3 1 MI 3101 functions and reduced low voltage systems 111 E 4 Technical specifications 113 E 4 1 RCD 113 E 4 2 Fault loop impedance and prospective short circuit current 115 E 4 3 Line impedance and prospective short circuit current 117 F Appendix F Country notes 118 F 1 List of country modifications 118 F 2 Modification issues 118 F 2 1 ...

Page 6: ... line loop impedance RCD protection Resistance to earth Tracing the installation Overvoltage protection devices Specific earth resistance measurement Tests can be performed on the following supply systems TN TT IT 110 V reduced low voltage 2 x 55 V and 110 V reduced low voltage 3 x 63 V The high resolution graphic display with backlight offers easy reading of results indications measurement parame...

Page 7: ...arried out only by a competent authorized person Use only standard or optional test accessories supplied by your distributor Consider that older and some of new optional test accessories compatible with this instrument meet overvoltage category CAT III 300 V It means that maximum allowed voltage between test terminals and ground is 300 V Instrument contains rechargeable NiCd or NiMh battery cells ...

Page 8: ...ry compensate test lead resistance before performing continuity measurement see 5 2 3 Measuring the resistance of wire wound components like transformer or motor windings is possible only in continuous function R7mA due to great influence of the winding inductance RCD functions Parameters set in one function are also kept for other RCD functions The measurement of contact voltage will not trip out...

Page 9: ...acy of tested parameters is valid only if mains voltage is stable during the measurement and no additional operating circuits are connected in parallel L and N test terminals are reversed automatically according to detected terminal voltage Earth resistance High currents and voltages in earthing could influence the measurement results High resistance of S and H probes could influence the measureme...

Page 10: ...er the power supply adapter is connected to the instrument Internal circuit controls charging assuring maximum battery lifetime Power supply socket polarity is shown in figure 2 2 Figure 2 2 Power supply socket polarity The instrument automatically recognizes connected power supply adapter and controls charging Symbols Indication of battery charging 7 2 Battery voltage 7 2 Figure 2 3 Charging indi...

Page 11: ...or at least two times Four cycles are recommended Complete discharge charge cycle is performed automatically for each cell using external intelligent battery charger Notes The charger in the instrument is a pack cell charger This means that the battery cells are connected in series during the charging The battery cells have to be equivalent same charge condition same type and age One different bat...

Page 12: ...in TT and TN systems Part 7 Phase sequence Part 10 Combined measuring equipment Other reference standards for testing RCDs EN 61008 Residual current operated circuit breakers without integral overcurrent protection for household and similar uses EN 61009 Residual current operated circuit breakers with integral overcurrent protection for household and similar uses EN 60755 General requirements for ...

Page 13: ...cation 3 F2 Confirmation of name entered in edit mode Enters memory editing mode 4 F1 Deletes character on the left in edit mode 5 MEM Handling with memory 6 ESC Exits selected and displayed option 7 TAB Jumps between display windows Cursors Selection of tested function and its working parameters Initiates measurements 8 Cursor keypad with TEST key TEST Acts also as the PE touching electrode 9 BAC...

Page 14: ...tor Communication with PC serial port and connection to optional measuring adapters 4 Protection cover Protects from simultaneous access to test connector and power supply adapter socket plus communication connectors 5 USB connector Communication with PC USB 1 1 port Warnings Maximum allowed voltage between any test terminal and ground is 600 V Maximum allowed voltage between test terminals is 550...

Page 15: ...ews for battery fuse compartment cover 5 6 4 1 2 3 F1 F3 F2 Fuse Fuse Fuse SIZE AA SIZE AA SIZE AA SIZE AA SIZE AA SIZE AA S N XXXXXXXX Figure 3 4 Battery and fuse compartment Legend 1 Fuse F1 T 315 mA 250 V 2 Fuse F2 T 4 A 500 V 3 Fuse F3 T 4 A 500 V 4 Serial number label 5 Battery cells Size AA alkaline rechargeable NiMH or NiCd 6 Battery holder Can be removed from the instrument ...

Page 16: ...R U I C S S C N R 0 1999 I 0 A kA L N L PSC 17 20 1 4 Nominal voltage 100V 440V 15Hz 500Hz Line impedance EN 61557 3 Fault loop EN 61557 3 R 0 1999 I 0 A kA PFC 14 1 4 Nominal voltage 100V 264V 15Hz 500Hz impedance L PE 17 Voltage frequency U 0V 440V f 15Hz 500Hz Phase rotation EN 61557 7 Nominal voltage 100V 440V 1 00 Results 1 2 3 or 2 1 3 5Hz 5 Hz RCD EN 61557 6 I 10mA 30mA 100mA 300mA 500mA 1A...

Page 17: ...ee 4 4 2 Supply system Online voltage is displayed together with test terminal indication L and N test terminals are used for selected measurement L and PE are test terminals N terminal should also be connected for reference in measuring circuit Polarity of test voltage applied to the output terminals Insulation test two measuring terminals should be shorted Three phase connection indicator TT TN ...

Page 18: ...s applied to the test terminals Measurement is running consider displayed warnings Conditions on the input terminals allow starting the measurement TEST key consider other displayed warnings and messages Conditions on the input terminals do not allow starting the measurement TEST key consider displayed warnings and messages Test leads resistance in CONTINUITY tests is not compensated see Chapter 5...

Page 19: ...e information refer to chapter 4 8 5 Recalling original settings CAL ERROR Service intervention required 3 5 6 Sound warnings Periodic sound Warning Dangerous voltage on the PE terminal is detected Refer to chapter 5 8 for more information 3 5 7 Help Key HELP Opens help screen The help menu contains some basic schematic connection diagrams to illustrate recommended connection of the instrument to ...

Page 20: ...can be adjusted Click Toggle backlight intensity level Keep pressed for 1 s Lock high intensity backlight level until power is turned off or the key is pressed again Keep pressed for 2 s Bargraph for LCD contrast adjustment is displayed Figure 3 8 Contrast adjustment menu Keys for contrast adjustment Reduces contrast Increases contrast TEST Accepts new contrast ESC Exits without changes ...

Page 21: ...bag test cable connected to the instrument through the front aperture 3 7 Instrument set and accessories 3 7 1 Standard set Instrument Soft carrying bag Short instruction manual Product verification data Warranty declaration Declaration of conformity Universal test cable Three test tips Schuko plug commander Three alligator clips Power supply adapter CD with instruction manual handbook Measurement...

Page 22: ...u 22 4 Instrument operation 4 1 Main menu From the Main menu different instrument operation modes can be set Single test menu see 4 2 Auto sequence menu see 4 3 Miscellaneous see 4 4 Figure 4 1 Main menu Keys Select the mode TEST Enters selected mode ...

Page 23: ...Transient suppressor test Select sub function in selected measurement function TEST Runs selected test measurement function TAB Enters test parameters field ESC Exits single test operation mode MEM Stores measured results recalls stored results Keys in test parameter field Select measuring parameter Change the selected parameter TEST TAB ESC Exit back to main single test screen General rule for en...

Page 24: ... comments menu and auto sequence main menu If the conditions at input terminals are valid the test will proceed after pressing the TEST key Press the F1 key to skip the paused function The test will continue with the next test if any or will end Press the ESC key to skip the remaining functions and finish the auto sequence The set of measurements will be performed in sequential manner until the co...

Page 25: ...Overall FAIL result is reported if one or more performed tests failed Figure 4 4 Waiting for right input condition to proceed Figure 4 5 Overall PASS example Figure 4 6 Overall FAIL example Viewing auto sequence particular results After finished auto sequence press the key to move focus into sequence field Press TEST key Result of selected function is displayed Press the key or to select the next ...

Page 26: ... changes F1 Enters editor to rename selected test sequence and enter its description see 4 3 4 Enters menu for setting pause flag and comments see 4 3 7 F2 Saves entered test sequence see 4 3 5 MEM Stores recalls AUTO SEQUENCE results Function selection Parameter selection Figure 4 7 Example of setting auto sequence sequence For each of 6 predefined sequence steps any of the following measurement ...

Page 27: ...Select test parameter value or enable disable parameter Select test parameter TEST TAB ESC Return to auto sequence main screen Whenever a new function is selected for auto sequence its test parameters should be verified and changed to appropriate values states Test parameter merging When the prepared sequence from section 4 3 2 contains selected at least two of Zline Zloop or RCD is possible to me...

Page 28: ... selected field 2nd level ESC Returns to auto sequence main menu without changes Figure 4 10 Auto sequence name edit menu Figure 4 11 Auto sequence description edit menu Keys for 2nd level Highlighted key Selected symbol or activity Select symbol or activity TEST Enters selected symbol or performs selected activity F1 Deletes last entered symbol in the name line F2 Confirms name and returns to 1st...

Page 29: ...quence number TEST Confirms the storing ESC Returns to auto sequence main menu without changes Auto sequence settings are stored in nonvolatile memory Stored auto sequence procedures remain in memory until the user changes them It is not possible to store any auto sequence in locked location Locked auto sequence can be copied in an unlocked location Stored sequence is unlocked in this case Figure ...

Page 30: ...s of screens during the pause in auto sequence Keys TAB Toggles between comment screen and auto sequence main screen TEST Continues with the paused test F1 Skip paused test ESC Skip all tests and ends auto sequence 4 3 7 Setting pause flag and comments Operator of the instrument can prepare comments regarding the measurements Warnings reconnection hints or other useful remarks related to the test ...

Page 31: ...dit comments menu for selected comment number TEST Confirms pause and comment selection and returns to auto sequence main menu ESC Returns to auto sequence main menu without changes Comments can be entered and edited in the Edit comments menu Maximum comment length 250 characters including space and new line characters Figure 4 18 Comments edit menu Keys Highlighted key Selected symbol or activity...

Page 32: ...e following way By storing the existing auto sequence under another auto sequence number see 4 3 5 By changing an existing auto sequence and saving it under the same auto sequence number not possible for locked auto sequence By building a new auto sequence Building a new auto sequence In the main menu see 4 1 select auto sequence Press the TEST key Select auto sequence number see 4 3 2 Repeat unti...

Page 33: ...l current RCD trip out time at increased current 5 x I N The name of test sequence number 10 is Sock 6A 30mA AC Description of the test sequence is Verification of wall socket protected with fuse and RCD For the measurement the following conditions shall apply Equipotential bonding resistance and insulation resistance measurement has to be performed on de energized socket Equipotential bonding res...

Page 34: ...lect CONTINUITY TAB 4 3 2 Enter test parameter selection mode TEST R200mA Limit ON Limit 0 1 5 2 Set test parameters for equipotential bonding resistance TAB 4 3 2 Exit parameter mode F1 4 3 2 Set PAUSE wait to prepare for measurement 4 3 7 Set PAUSE ON 4 3 7 Select COMMENT 4 3 7 Select COMMENT 1 F1 4 3 7 Enter Edit comment menu Disconnect mains univ cable ext 4 3 7 Enter the comment F2 4 3 7 Save...

Page 35: ...cted pause and its comment 4 3 Next step 4 3 2 Select Z LINE TAB 4 3 2 Enter test parameter selection mode FUSE type gG FUSE I 6A FUSE T 5s 5 5 Set test parameters for line impedance and fuse test TAB 4 3 2 Exit parameter mode 4 3 Next step 4 3 2 Select RCD TAB 4 3 2 Enter test parameter selection mode TEST Tripout current Idn 30mA type G Ulim 50V 5 3 Test parameters for RCD trip out current test ...

Page 36: ...ment operation Automatic testing 36 TAB 4 3 2 Exit parameter mode 6 x 4 3 Exit the editing of sequence field F2 4 3 5 Store prepared test sequence TEST 4 3 5 Confirm storing Figure 4 21 Auto sequence screen of the example above ...

Page 37: ...election of communication port Setting the instrument to initial values Entering locator function Selection of operator Figure 4 22 Options in Miscellaneous menu Keys Selection of option TEST Enters selected option ESC Returns to the main menu 4 4 1 Language The instrument supports different languages Figure 4 23 Language selection Keys Select language TEST Confirms selected language and exits to ...

Page 38: ...55 V center tap grounded 110 V reduced low voltage 3 x 63 V three phase star center grounded TN TT and IT systems are defined in EN 60364 1 standard 110 V reduced low voltage systems are defined in BS 7671 See Appendix D for particular characteristics of IT supply system measurements and instrument characteristics See Appendix E for particular characteristics of 110 V reduced low voltage supply sy...

Page 39: ...0 ms 60 ms t 200 ms 50 ms t 150 ms Trip out times according to AS NZ I N I N 2 I N 5 I N RCD type I N mA t t t t Note I 10 40 ms 40 ms 40 ms II 10 30 300 ms 150 ms 40 ms III 30 999 ms 300 ms 150 ms 40 ms 500 ms 200 ms 150 ms Maximum break time IV S 30 999 ms 130 ms 60 ms 50 ms Minimum non actuating time Minimum test period for current of I N RCD shall not trip out Test current and measurement accu...

Page 40: ...ts this option TEST Enters selected option 4 4 4 Date and time Date and time can be set in this menu Figure 4 26 Setting date and time Keys Selects the field to be changed Modify selected field ESC Exits date and time setup without changes TEST Confirms new setup and exits 4 4 5 Initial settings Instrument settings and measurement parameters and limits are set to their initial values in this menu ...

Page 41: ...ance value OFF Continuity High limit resistance value OFF INSULATION Nominal test voltage 500 V Low limit resistance value OFF Selected test leads combination LN Z LINE Fuse type none selected ΔU Limit 4 0 Zref 0 00 Ω Z LOOP Protection Fuse Fuse type none selected 2 line loop impedance m L N Fuse type none selected RCD RCD t Nominal differential current I N 30 mA RCD type G Test current starting p...

Page 42: ...anges Unlocking autotests and comments Protection flag key for all default auto test sequences and associated comments will be cleared Figure 4 29 Other settings dialogue TEST Unlocks locked auto test sequences ESC Exits the menu without changes Units selection Unit for specific earth resistance will be selected Figure 4 30 Other settings dialogue Select distance units TEST Enters selected distanc...

Page 43: ...ables tracing electrical lines Keys TEST Starts locator function ESC Exits miscellaneous menu See chapter 5 10 Locator for locator operation 4 4 8 Operator This menu enables registering the operator of the instrument Selected operator name appears on the bottom of the LCD during turning on of the instrument It is also associated to stored measurement results Up to 5 operators can be defined Figure...

Page 44: ...Operator name edit menu Keys Highlighted key Selected symbol or activity Select symbol or activity TEST Enters selected symbol or performs selected activity F1 Deletes last entered symbol in the name line F2 Confirms comment and returns to operator main menu ESC Deletes operator immediately after entering the editor Returns to operator main menu without changes ...

Page 45: ...d cables Resistance of semi conductive antistatic floors See chapter 4 2 Single test for functionality of keys Figure 5 1 Insulation resistance Test parameters for insulation resistance measurement TEST Test configuration L N L PE N PE L PE N PE L N L PE ALL Uiso Test voltage 50 V 100 V 250 V 500 V 1000 V Limit Minimum insulation resistance OFF 0 1 M 200 M L PE N PE L N L PE ALL 20 M Test circuits...

Page 46: ...d tested item see figures 5 2 and 5 3 Press the TEST key for measurement keep pressing for continuous measurement After the measurement is finished wait until tested item is discharged Store the result optional Figure 5 4 Examples of insulation resistance measurement results Displayed results Rln Insulation resistance between L and N Rlpe Insulation resistance between L and PE Rnpe Insulation resi...

Page 47: ... to EN 61557 4 between L and PE terminals test current 200 mA Continuous resistance measurement with lower test current between N and PE terminals test current ca 7 mA Continuous resistance measurement with lower test current between L and PE terminals test current ca 7 mA See chapter 4 2 Single test for functionality of keys Figure 5 5 Continuity Test parameters for resistance measurement TEST Re...

Page 48: ...n Set sub function R200mA L PE or N PE Enable and set limit optional Connect test cable to the instrument Compensate test leads resistance if necessary Disconnect from mains supply and discharge tested installation Connect test leads to the tested PE wiring see figure 5 6 Press the TEST key for measurement After the measurement is finished store the result optional Figure 5 7 Example of continuity...

Page 49: ...versal test cable application Continuous resistance measurement procedure Select the CONTINUITY function Set sub function R 7mA L PE or N PE Enable and set limit optional Connect test cable to the instrument Compensate test leads resistance if necessary Disconnect from mains supply and discharge tested object Connect test leads to the tested object see figure 5 8 Press the TEST key for continuous ...

Page 50: ...rect result The compensation status is indicated in the message field Key F1 Enters test leads resistance compensation menu for any of mentioned functions See chapter 4 2 Single test for functionality of keys Figure 5 10 Test leads resistance compensation menu Keys TEST Performs compensation Sets function to be compensated The instrument compensates following Continuity subfunctions Compensation N...

Page 51: ...ion of test leads resistance procedure Select the CONTINUITY function any Connect test cable to the instrument and short N PE or L PE terminals see figure 5 11 Press the F1 key to open test leads resistance compensation menu Press the TEST key for measurement and compensation of test leads resistance Press the ESC key to return to function menu Note 20 is limit value for test leads resistance comp...

Page 52: ...00 mA type RCD type test current waveform plus starting polarity MUL Actual test current relative to rated Idn 1 2 5 Ulim Conventional touch voltage limit 25 V 50 V The instrument is intended for testing of General non delayed and S elective time delayed RCDs which are suited for Alternating residual current AC type marked with symbol Pulsating residual current A type marked with symbol DC residua...

Page 53: ...then normalized to the rated I N Contact voltage measurement procedure Select the RCD function Set sub function Uc Set test parameters if necessary Connect test cable to the instrument Connect test leads to the tested object see figure 5 13 Press the TEST key After the measurement is finished store the result optional Displayed contact voltage relates to the rated nominal residual current of the R...

Page 54: ...D t Trip out time measurement verifies the sensitivity of an RCD at different residual currents Trip out time measurement procedure Select the RCD function Set sub function Tripout time t Set test parameters if necessary Connect test cable to the instrument Connect test leads to the tested object see figure 5 13 Press the TEST key After the measurement is finished store the result optional Figure ...

Page 55: ...0 mA 0 2 I N 2 2 I N Pulsed B 0 2 I N 2 2 I N DC Maximum test current is I trip out current or end value in case the RCD didn t trip out Trip out current measurement procedure Select the RCD function Set sub function Tripout current Set test parameters if necessary Connect test cable to the instrument Connect test leads to the tested object see figure 5 13 Press the TEST key After the measurement ...

Page 56: ...CD Autotest steps Notes Select the RCD function Set sub function AUTO Set test parameters if necessary Connect test cable to the instrument Connect test leads to the tested object see figure 5 13 Press the TEST key Start of test Test with I N 0 step 1 RCD should not trip out Test with I N 180 step 2 RCD should not trip out Test with I N 0 step 3 RCD should trip out Re activate RCD Test with I N 18...

Page 57: ...p 5 trip out time 5 I N 0º Step 6 trip out time 5 I N 180º Uc Contact voltage for rated I N Notes The autotest sequence is immediately stopped if any incorrect condition is detected e g excessive Uc or trip out time out of bounds Auto test is finished without tests in case of testing the RCD type A with rated residual currents of I n 300 mA 500 mA and 1000 mA In this case auto test result passes i...

Page 58: ...test for active keys Figure 5 18 Fault loop impedance Test parameters for fault loop impedance measurement Protection Selection of main protection device in fault loop RCD FUSE Fuse type Selection of fuse type NV gG B C K D Fuse I Rated current of selected fuse Fuse T Maximum breaking time of selected fuse Isc_lim Minimum short circuit current for selected fuse combination See Appendix A for refer...

Page 59: ...of loop impedance Prospective fault current ISC is calculated from measured impedance as follows Z k Un I SC SC where Un Nominal UL PE voltage see table below ksc Correction factor for Isc see chapter 4 4 2 Un Input voltage L PE 110 V 93 V UL PE 134 V 230 V 185 V UL PE 266 V Notes High fluctuations of mains voltage influence the measurement results The noise sign is displayed in the message field ...

Page 60: ... circuit s fuse The limit values are described in the standard EN 60364 5 52 Sub functions Z LINE Line impedance measurement according to EN 61557 3 ΔU Voltage drop measurement Figure 5 21 Line impedance See 4 2 Single test for keys functionality Figure 5 22 Voltage drop Test parameters for line impedance measurement TEST Selection of sub function Z ΔU FUSE Type Selection of fuse type NV gG B C K ...

Page 61: ...NE function Select the Z sub function Select test parameters optional Connect test cable to the instrument Connect test leads to the tested object see figure 5 23 Press the TEST key After the measurement is finished store the result optional Line to neutral Line to line Figure 5 24 Examples of line impedance measurement result Displayed results Z Line impedance ISC Prospective short circuit curren...

Page 62: ...ually the impedance at the switchboard Circuits for voltage drop measurement Figure 5 25 Phase neutral or phase phase voltage drop measurement connection of plug commander and 3 wire test lead Voltage drop measurement procedure Step 1 Measuring the impedance Zref at electrical installation origin Select the Z LINE function Select the ΔU sub function Select test parameters optional Connect test cab...

Page 63: ...voltage range L N or L1 L2 110 V 93 V UL N 134 V 230 V 185 V UL N 266 V 400 V 321 V UL L 485 V Note If the reference impedance is not set the value of Zref is considered as 0 00 Ω The Zref is cleared set to 0 00 Ω if pressing F1 key while instrument is not connected to a voltage source ISC is calculated as described in chapter 5 5 1 Line impedance and prospective short circuit current If the measu...

Page 64: ...asurement conforms to the EN 61557 7 standard See 4 2 Single test for keys functionality Figure 5 27 Voltage in single phase system Test parameters for voltage measurement There are no parameters Circuits for voltage measurement L3 L2 L1 N PE N L2 N L2 L L1 L L1 PE L3 PE L3 result 1 2 3 result 2 1 3 Figure 5 28 Connection of universal test cable and optional adapter in three phase system L1 L2 L3 ...

Page 65: ...n Figure 5 30 Examples of voltage measurement in three phase system Displayed results for single phase system Uln Voltage between phase and neutral conductors Ulpe Voltage between phase and protective conductors Unpe Voltage between neutral and protective conductors f frequency Displayed results for three phase system U12 Voltage between phases L1 and L2 U13 Voltage between phases L1 and L3 U23 Vo...

Page 66: ...available Standard 3 wire for standard resistance to earth measurements Specific earth resistance by using optional external adapter See 4 2 Single test for keys functionality Figure 5 31 Resistance to earth Test parameters for earth resistance measurement TEST Test configuration 3 wire Limit Maximum resistance OFF 1 5 k If selected Distance Distance between probes 0 1 m 30 0 m or 1 ft 100 ft 5 7 ...

Page 67: ... function Enable and set limit optional Connect test cable to the instrument Disconnect tested object from mains supply Connect test leads to the tested object see figures 5 32 and 5 33 Press the TEST key After the measurement is finished store the result optional Figure 5 34 Example of resistance to earth measurement result Displayed results for earth resistance measurement R Earth resistance Rc ...

Page 68: ...ific earth resistance measurement with adapter Specific earth resistance measurement procedure Select the EARTH function Connect adapter to the instrument Select measurement Select distance unit optional Set distance optional Connect test leads of adapter to tested object see figure 5 35 Press the TEST key After the measurement is finished store the result optional Figure 5 36 Example of specific ...

Page 69: ...red The measurement is covered by requirements of the EN 61557 3 standard See chapter 4 2 Single test for functionality of keys Figure 5 37 Impedance adapter connected Test parameters for 2 line loop impedance measurement Function Z LINE Test Impedance function m L N m L L Functions Z LINE and Z LOOP FUSE type Selection of fuse type NV gG B C K D FUSE I Rated current of selected fuse FUSE T Maximu...

Page 70: ...ion Press the TEST key for measurement Store the result optional Figure 5 39 Example of 2 line loop measurement results Displayed results Z Line loop impedance ISC Prospective short circuit current R Resistive part of line impedance Xl Reactive part of line impedance The following parameters are displayed in sub screen for single phase line impedance measurement IscMaxL N Maximum prospective short...

Page 71: ...wing parameters are displayed in sub screen for loop impedance measurement IscMaxL Pe Maximum prospective fault current IscMinL Pe Minimum prospective fault current IscStd Standard prospective fault current Ub Contact voltage at maximum prospective fault current Contact voltage is measured against probe S Notes For application and technical data of the Impedance adapter A1143 see its user manual 2...

Page 72: ...wiring see examples below When touching the TEST key in all functions that require mains supply the user automatically performs this test Examples for application of PE test terminal L1 N PE Reversed phase and protection conductors T MOST DANGEROUS SITUATION HE Figure 5 40 Reversed L and PE conductors application of plug commander L1 N Reversed phase and protection conductors MOST DANGEROUS SITUAT...

Page 73: ...is detected on the tested PE terminal immediately stop all measurements find and remove the fault Notes In main and miscellaneous menus the PE terminal is not tested PE test terminal does not operate in case the operator s body is completely insulated from floor or walls 5 10 Locator This function is intended for tracing mains installation like Tracing lines Finding shorts breaks in lines Detectin...

Page 74: ...eceiver R10K Figure 5 44 Locating individual fuses Line tracing procedure Select the LOCATOR function in MISC menu Connect test cable to the instrument Connect test leads to the tested object see figures 5 43 and 5 44 Press the TEST key Trace lines with receiver in IND mode or receiver plus its optional accessory After tracing is finished press the ESC key to stop generating test signal LOCATOR Fi...

Page 75: ...ter 4 2 Single test for functionality of keys Figure 5 46 Varistor test menu Test parameters for varistor test Lo limit Low limit DC threshold voltage 50 V 1000 V Hi limit High limit DC threshold voltage 50 V 1000 V It 1 00 mA Threshold current Test circuit for varistor test L1 L2 L3 N PE mains voltage switched off opened switches N L2 L L1 PE L3 permanent loads disconnected Figure 5 47 Connection...

Page 76: ...ltage device Connect test cable to the instrument and tested item see figure 5 47 Press the TEST key for measurement After the measurement is finished wait until tested item is discharged Store the result optional Figure 5 48 Example of varistor test result Displayed results U Measured threshold voltage at It 1 mA Uac Rated AC voltage Uac is calculated from U according to Uac U 1 6 ...

Page 77: ...ed and grouped in a structured manner that equals the structure of the tested electrical installation If a test plan for verification of electrical installation is prepared it is possible to organize the data structure according to it Each tested location place like room floor installation node switchgear etc can be reflected as its own location in memory Simple browsing through structure and resu...

Page 78: ...n this level Sub level level 3 in the structure 3PH SOCKET location name 1 3 No of selected available locations on this level Results field stored results in the selected location Arrows point to existing non displayed structure locations Available memory information No of stored test results in selected location No of all stored test results in complete structure Option for opening the structure ...

Page 79: ... current location HELP Enters installation structure tree screen ESC Back to the last operation mode of the instrument Note The tree structure is limited to 2000 locations with 10 levels in depth see figure 6 3 Figure 6 3 Sub levels depth definition Figure 6 4 shows how individual structure elements are displayed on the instrument The outlook is the same for all three memory menus Figure 6 4 Data ...

Page 80: ...d a new location in the structure see 6 6 1 MEM Saves test results to the last position in selected location and returns to the measuring menu TAB Toggles between results and structure data fields see 6 3 1 ESC Exits save test menu F1 Edits name of selected location see 4 3 4 F2 Enters installation structure tree view to select appropriate location Notes Press the MEM key twice to quickly store th...

Page 81: ...meters Press the MEM key in single or auto sequence menu when there is no result available for storing or select in MISC menu See 6 2 for definitions of displayed fields Figure 6 7 Main recall menu Keys in main recall memory menu Short press select the location in structure of installation data field Pressed for a few seconds in some cases add a new location in the structure see 6 6 1 TAB Toggles ...

Page 82: ... selected stored item TAB ESC Back to recall memory main menu Key ESC Back to recall memory main menu Figure 6 9 Stored single test example Keys Select stored data TEST Opens function result ESC Back to recall memory main menu Key in open function result ESC Back to observed auto sequence Figure 6 10 Auto sequence stored example ...

Page 83: ...ms selected option ESC Cancels dialog without changes In select option to delete particular result or modify installation data structure Figure 6 12 Clear test menu Keys Select location TEST Opens dialog for clearing in installation data structure TAB Moves focus into result field for selection of surplus result see 6 5 1 F2 Enters installation structure tree view to select appropriate location F1...

Page 84: ...est TEST Opens dialog for clearing selected test ESC Back to last mode of the instrument Keys in opened dialog Select YES NO TEST Confirms selected option ESC Cancels without changes Legend for clearing in installation data structure Results in current location Results in sub locations Remove current location and its sub locations Figure 6 14 Clear in installation data structure menu Keys Select o...

Page 85: ...n the structure see 6 6 1 F2 Enters installation structure tree view to select appropriate location F1 Renames the current location ESC Back to the last operation mode of the instrument for 2 seconds Opens dialog box for adding new location at the same level Active only if selected location is the last in the level Name of the new location Same name as previous 1 for 2 seconds Opens dialog box for...

Page 86: ...nu Keys F2 Changes structure view TEST Confirms the new location F1 Enters name of the location Figure 6 17 Dialog box for new location Enter name of the location Key F2 Confirms the name Figure 6 18 Entering name for the new location Key MEM Saves results into the location Figure 6 19 Location prepared Figure 6 20 Stored example ...

Page 87: ...COM port to the instrument PS 2 connector using the PS 2 RS232 serial communication cable USB selected connect a PC USB port to the instrument USB connector using the USB interface cable Power on the PC and the instrument Run the program Eurolink The PC and the instrument automatically recognize each other The program on the PC enables the following possibilities Downloading data Clearing storage ...

Page 88: ...labeled installation structure elements How to read data with barcode scanner Connect barcode scanner to PS 2 communication port In Edit location menu see chapter 6 6 figure 6 18 the location name can be alternatively read from barcode Note Proper operation is assured only with barcode scanners supplied by METREL For support of different barcode format refer to Barcode reader s manual Maximal leng...

Page 89: ... cover hazardous voltage inside Replace blown fuse with original type only otherwise the instrument may be damaged and or operator s safety impaired Position of fuses can be seen in Figure 3 4 in chapter 3 3 Back panel 7 2 Cleaning No special maintenance is required for the housing To clean the surface of the instrument use a soft cloth slightly moistened with soapy water or alcohol Then leave the...

Page 90: ...range according to EN61557 is 0 34 M 30 0 M Measuring range M Resolution M Accuracy 0 00 19 99 0 01 20 0 30 0 0 1 10 of reading 5 digits Voltage Measuring range V Resolution V Accuracy 0 1200 1 3 of reading 3 digits Nominal voltages 50 VDC 100 VDC 250 VDC 500 VDC 1000 VDC Open circuit voltage 0 20 of nominal voltage Measuring current min 1 mA at RN UN 1 k V Short circuit current max 0 6 mA Specifi...

Page 91: ...umber of possible tests 2000 with a fully charged battery Automatic polarity reversal of the test voltage 8 2 2 Resistance R7mA LPE NPE Measuring range Resolution Accuracy 0 0 19 9 0 1 20 1999 1 5 of reading 3 digits 2000 9999 1 Indicator only Open circuit voltage 6 5 VDC 9 VDC Short circuit current max 8 5 mA Test lead compensation up to 20 8 3 RCD testing 8 3 1 General data Nominal residual curr...

Page 92: ...contact voltage 50V Measuring range V Resolution V Accuracy 0 0 19 9 0 1 0 15 of reading 10 digits 20 0 99 9 0 15 of reading The accuracy is valid if mains voltage is stabile during the measurement and PE terminal is free of interfering voltages Test current max 0 5 I N Limit contact voltage 25 V 50 V Specified accuracy is valid for complete operating range 8 3 3 Trip out time Complete measurement...

Page 93: ...uring the measurement and PE terminal is free of interfering voltages Measurement can not be performed for I N 1000 mA RCD type B Specified accuracy is valid for complete operating range 8 4 Fault loop impedance and prospective fault current 8 4 1 No disconnecting device or FUSE selected Fault loop impedance Measuring range according to EN61557 is 0 25 19999 Measuring range Resolution Accuracy 0 0...

Page 94: ... fault loop impedance measurement Nominal voltage range 30 V 500 V 14 Hz 500 Hz No trip out of RCD R XL values are indicative 8 5 Line impedance prospective short circuit current and Voltage drop Line impedance Measuring range according to EN61557 is 0 25 19 9 k Measuring range Resolution Accuracy 0 00 9 99 0 01 10 0 99 9 0 1 100 999 1 1 00k 9 99k 10 10 0k 19 9k 100 5 of reading 5 digits Prospecti...

Page 95: ... type True r m s trms Nominal frequency range 0 Hz 14 Hz 500 Hz 8 6 3 Frequency Measuring range Hz Resolution Hz Accuracy 0 00 999 99 0 01 0 2 of reading 1 digit Nominal voltage range 10 V 550 V 8 7 Online terminal voltage monitor Measuring range V Resolution V Accuracy 10 550 1 2 of reading 2 digits 8 8 Earth resistance Earth resistance three wire method Measuring range according to EN61557 is 0 ...

Page 96: ...1k 10 0k 99 9k 0 1k 100k 1k See accuracy note Measuring range ft Resolution ft Accuracy 0 0 99 9 0 1 100 999 1 1 00k 9 99k 0 01k 10 0k 99 9k 0 1k 100k 1k See accuracy note Principle 2 distance Re with Re as measured resistance in 4 wire method Accuracy note Accuracy of the specific earth resistance result depends on measured resistance Re and is as follows Measuring range Accuracy 1 00 1999 5 of m...

Page 97: ...C I 2 L L 2 L L L L X R Z 2 L L 2 L L HOT L L X R 5 1 Z 2 N L 2 N L N L X R Z 2 N L 2 N L HOT N L X R 5 1 Z UN L N 230 V 10 UN L L 400 V 10 230 V UN 400 V CMAX 1 05 1 10 CMIN 0 95 1 00 8 9 2 High precision fault loop impedance Measuring range according to EN61557 is 5 0 1999 m Measuring range m Resolution m Accuracy 0 0 199 9 0 1 200 1999 1 5 1 m Nominal voltage range 100 V 440 V Nominal frequency...

Page 98: ...uring range V Resolution V Accuracy 0 100 1 10 3 digits 8 10 Varistor test DC voltage Measuring range V Resolution V Accuracy 0 1000 1 3 of reading 3 digits AC voltage Measuring range V Resolution V Accuracy 0 625 1 Consider accuracy of DC voltage Measurement principle d c voltage ramp Test voltage slope 500 V s Threshold current 1 mA ...

Page 99: ...h d 23 cm 10 3 cm 11 5 cm Weight 1 32 kg without battery cells Reference conditions Reference temperature range 10 C 30 C Reference humidity range 40 RH 70 RH Operation conditions Working temperature range 0 C 40 C Maximum relative humidity 95 RH 0 C 40 C non condensing Storage conditions Temperature range 10 C 70 C Maximum relative humidity 90 RH 10 C 40 C 80 RH 40 C 60 C Locator supports inducti...

Page 100: ...7766 8 6066 6 4985 1 4096 4 2272 9 400 10577 7 7929 1 6632 9 5450 5 2766 1 500 13619 10933 5 8825 4 7515 7 3952 7 630 19619 3 14037 4 11534 9 9310 9 4985 1 710 19712 3 17766 9 14341 3 11996 9 6423 2 800 25260 3 20059 8 16192 1 13545 1 7252 1 1000 34402 1 23555 5 19356 3 16192 1 9146 2 1250 45555 1 36152 6 29182 1 24411 6 13070 1 Fuse type gG Disconnection time s 35m 0 1 0 2 0 4 5 Rated current A M...

Page 101: ...circuit current A 0 5 5 5 5 5 2 7 1 10 10 10 10 5 4 1 6 16 16 16 16 8 6 2 20 20 20 20 10 8 4 40 40 40 40 21 6 6 60 60 60 60 32 4 10 100 100 100 100 54 13 130 130 130 130 70 2 16 160 160 160 160 86 4 20 200 200 200 200 108 25 250 250 250 250 135 32 320 320 320 320 172 8 40 400 400 400 400 216 50 500 500 500 500 270 63 630 630 630 630 340 2 Fuse type K Disconnection time s 35m 0 1 0 2 0 4 Rated curr...

Page 102: ...rent A Min prospective short circuit current A 0 5 10 10 10 10 2 7 1 20 20 20 20 5 4 1 6 32 32 32 32 8 6 2 40 40 40 40 10 8 4 80 80 80 80 21 6 6 120 120 120 120 32 4 10 200 200 200 200 54 13 260 260 260 260 70 2 16 320 320 320 320 86 4 20 400 400 400 400 108 25 500 500 500 500 135 32 640 640 640 640 172 8 ...

Page 103: ...t lead 4m A 1012 Continuity 7mA Universal test cable Tip commander A 1176 Line impedance Voltage drop Universal test cable Plug commander Plug cable Tip commander A 1176 Fault loop impedance Universal test cable Plug commander Plug cable Tip commander A 1176 RCD testing Universal test cable Plug commander Plug cable Phase sequence Universal test cable Three phase cable A 1110 Three phase adapter A...

Page 104: ...ors can be connected via the rear connector Traced object must be energized when working with the EurotestAT Detectors Operation In built inductive sensor IND Tracing hidden wires Current clamp Connected trough the rear connector Locating wires Selective probe Connected trough the rear connector Locating fuses in fuse cabinets Buzzer Figure C 1 Receiver R10K The user can choose between three sensi...

Page 105: ...n Figure C 2 Detection of electromagnetic field L L1 N L 2 PE L3 Mains supply Receiver R10K in mode IND Lines energized Figure C 3 The EurotestAT as a signal source for tracing lines C 1 2 Positioning current clamp Whenever it is possible to embrace the traced wire it is recommended to use the appropriate current clamp instead of the receiver inductive sensor see figure below By using the clamp th...

Page 106: ...ngers behind the probe barrier to avoid electric shock and access of live parts C 2 Detection distances for different connections Connection Distance up to Connection between L and N wire in same wall socket 40 cm Connection between L wire in one wall socket and N wire in other wall socket with separated conduits 2 m WARNING Avoid connection of the EurotestAT in trace mode between line and PE of d...

Page 107: ...ntrol maximum leakage current Depending on application area additional impedance to the ground can be applied as presented in figure D 1 or through special loading equipment Value of the impedance should begin from 100 IT system represents additional level of protection to electric shock In the case of a failure of any line insulation to the PE through equipment failure wrong application or proced...

Page 108: ... devices RCMs Insulation fault location systems Overcurrent protective devices Residual current protective devices RCDs NOTE Where a residual current operating device RCD is used tripping of the RCD in the event of a first fault cannot be excluded due to capacitive leakage currents Testing of IT supply system is slightly different to standard tests in TN TT system D 3 Measurement guides The user h...

Page 109: ... Line functions Line Impedance Impedance ZLine Line Line Prospective Short circuit Current ISC for rated ULine Line Continuity functions Independent of selected supply system Insulation Resistance Independent of selected supply system Earth resistance Independent of selected supply system PE test probe Active but does not inhibit selected test if voltage is detected D 3 1 1 Voltage measurements Fi...

Page 110: ...neutral line Three phase star connection center tap connected to PE i e 3 x 63 V No neutral line Figure E 1 General reduced low voltage supply systems E 3 MI 3101 guides The user has to select the reduced low voltage supply system in the instrument before testing it The procedure for selecting the reduced low voltage supply system is defined in chapter 4 4 2 Supply system Isc factor RCD standard O...

Page 111: ...Tripping current RCD Automatic test Loop functions Fault Loop Impedance Both fault loops Z1 L1 PE and Z2 L2 PE Fault Loop Prospective Short circuit Current ISC1 and ISC2 for both fault loops Line functions Line Impedance Impedance Z Line Line Line Prospective Short circuit Current ISC for ULine Line 110 V Continuity functions Independent of selected supply system Insulation Resistance Independent ...

Page 112: ...on of IPSC is set to 110 V Nominal system voltage range for line impedance measurement is 90 V to 121 V If input voltage is out of range it is displayed on terminal voltage monitor together with the indicator of disabled test E 3 1 4 Fault loop impedance tests Definition of nominal system voltage for calculation of IPSC is changed to 55 V for single phase center tap system selected 63 V for three ...

Page 113: ...ine wave AC pulsed A DC offset for pulsed test current 6 mA typical RCD type G non delayed S time delayed Test current starting polarity 0 º or 180 º Nominal input voltage 55 V 63 V 14 Hz 500 Hz Test possibilities L1 PE and L2 PE Contact voltage UC Measuring range according to EN61557 is 20 0 V 31 0 V limit contact voltage 25 V Measuring range according to EN61557 is 20 0 V 62 0 V limit contact vo...

Page 114: ...icable for I N 1000 mA RCD type AC or I N 500 mA RCD type A Trip out current Trip out current Complete measurement range corresponds to EN 61557 requirements Measuring range I Resolution I Accuracy 0 2 I N 1 1 I N AC type 0 05 I N 0 1 I N 0 2 I N 1 5 I N A type I N 30 mA 0 05 I N 0 1 I N 0 2 I N 2 2 I N A type I N 30 mA 0 05 I N 0 1 I N Trip out time Measuring range ms Resolution ms Accuracy 0 300...

Page 115: ... Prospective fault current calculated value Measuring range A Resolution A Accuracy 0 00 9 99 0 01 10 0 99 9 0 1 100 999 1 1 00k 9 99k 10 10 0k 23 0k 100 Consider accuracy of fault loop impedance measurement The accuracy is valid if mains voltage is stable during the measurement IPSC calculation IPSC UN kSC ZL PE UN 55 V 44 V Uinp 61 V for selected 55 V single phase system UN 63 V 56 V Uinp 70 V f...

Page 116: ...eavy noise on mains voltage Prospective fault current calculated value Measuring range A Resolution A Accuracy 0 00 9 99 0 01 10 0 99 9 0 1 100 999 1 1 00k 9 99k 10 10 0k 23 0k 100 Consider accuracy of fault loop impedance measurement IPSC calculation IPSC UN ksc ZL PE UN 55 V 44 V Uinp 61 V for selected 55 V single phase system UN 63 V 56 V Uinp 70 V for selected 63 V three phase system Nominal i...

Page 117: ...of reading 5 digits Prospective short circuit current Measuring range according to EN61557 is 0 25 A 440A ksc 1 Measuring range A Resolution A Accuracy 0 00 0 99 0 01 1 0 99 9 0 1 100 999 1 1 00k 99 99k 10 100k 199k 1000 Consider accuracy of line impedance measurement The accuracy is valid if Mains voltage is stable during the measurement IPSC calculation IPSC UN ksc ZLine Line UN 110 V 90 V Uinp ...

Page 118: ...D Modified is the following related to the mentioned in the chapter 5 3 G type mentioned in the chapter is converted to unmarked type Added G type RCD Time limits are the same as for general type RCD Contact voltage is calculated the same as for general type RCD Modifications of the chapter 5 3 Test parameters for RCD test and measurement TEST RCD sub function test Tripout time t Uc AUTO Tripout c...

Page 119: ...Technical specifications remain the same F 2 2 ES modification CONTINUITY LOOP Re The procedure is intended for measurement the resistance of PE wiring between distribution board and individual wall sockets This is autotest only accessible procedure consisting of two special functions the LOOP Re and the CONTINUITY with LOOP Re sub function Test parameters for LOOP Re function This function does n...

Page 120: ...ce A intended for measurement at distribution board level shall contain function LOOP Re The second auto sequence sequence B intended for measurement of wall sockets and consumers shall contain CONTINUITY function with sub function LOOP Re PE wire resistance measurement procedure Select the AUTOSEQUENCE mode Select auto sequence A Connect test leads to the tested distribution board and the instrum...

Page 121: ...ith LOOP Re sub function operates only with the right connected test connection F 2 3 IT modification CONTINUITY LOOP Re The procedure is intended for measurement the resistance of PE wiring between distribution board and individual wall sockets This is auto test only accessible procedure consisting of two special functions the LOOP Re and the CONTINUITY with LOOP Re sub function Test parameters f...

Page 122: ...ce A intended for measurement at distribution board level shall contain function LOOP Re The second auto sequence sequence B intended for measurement of wall sockets and consumers shall contain CONTINUITY function with sub function LOOP Re PE wire resistance measurement procedure Select the AUTOSEQUENCE mode Select auto sequence A Connect test leads to the tested distribution board and the instrum...

Page 123: ...e_DB is kept in the instrument memory until new LOOP Re is done or the instrument initialized see 4 4 5 CONTINUITY with LOOP Re sub function operates only with the right connected test connection F 2 4 CH modification Change L N In the terminal voltage monitor see 3 5 1 the positions of L and N indications are opposite to standard version Voltage monitor example Online voltage is displayed togethe...

Page 124: ...ons see 4 2 is intended for visual inspections see G 1 1 G 1 1 Inspection Keys in main Inspection screen Select inspection type Aplicacion REBT 2002 Periodic inspection according to REBT 2002 Aplicacion REBT 1973 Periodic inspection according to REBT 1973 Hasta diciembre 1975 Periodic inspection according to requirements from 1975 TEST Starts selected inspection type F2 Clears all schedule flags T...

Page 125: ...1 Options in Miscellaneous menu G 2 1 Operation mode Standard measurements plus parameters or measurements with parameters that support UNE 202008 can be selected in this menu Figure G 2 Operation mode selection Keys Select operation mode TEST Confirms selected mode ESC Exits without changes G 3 Measurements This chapter contains description of operation of single tests inspection that are new or ...

Page 126: ...ype Aplicacion REBT 2002 Aplicacion REBT1973 Hasta diciembre 1975 Further keys are active after starting inspection F2 Clears all flags in selected schedule Select individual item in selected schedule Selected header line Apply same flag to all items in selected header Selected particular item Apply appropriate result flag to selected item Inspection procedure Select the INSPECTION function Select...

Page 127: ...ugh earth bond connections are effective Five subfunctions are available Earth bond resistance measurement according to EN 61557 4 between N and PE terminals test current 200 mA Earth bond resistance measurement according to EN 61557 4 between L and PE terminals test current 200 mA Continuous resistance measurement with lower test current between N and PE terminals test current ca 7 mA Continuous ...

Page 128: ...n Fuse I Rated current of fuse 6 A 10 A 16 A 20 A 25 A Uc Touch voltage limit 25 V 50 V RPE_lim Maximum PE resistance RPE_cal Calibrated value of PE resistance given by reference loop impedance measurement see G 3 3 Fault loop impedance and prospective fault current else Limit Maximum resistance OFF 0 1 20 0 Means no fuse selected G 3 2 1 Continuity R200 mA measurement See Chapter 5 2 1 Continuity...

Page 129: ...socket measurements R PE loop measurement procedure For reference measurement procedure see chapter G 3 3 Fault loop impedance and prospective fault current Select the CONTINUITY function Set sub function R PE loop Enable and select Fuse I optional Select maximum touch voltage Uc optional Connect test cable to the instrument Tested installation must be in normal operating condition with mains supp...

Page 130: ...rement G 3 3 Fault loop impedance and prospective fault current Fault loop is a loop comprising mains source line wiring and PE return path to the mains source The instrument has ability to measure impedance of mentioned loop and calculate short circuit current and contact voltage regarding the selected circuit breaker type The measurement is covered by requirements of the EN 61557 3 standard See ...

Page 131: ...ive part of loop impedance Prospective fault current ISC is calculated from measured impedance as follows Z k Un I SC SC where Un Nominal UL PE voltage see table below ksc Correction factor for Isc see chapter 4 4 2 Un Input voltage L PE 110 V 93 V UL PE 134 V 230 V 185 V UL PE 266 V Notes High fluctuations of mains voltage influence the measurement results The noise sign is displayed in the messa...

Page 132: ...I Rated current of fuse 6 A 10 A 16 A 20 A 25 A Z_lim Maximum line impedance for selected fuse Means no fuse selected Circuit for measurement of line impedance L1 L2 L3 N PE RE Ro L PE N L L1 N L2 PE L3 N L2 L L1 PE L3 Figure G 12 Phase neutral or phase phase line resistance measurement connection of plug commander and universal test cable Line impedance measurement procedure Select the Z LINE fun...

Page 133: ...ulated as follows Z k Un I SC SC where Un Nominal L N or L1 L2 voltage see table below ksc Correction factor for Isc see chapter 4 4 2 Un Input voltage range L N or L1 L2 110 V 93 V UL N 134 V 230 V 185 V UL N 266 V 400 V 321 V UL L 485 V Note High fluctuations of mains voltage can influence the measurement results The noise sign is displayed in the message field in this case Repeat the measuremen...

Page 134: ...est for active keys Figure H 1 Fault loop impedance Test parameters for fault loop impedance measurement TEST Selection the type of fault loop measurement Sikring RCD Rs RCD Sikring or RCD selected Fuse type Selection of fuse type NV gG B C K D Fuse I Rated current of selected fuse Fuse T Maximum breaking time of selected fuse Isc_lim Minimum short circuit current for selected fuse combination Rs ...

Page 135: ...procedure Select the Z LOOP function Select test parameters optional Connect test cable to the EurotestAT Connect test leads to the tested object see figure H 2 Press the TEST key After the measurement is finished store the result optional Figure H 3 Examples of loop impedance measurement results Displayed results Z Fault loop impedance ISC Prospective fault current R Resistive part of loop impeda...

Page 136: ...UL PE 134 V 230 V 185 V UL PE 266 V Notes High fluctuations of mains voltage influence the measurement results The noise sign is displayed in the message field in such case Repeat the measurement Isc is not calculated in case the terminal voltage monitor does not detect voltage state that corresponds to the selected supply system indication This measurement will trip out RCD in RCD protected elect...

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