Kyoritsu Electrical Instruments Works KEW 4140 Instruction Manual
  1. Manuals
  2. Brands
  3. Kyoritsu Electrical Instruments Works Manuals
  4. Test Equipment
  5. KEW 4140
  6. Instruction manual

Kyoritsu Electrical Instruments Works KEW 4140 Instruction Manual

Digital loop/pfc/psc tester
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
INSTRUCTION MANUAL
DIGITAL LOOP/PFC/PSC TESTER
ＫＥＷ 4140

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the KEW 4140 and is the answer not in the manual?

Questions and answers

Related Manuals for Kyoritsu Electrical Instruments Works KEW 4140

Summary of Contents for Kyoritsu Electrical Instruments Works KEW 4140

  • Page 1 INSTRUCTION MANUAL DIGITAL LOOP/PFC/PSC TESTER ＫＥＷ 4140...

  • Page 2: Table Of Contents

    CONTENTS 1. Safe Testing  ･･･････････････････････････････････････････ 1 2. Instruments Layout ･･････････････････････････････････････ 4 3. Accessories ････････････････････････････････････････････ 7 4. Features ･･･････････････････････････････････････････････ 8 5. Specification･ ･･････････････････････････････････････････ 9     5.1 Measurement Specification ･･････････････････････････ 9     5.2 Operating Error ････････････････････････････････････10     5.3 General Specification  ･･････････････････････････････11     5.4 Applied Standards  ･････････････････････････････････11 6. Preparation for Measurement  ･ ･･･････････････････････････12 7. LOOP/PSC/PFC Test  ･････････････････････････････････13     7.1   P rinciples of Measurement of Fault Loop Impedance and PFC  ･13     7.2   P rinciples of Measurement of Line Impedance and PSC ･17     7.3   O perating Instructions for LOOP and PSC/PFC ･･･････18     7.3.1 Initial Checks･ ･･･････････････････････････････････18     7.3.2 Measurement Of LOOP And PSC/PFC  ･････････････19     7.3.3 Contents on Sub Display  ･ ･････････････････････････20 8. Phase Rotation Test ...

  • Page 3: Safe Testing

    1. Safe Testing # WARNING ● R ead through and understand instructions contained in this manualbeforestartingusingtheinstrument. ● S ave and keep the manual handy to enable quick reference whenevernecessary. ●Theinstrumentistobeusedonlyinitsintendedapplications. ● U nderstandandfollowallthesafetyinstructionscontainedinthe manual. Failure to follow the instructions may cause injury, instrument damage and/or damage to equipment under test. Kyoritsu is by no means liable for any damage resulting from the instrument in contradictiontothiscautionarynote.
  • Page 4 ● F or safety reasons only use accessories (test leads, probes, cases, etc) designed to be used with this instrument and recommended by KYORITSU. The use of other accessories is prohibitedastheyareunlikelytohavethecorrectsafetyfeatures. ● N ever open the battery compartment cover when making measurement.
  • Page 5 ● D uring testing it is possible that there may be a momentary degradation of the reading due to the presence of excessive transients or discharges on the electrical system under test. Should this be observed, the test must be repeated to obtain a correctreading.Ifindoubt,contactyourdistributor.

  • Page 6: Instruments Layout

    2. Instrument Layout 1.FrontView ④ ⑥ ⑤ ① ⑦ ⑧ ⑨ ② ⑩ ③ Fig.2-1 Name Operation ① Display(LCD) ② TestSwitch Startmeasurements. ③ BackLightSwitch Switches on/off the Back light of theDisplay(LCD) ④ L-PEATTONSwitch Select“L-PEATTON”function ⑤ L-PEATTOFFSwitch Select“L-PEATTOFF”function ⑥ L-N/L-LSwitch Select“L-N/L-L”Function ⑦...
  • Page 7 2.InputTerminal ① ② Fig.2-2 ① TerminalNamesfor: L:Line LOOP,VOLTS PE:ProtectiveEarth N:Neutral(forLOOP) ② TerminalNamefor L1:Line1 PHASEROTATION L2:Line2 L3:Line3 Sub Display 3.LCD Main Display Fig.2-3 ̶  5  ̶...
  • Page 8 List of Display Message Batterysymbol Displayed when the measured values exceed the displayablerange. (over-range) e.g.Thedisplayshows“>1999Ω”ataLOOPtestwhen atestresultexceeds1999Ω. Displayed when “L-PEATT ON” function is selected to indicateATTison. The LCD indicates “L-PE” when “L-PEATT ON” or “ATT OFF” is selected and “L-N/L-L” when “L-N/L-L” is selected.

  • Page 9: Accessories

    3. Accessories 1.MainTestLead(Model7218) Fig.3-1 2.DistributionBoardTestLead(Model7246) Fig.3-2 Protectivefingerguard It is a part providing protection against electrical shock and ensuringtheminimumrequiredairandcreepagedistances. Whentheinstrumentandthetestleadarecombinedandusedtogether, whicheverlowercategoryeitherofthembelongstowillbeapplied. 3.SoftCaseModel9156A…x1 4.StrapBeltModel9155……x1 5.Battery…x6 ̶  7  ̶...

  • Page 10: Features

    4. Features The KEW4140 LOOP/PFC/PSC tester performs three function in oneinstrument. 1Loopimpedancetester 2Voltagetester 3Phaserotationtester TheKEW4140havethefollowingfeatures: ATT(AntiTripTechnology) ATT enables a measurement without tripping the RCDs with the rated residualcurrentof30mAormore. Wiringcheck Three Wiring symbols indicate if the wiring of the circuit under test is correct.

  • Page 11: Specification

    5. Specification 5.1 Measurement Specification LoopImpedance RatedVoltage NominalTestCurrent Function Range at0ΩExternalLoop: Accuracy GuaranteedVoltage (OperatingVoltage) (Auto-Ranging) Magnitude/Duration Range ( ＊ 1) L-PE: 230V(50 ／ 60Hz) L-PELOOP: 20Ω: 20Ω:0.00-19.99Ω 6A/20ms ATTOFF 200Ω:20.0-199.9Ω 200Ω: ±(3%rdg+4dgt) (100 〜 280 Ｖ ) 2000Ω:200-1999Ω 2.3A/20ms ( ＊ 2) (45 〜...

  • Page 12: Operating Error ････････････････････････････････････10

    PHASEROTATION Rated Remarks Voltage 50 〜 500V Correctphasesequence:displayed“1.2.3”and mark 45~65Hz Reversedphasesequence:displayed“3.2.1”and mark Volts Guaranteed  Range Display Range Accuracy Voltage Range Volt：0 〜 525V 25 〜 500Vrms Volt：±(2%rdg+4dgt) 500V Frequency：40.0 〜 70.0Hz 45 〜 65Hz Frequency：±(0.5%rdg+2dgt) Possiblenumberoftestswithfreshalkalinebatteries. LOOP/PFC/PSC  :Approx.3000timesmin(ATT) VOLT/PHASEROTATION :Approx.100H. 5.2 Operating error LoopImpedance(EN61557-3) FUNCTION Operatingrangecompliant...

  • Page 13: General Specification  ･･････････････････････････････11

    5.3 General specification Instrument dimensions 84X184X133mm Instrument weight:- 860g(includingbatteries.) Reference conditions Specifications are based on the following conditionsexceptwhereotherwisestated:- 1.Ambienttemperature:23±5°C: 2.Relativehumidity45%to75% 3.Position:horizontal 4.ACpowersource230V,50Hz 5.DCpowersource:9.0V 6.Altitudeupto2000m,Indooruse Battery type Six1.5VAAbatteries U s e  o f  a l k a l i n e  b a t t e r i e s  ( L R 6 )  i s recommended.

  • Page 14: Preparation For Measurement  ･ ･･･････････････････････････12

    6. Preparation for Measurement CheckofBatteryvoltage (1)See“12.Batteryreplacement”andinstallbatteriesinKEW4140. (2) P ressthePowerswitchonKEW4140foratleast1sectopower ontheinstrument. * P owerswitchisactivatedonlywhentheswitchispressedfor1 secormore. Presstheswitchforatleast1sectopowerofftheinstrument. (3) P ower on KEW4140 and check the Battery symbol displayed at the upper left on the LCD. When the displayed battery level is lowest ( ), the installed batteries will be exhausted soon. Replacethebatterieswithreferenceto“12.Batteryreplacement” tocontinuefurthertests.

  • Page 15: Loop/Psc/Pfc Test  ･････････････････････････････････13

    7. LOOP/ PSC/PFC Test 7.1 Principles of measurement of fault loop impedance and PFC If an electrical installation is protected by over-current protective devices including circuit breakers or fuses, the earth loop impedanceshouldbemeasured. In the event of a fault the earth fault loop impedance should be low enough (and the prospective fault current high enough) to allowautomaticdisconnectionoftheelectricalsupplybythecircuit protection device within a prescribed time interval. Every circuit...
  • Page 16 AccordingtotheInternationalStandardIEC60364,forTTsystems thecharacteristicsoftheprotectivedeviceandthecircuitresistance shallfulfillthefollowingrequirements: Ra x Ia ≤ 50V Where: RaisthesumoftheresistancesinΩofthelocalearthsystemand theprotectiveconductorfortheexposedconductiveparts. 50 is the maximum safety touch voltage limit (it can be 25V in particularcaseslikeconstructionsites,agriculturalpremises,etc.). Ia is the current causing the automatic disconnection of the protectivedevicewithinthemaximumdisconnectingtimesrequired byIEC60364-41: 　 -200msforfinalcircuitsnotexceeding32A(at230/400VAC) 　 - 1 000 ms for distribution circuits and circuits over 32A (at 230 / 400VAC) Thecompliancewiththeaboverulesshallbeverifiedby: 1)   M easurement of the resistance Ra of the local earth system by...
  • Page 17 Forthisexamplethemaxpermissiblevalueis1667Ω(RCD=30mA and contact voltage limit of 50 V). The instruments reads 12.74Ω, thus the condition RA ≤ 50/Ia is respected. However, considering that the RCD is essential for protection, it must be tested (Please refertoRCDTESTSsection). TN System For TN systems the earth fault loop impedance is the sum of the followingimpedances.
  • Page 18 　 -400msforfinalcircuitsnotexceeding32A(at230/400VAC) 　 -5sfordistributioncircuitsandcircuitsover32A(at230/400VAC) Thecompliancewiththeaboverulesshallbeverifiedby: 1)MeasurementofthefaultloopimpedanceZsbyLooptester. 2) V erification of the characteristics and/or the effectiveness of the associatedprotectivedevice.Thisverificationshallbemade: - f orcircuit-breakersandfuses,byvisualinspection(i.e.shorttime orinstantaneoustrippingsettingforcircuit-breakers,currentrating andtypeforfuses); - f or RCDs, by visual inspection and test using RCD testers recommendingthatthedisconnectingtimesmentionedaboveare met(PleaseseeRCDTESTsection). ForinstanceinaTNsystemwithnominalmainsvoltageUo=230 V protected by General purpose gG fuses or MCBs (Miniature CurrentBreakers)requiredbyIEC898/EN60898,theIaandmax Zsvaluescouldbe: ProtectionbygGfuses...

  • Page 19: P Rinciples Of Measurement Of Line Impedance And Psc ･17

    Fig.7-4 MaxvalueofZsforthisexampleis1.44Ω(MCB16A,characteristic C),theInstrumentreads1.14Ω(or202AonFaultcurrentrange)it meansthattheConditionZsxIa≤Uoisrespected. InfacttheZsof1.14Ωislessthan1.44Ω(ortheFaultcurrentof 202AismorethanIaof160A). Inotherwords,incaseoffaultbetweenphaseandearth,thewall socket tested in This example is protected because the MCB will tripwithinthedisconnectiontimerequired. 7.2 Principles of the measurement of line impedance and PSC The method for measuring Line – neutral impedance and line-line impedance is exactly the same as for earth fault loop impedance measurement with the exception that the measurement is carried outbetweenlineandneutralorlineandline.

  • Page 20: O Perating Instructions For Loop And Psc/Pfc ･･･････18

    　　　　　　 Fig.7-5 7.3. Operating instructions for LOOP and PSC/PFC 7.3.1 Initial Checks: to be carried out before any testing 1. Preparation  A lways inspect your test instrument and lead accessories for abnormality or damage: If abnormal conditions exist DO NOT PROCEED WITH TESTING. Have the instrument checked by yourdistributor.

  • Page 21: Measurement Of Loop And Psc/Pfc  ･････････････19

    or symbol is indicated on the LCD, DO NOT PROCEEDAS THEREISINCORRECTWIRING.Thecauseofthefaultmustbe investigatedandrectified. 3. Voltage Measurement  W hen the instrument is first connected to the system, it will display the line-earth Voltage (L-PEATT ON /ATT OFF) or line- neutralvoltage(L-N/L-L)whichisupdatedevery1s.Ifthisvoltage isnotnormalorasexpected,DONOTPROCEED. 7.3.2 Measurement of LOOP and PSC/PFC a.
  • Page 22 7.3.3 Contents displayed on Sub Display  L OOP test results are displayed as illustrated below. Results displayed on the LCD are dependent on the selected function. Pressthe“DISP”Switchtotogglethetestresultsdisplayedonthe SubDisplay. Sub Display Fig.7-7 Main Display ContentsdisplayedonSubDisplay Contents Function displayedonSub Displayaftertests ⇨ ⇨...
  • Page 23 ● M easured result may be influenced depending on the phase angleofthedistributionsystemwhenmakingmeasurementnear atransformerandtheresultmaylowerthantheactualimpedance value.Errorsinmeasuredresultareasfollows. SystemPhase Error Difference (approx.) 10° -1.5% 20° 30° -13% Fig.7-8ConnectionforusingOutlet Fig.7-9Connectionfordistribution ̶  21  ̶...
  • Page 24 Fig.7-10ConnectionforLine–Neutralmeasurement Fig.7-11ConnectionforLine–Linemeasurement ̶  22  ̶...

  • Page 25: Phase Rotation Test  ･･･････････････････････････････････23

    8. Phase Rotation Tests 1. O peratethePowerswitchandturnontheinstrument.Pressthe PHASEROTATIONfunctionswitch. 2.InserttheTestLeadsintotheinstrument.(Fig.8-1) 　　　　　　　　　　　　　　　　 Fig.8-1 3.Connecteachtestleadstoacircuit.(Fig.8-2) 　　　　　　　　　　　　　　　　　　　 Fig8-2 4.Resultsaredisplayedasfollows. CorrectphasesequenceReversedphasesequence Fig.8-3 　　　　　　　 Fig.8-4 ●Whenamessage“no”or“---”isdisplayed,thecircuitmay  n ot be a 3-phase system or a wrong connection may have been made.Checkthecircuitandtheconnection. ● P resence of Harmonics in measurement voltages, such as an inverterpowersupply,mayinfluencethemeasuredresults.

  • Page 26: Volts  ･････････････････････････････････････････････････24

    9. Volts 1. O peratethePowerswitchandturnontheinstrument.Pressthe VOLTSfunctionswitch. 2.InserttheTestLeadsintotheinstrument.(Fig.9-1) Fig.9-1 3. V oltagevalueandfrequencywillbedisplayedontheLCDwhen applyingACvoltage. Frequency Voltage Fig.9-2 10. Back Light Pressing the Back Light Switch selects Backlight ON / OFF. Backlightautomaticallyturnsoffin2minutesafteritturnson. 11. Auto-Test The Test Switch is locked when the switch is pressed down for 3 sec.TheredLEDontheswitchwillflash.Inthisautomode,when using distribution board lead Model 7246, tests are conducted by simply disconnecting and reconnecting the red phase prod of the...

  • Page 27: Battery Replacement  ･･････････････････････････････････25

    12. Battery Replacement # DANGER ● N ever open the battery compartment cover while making measurement.Toavoidpossibleelectricalshock,disconnectthe testprobebeforeopeningthecoverforbatteryreplacement. # CAUTION ●Installbatteriesincorrectpolarityasmarkedinside. ● D onotmixbatteriesofdifferenttypesornewbatterieswithused ones. Whenthedisplayshowsthelowbatteryindication, ,disconnect thetestleadsFromtheinstrument.Removethebatterycoverand the batteries. Replace with six (6) new 1.5VAA batteries, taking caretoobservecorrectpolarity.Replacethebatterycover. Batterytype:six(6)1.5VAAbatteries (Useofalkalinebatteries(LR6)isrecommended.) Fig.12-1 ̶...

  • Page 28: Servicing ････････････････････････････････････････････26

    13. Servicing If this tester should fail to operate correctly, return it to your distributorstatingtheexactnatureofthefault.Beforereturningthe instrumentensurethat:- 1.Thebatteriesareingoodcondition. Please remember to give all the information possible concerning the nature of the fault, as this will mean that the instrument will be serviced and returned to you more quickly. ̶...

  • Page 29: Case And Strap Assembly ･････････････････････････････27

    14.Case and Strap Assembly 14-1HowtofastentheStrapbelt (1) P ass the Side Belt through t h e B u c k l e a s s h o w n i n Fig.14-1.(2pcs) (2) A ttach the Side Belt to Buckle the instrument as shown inFig.14-2.(bothsides) Side Belt Fig.14-1...
  • Page 30 14-2HowtostoreinSoftCase Follow the procedure (1) and (2) as illustrated below to store the instrumentintheSoftCase. Instrument Partition Soft Case Fig14-4 (1) P asstheBeltattachedtotheinstrumentthroughtheslotonthe SoftCaseandstoretheinstrumentintheSoftCase. (2) P ut a partition to be adjacent to the bottom face of the instrument.(Storethetestleadsinthepartition.) Complete Test Lead Strap belt Tie up the test Cord belt leads with the...
  • Page 31 MEMO...
  • Page 32 DISTRIBUTOR Kyoritsu  reserves  the  rights  to  change  specifications  or  designs  described in this manual without notice and without obligations. 8-19 92-2019C...

Table of Contents