Kewtech KTD40 - Specifications; Wiring Test Specifications; Loop Test Specifications; Measurement Range and Accuracy

10
11
Loop-PFC/PSC Testing - continued
WhenusingHANDSFREEmodewiththedistributionboardtestleadsetalways
connecttheEarthandNeutralpolesbeforetheLine,otherwiseitwillindicatea
polarityfaultandinhibitfurthertesting.
HANDSFREE testing in No-trip mode.
The tester will automatically conduct the socket wiring test upon connection to the
Livesupply.IfalliswellitwillimmediatelyinitiateaLooptest.
Whenthetestiscompletetheresultwillbedisplayedforafewsecondsbeforethe
displayrevertstoshowingtheL-Nvoltage.
TheLooptestresultcanberecalledbypressingtheNo-tripbuttonandthePFC/
PSCresultcanberecalledbypressingtheNo-tripPFCbutton.
7 NO TRIP PFC HavingcarriedoutaNo-tripEarthfaultlooptest–pressingthis
buttoncalculatesthePFC(ProspectiveFaultCurrent)bydividingthemeasuredloop
resultintothemeasuredL-Evoltage.
8 VOLTAGE ThedefaultvoltagemeasurementismadebetweenL-N.Usingthis
buttonyoucanoverridetomeasureL-Eandasanalsafetycheckmeasurethe
N-Evoltagepresent.
9 Ze/DB ThisbuttonselectstheHighCurrentTrueLoopImpedancemode.Useonly
withthetestleadsetconguredfor2-wiremode(seepage6).
 Connectthetestleadstothetwoconductorsbeingtested.Thesupplyvoltage
(seestep8)willbedisplayed.AbriefpressofthetestbuttonwillconducttheLoop
testandtheresultwillbedisplayedalmostimmediately.
Note: In2-wiremodethevoltagedisplayedwillbethatmeasuredacrossthe2
conductorsthatthetestleadsareconnectedto.ThedisplaywillshowthisasL-N
regardlessofwhethertheyareconnectedacrossL-NorL-E.
HANDSFREE testing in High current 2-wire mode.
Thisfunctionisparticularlyusefulfortestingatdistributionboardsandisactivated
bypressingthetestbuttonbeforeconnectingtothemainssupply.TheKTD40
willthenautomaticallyconductaLooptestuponconnectiontothelivesupply
anddisplaytheresult.ThesupplyvoltagecanberecalledbypressingtheVoltage
buttonandthePFC/PSCresultcanberecalledbypressingtheNo-tripPFCbutton.
10 PFC/PSC ProspectiveFaultCurrent/ProspectiveShortCircuitCurrent.Pushing
thisbuttondividestheaboveTLI(TrueLoopImpedance)resultintothevoltage
measuredbetweenthetwopointsundertesttogiveeithertheprospectiveshort-
circuitcurrent(whenL-Nistested)ortheprospectiveearthfaultcurrent(whenL-E
istested).
Specifications
Wiring Test
DetectsmissingEorN(>15kΩ)
DetectsL-EorL-Nswap
DetectsLive–Earth/NeutralreversalbyuseofPolarityTestPad
Phase–Neutralvoltagemeasurement ±1%±1V
Phase–Earthvoltagemeasurement ±1%±1V
Neutral–Earthvoltagemeasurement ±1%±1V
Loop Test
Notripmode3wiretestingPhase–Neutral–Earthallconnected
Testcurrent<15mAat253VAC
Range Accuracy
0.00to9.99Ω ±5%±5digits
10.00to99.9Ω ±3%±3digits
100.00to500Ω ±3%±3digits
Highcurrentmode2wiretestingPhase-NeutralorPhase-Earthconnectedusingtrue
impedancemeasurement–autotest(handsfree)isselectable.
Range Accuracy
0.00to9.99Ω ±3%±3digits
PFC/PSC Measurement
10A–19.9kA Thisisacalculatedresultusingthelooptestmeasurementbut
  itwillbeinherentlymoreaccuratethantraditionalmethodsas
the test is of impedance not solely resistance.
Over Voltage Protection
440VAC  Nodamage–completerecovery
Power
4×AAbatteries(notincluded)
Batterylife(BSEN61557)>10,000test(orshelflifeofbatteriesinstalled)
Environmental
OperatingTemperatureRange 0°Cto40°C
StorageTemperatureRange –10°Cto+60°C
OperatingHumidity 93%RH@40°C
Size 157mm×89mm×39mm
Weight 400g