APPLICATIONS AND SOLUTIONS FOR TESTING AND ANALYSIS OF:

Equipotential bonding and Connectivity Step and Contact Voltages Earth Resistance and Earthing Sistems Impedances and Fault Currents Conditions for Automatic Disconnection Switchboards, Machines and Appliances Power Quality HV Insulation

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1

EQUIPOTENTIAL BONDING AND CONNECTIVITY TESTINGMI 3252 MicroOhm 100A

TESTING OF LARGE EARTHING SYSTEMSMI 3295 Step Contact Voltage Measuring System

The equipotential bonding and connectivity of bigger cross section conductors, parallel connected bars and metal stripes is hard to prove without a powerful, accurate and precise measuring system. The MI 3252 MicroOhm 100A is just what is needed to show reliable and stable results in fine resolution of 1 nanoOhm.

TheMI3252MicroOhm100Aisportablelowresistanceohmmeterusedtomeasurelowcontactresistanceofcircuitbreakers,switchesandbusbarjointsusingtestcurrentfrom100mAupto100A.A4-leadKelvintestmethodisutilizedtoeliminatetestleadresistanceandprovideextremelyac-curatereadings(0.25%).Theinstrumentcanbepoweredfrommainssupplyorinternalbattery.PCSWHVLinkPROsuppliedasastandardaccessoryenablesdownloading,analysisandexportoftestresultsandprintingoftestreports.

MEASURING FUNCTIONS:• Resistancemeasurementwithadjustabletestcurrent

(100mA…100A);• Voltagedropmeasurement.

APPLICATION:Resistance measurement of: • High,middleandlowvoltagecircuitbreakers;• High,middleandlowvoltagedisconnectingswitches;• Highcurrentbusbarjoints;• Cablesplices;• Weldingjoints.

The measurement of earth resistance, soil resistivity and the analysis of voltage drop around objects such as earthing systems, antenna towers, HV towers, industrial platforms, transformers, generators, PV systems etc. is necessary to ensure the safety in the surrounding area should the object become dangerous in the event of a earthing fault or lightning strike.

The MI 3295 Step/Contact Voltage Measuring System is one of the smallest all in one solutions, with a powerful generator (up to 55 A) and special technology to eliminate the earth noise current (even in low power operating mode (in the range of mA)). The MI 3295 Step Contact Voltage Measuring System is extremely safe and utilizes a SELV voltage of only 55 V to perform its tests, reducing the risk of injury to people or livestock when performing tests in public or in areas containing livestock. All test results can be interpreted and recalculated online at the test site to simulate a live to earth fault or lightning strike.

TheMI3295StepContactVoltageMeasuringSystemisavoltagemeas-uringsystemintendedfortestingandverificationofprotectiveearthingof power stations, substation and other power systems. The systemconsistsofastationforgeneratingcurrentandanautonomousvoltageMeter(removingtheneedforlongtestleads).Duetohightestcurrent(upto55A)andeffectivenoisecancellation,theMI3295producesveryaccurateandstablemeasurementsofStepandContact Voltages with the resolution down to 10 μV. Multiple voltme-terscanbeusedsimultaneouslyforfasteranalysisofvoltagedistributionaroundthetestedobject.Alltestresultsandparameterscanbesavedintotheinstrument’smemoryforfurtherreference,downloading,analy-sisandtestreportprintingwiththehelpofthePCSWHVLinkPRO.

MEASURING FUNCTIONS:• Stepvoltage;• Contactvoltage;• Earthresistance.

APPLICATION:Measurement of protective earthing of: • Powerstations;• Substations;• Distributiontowers;• Otherpowersystems.

2

LIVE IMPEDANCE AND FAULT CURRENT TESTING, EVALUATION OF CONDITIONS FOR AUTOMATIC DISCONNECTION A 1143 Euro Z 290 A

TESTING THE SAFETY OF SWITCHBOARDS, MACHINES AND PORTABLE APPLIANCES MI 3321 MultiServicerXA

The safe and efficient running of an electrical system relies on good connectivity between conductors, joints, busbars, switches and compo-nents on the way from the power source to the load. Loop impedance testing is one of the best options for finding the cause of losses, high voltage drops, faults on live circuits and bad contacts.

The term “safety management” summarizes all necessary steps that must be taken to assure the safety of electrical equipment through its complete lifetime. The primary goal is to ensure that the equipment is safe to use and to avoid hazardous situations that can cause electric shock, fire and explosion.

Many different loads, switchgear, control gear, machines, motors, extension leads, tools or appliances could be connected to the power system. The MI 3321 MultiservicerXA tester is an all in one testing solution with built in fast autotest solution to ensure the safety of all the parts that require safety testing.

TheMI3321MultiServicerXAmultifunctionalportabletestinstrumentisintendedtoperformallnecessarymeasurementsfortestingtheelec-tricalsafetyofportableelectricalequipment,machinesandswitchgears.Itisthefirstmachinetestercoveringallnecessarytestsaccordingto

TheA1143EuroZ290Aisaprofessionalportablehighcurrentimped-ance tester. It performs high precision line and fault loop impedancemeasurementsinenvironmentsuptoCATIV/300V.Itisusedtotestpower transformers andmotorwindings.Themainusers aremainte-nanceengineersinpowerutilities.Theinstrumentisdesignedtoworkindependentlyor inconjunctionwith theMI2086Eurotest61557,MI3101EurotestAT,MI3105EurotestXAandMI3321MultiServicerXA.

MEASURING FUNCTIONS:• Highprecisionlineimpedance;• Highprecisionfaultloopimpedance;• Contactvoltage.

APPLICATION:• Highaccuracyloopandlinemeasurements;• Powertransformerandmotorwindingmeasurement.

newIEC/EN60204ed.5includingLoopimpedance,RCDandHVtests.

MultiServicerXAenablesmeasurementofdischargetime,powerandcurrentconsumptionandresistancetoexcessivevoltageswhicharethemainparametersinthesafetytestingofhardwiredappliancesandlargemachinery.Withasimpleuser interface, largegraphicLCD,QWERTYkeyboard,helpmenuswithconnectiondiagramsandextraportsfortest-ingfixedinstallationstheMI3321isthebestsolutionforsafetytesting.

MEASURING FUNCTIONS:• Continuitytests(200mA,10A);• Insulationresistance;• Substituteleakage;• Differentialleakagecurrent;• Touchleakagecurrent;• IECcordpolaritytest;• LeakageandTRMSloadcurrentswithcurrentclamp;• PortableRCDtest;• RCDtest;• Functionaltest.

APPLICATION:• Factorymachinerysafetytesting;• Industrialsafetytesting;• Portableappliancessafetytesting;• Switchgearsafetytesting.

3

POWER QUALITY ANALYSING, RECORDING AND TROUBLESHOOTING MI 2792 PowerQ4 Plus

HV INSULATION ANALYSIS MI 3200 TeraOhm 10 kVCharacteristics of insulation tend to change through the time, normally getting worse through ageing. Various physical phenomena (like temperature, dirt, humidity, mechanical and electrical stresses, high-energy radiation, etc) have a big influence on insulation characteristics.

Safety, operability, and reliability are the most important parameters of an electrical device or system containing insulation and this is the rea-son why insulation must be measured. Insulation is measured in the production phase of electrical device and also later, during maintenance works or repair.

ThenewinsulationtesterMI3202TeraOhm10kVisaportableinstrumentintendedtomeasureinsulationresistancebyusinghighDCtestvoltagesupto10kV.TheTeraOhm10kVenablesinsulationresistancemeasurementsupto10TΩ,stepvoltagetest,withstandingvoltagetest,PI,DDandDARcalculationandcapacitancemeasurement.

Regardless of the definition used, power quality is a major strategic issue in the open electricity market economy. There are several reasons to encourage a systematic and constant approach to the monitoring of the power quality parameters, these include: • Easy identification and elimination of problems on the utilities or customer’s installation.• Preventative maintenance by the early location of potential sources of disturbances or failures.• Optimization of the power network based on Power Quality parameters.

TheMI2792PowerQ4Plusisapowerqualityanalyzerspeciallydesignedforthetroubleshootingofpowersystemsanddevices.Keyfeaturesincludearug-geddesign,longbatterypoweredoperationtime(upto15hours),powerfulrecorders,eventsandalarmsfacility,flexcurrentclampsasastandardaccessory,remoteinstrumentcontrolviaoptionalGPRSmodemandtheabilitytosynchronizeinstrumentsviaGPSmakethisinstrumentauniquetroubleshootingtool.

ThelargeLCDscreenenablesreal-timegraphR(t)tobedisplayed.Re-sultscanbestoredanddownloaded toacomputerviaUSBorRS232connectionwiththehelpoftheoptionalHVLinkPROsoftware.Thehighquality instrument,shieldedtest leadsandqualityaccessoriesincludedin thestandardsetenable insulation testing tobeperformquicklyandeffectively.

MEASURING FUNCTIONS:• Insulationresistancemeasurement;• Stepvoltageinsulationresistancetesting;• Withstandingvoltagetesting;• Diagnostictest(PI,DD,DAR);• R(t)graphplotting;• Capacitancemeasurement;• Voltagemeasurement;• Frequencymeasurement.

APPLICATION:• Testinginsulationresistanceofrotatingmachinery,cables,

transformers,HVgenerators,surgearresters;• Productionlineperiodictestingandmaintenance;

ALTERNATIVE:• MI3201TeraOhm5kVPlus

AdvancedPCSWpackagePowerView2enablesdetailedanalysisofrecord-eddataandtheautomaticcreationofprofessionaltestreports.Anexcel-lentprice/performanceratio,smallsize,advancedmeasurementmethodsandloggersareundoubtedthehighlightsoftheMI2792PowerQ4Plus.

MEASURING FUNCTIONS:• Voltage:TRMS,peak,crestfactor(4-channel);• Current:TRMS,peak,crestfactor(4-channel);• Power(active,reactive,apparent);• Powerfactor,cosϕ;• Unbalance,flickermeasurement;• Harmonicanalysisuptothe50thharmonics,THDmeasurement;• Energy(active,reactive,generated,consumed);• Capturingandrecordingofpowersupplyevents(interruptions,swells,dips);• Inrushcurrentsmonitoringandrecording;• Recordingwithupto10adjustablealarms;• Waveformplottingandsnapshot.

APPLICATION:• Powerqualityassessmentandtroubleshootinginlowandmiddle

voltageelectricalsystems;• Checkingpowercorrectionequipmentperformance;• Harmonicsspectrumanalysisforselectionofharmonicfilters;• CheckingandtroubleshootingofUPS,voltagegeneratorsandregulators;• Voltage,current,powermonitoringandrecording;• Consumptionprofilerecording.

4

• InstrumentPowerQ4Plus• 1-phaseflexiblecurrentclamps3000/300/

30A(A1227),4pcs• Testprobe,red,2pcs• Testprobe(CATII),red,3pcs• Testprobe(CATII),black• Crocodileclip,black• Crocodileclip,green• Crocodileclip,red,3pcs• Voltagemeasurementlead,red,3pcs• Voltagemeasurementlead,black• Voltagemeasurementlead,green• Temperatureprobe• PCSWPowerView2• RS232andUSBcables• Powersupplyadapter• 1.2VNiMHrechargeablebattery,6pcs• Softcarryingbag• Instructionmanual• Calibrationcertificate

• InstrumentMI3295M&MI3295S• Mainscable• Stepvoltageprobe(25kg),2pcs• Currentearthspike• Potentialearthspike• Currenttestlead,50m,black,10mm2,

withcrocodileclip,onwheel• Currenttestlead,10m,black,10mm2,

withcrocodileclip• Testlead,black,2x3m• Testlead,green,10m• Testlead,black,1.5m• Testlead,red,50m• Connectionleadwithcrocodileclip,red,1m• Crocodileclip,4pcs• RS232cable• USBcable• Softcarryingbag,2pcs• Softcarryingneckbelt• NiMHbatterycells,typeAA,6pcs• Powersupplyadapter• CDwithinstructionmanualandPCSW

HVLinkPRO• Instructionmanual• Calibrationcertificate

• InstrumentEuroZ290A• Testlead,2-wire,2pcs• Testlead,black,2m• Testprobe,red,2pcs• Crocodileclip,black,3pcs• Crocodileclip,red,2pcs• RS232cable• RS232-PS/2cable• Instructionmanual• Calibrationcertificate

• InstrumentTeraOhm10kV• Mainscable• 10kVshieldedtestleadwithtip,2m• 10kVshieldedtestleadblack,2m• 10kVshieldedtestleadred,2m• 10kVcrocodileclip,2pcs(black,red)• Guardlead,green,2m• Crocodileclip,green• 6x1.2VNiMHrechargeablebatteries,typeD• Instructionmanual• HandbookonCD• Calibrationcertificate

• InstrumentMultiServicerXA• HVtestlead• Plugtestcable• 3-wiretestlead• Testlead,black,1.5m• Testlead,red,1.5m• Testlead,red,4m• Testlead,green,1.5m• Testprobe,4pcs(black,red.green,blue)• Crocodileclip,black,3pcs• Protectivebagforaccessories• PCSWPATLinkPROwithRS232andUSB

cable• Instructionmanual• Calibrationcertificate

• InstrumentMicroOhm100A• Currenttestleadwithcrocodileclip,5m,

25mm2,2pcs• Potentialtestlead,5m,2pcs(red,black)• Testprobe,2pcs(red,black)• Crocodileclip,2pcs(red,black)• Mainscable• RS232cable• USBcable• Bagforaccessories• PCSWHVLinkPRO• Instructionmanual• Calibrationcertificate

MI 3321 MultiServicerXA

MI 3252 MicroOhm 100A MI 2792 PowerQ4 Plus

MI 3295 Step Contact Voltage

A 1143 Euro Z 290 A

MI 3200 TeraOhm 10 kV

STANDARD SETS

METREL d.d.MeasuringandRegulationEquipmentManufacturerLjubljanska77,SI-1354HorjulTel:+386(0)17558200;Fax:+386(0)17549226E-mail:metrel∞metrel.si;http://www.metrel.si

METREL GmbHMetrelMess-undPrüftechnikGmbHOrchideenstraße24,90542EckentalTel.:+49912628996-0,Fax:+49912628996-20E-mail:metrel∞metrel.de,http://www.metrel.de

Metrel UK Ltd. TestandMeasuringEquipmentUnit1,HoptonHouse,RipleyDrive,Normanton,WestYorkshire,WF61QTTel.:+44(0)1924245000E-mail:info∞metrel.co.uk,http://www.metrel.co.uk

SOLUTIONS FOR TESTING _Marec_2011_Ang_Ver 1.0

Note! Photographs in this catalogue may slightly differ from the instruments at the time of delivery. Subject to technical change without notice.