AEMC 2620 Manual de usuario
GROUND FAULT/LEAKAGE
DETECTOR 2620
with the Artifical Neutral AN-1
CHAUVIN ARNOUX GROUP
®
ENGLISH User Manual
Statement of Compliance
Chauvin Arnoux®, Inc. d.b.a. AEMC®Instruments
certifies that this instrument has been calibrated
using standards and instruments traceable to
international standards.
We guarantee that at the time of shipping your
instrument has met its published specifications.
An NIST traceable certificate may be
requested at the time of purchase, or obtained
by returning the instrument to our repair and
calibration facility, for a nominal charge.
The recommended calibration interval for this
instrument is 12 months and begins on the date of
receipt by the customer. For recalibration, please
use our calibration services. Refer to our repair
and calibration section at www.aemc.com.
Serial #: ________________________________
Catalog #: 2125.52
Model #: 2620
Please fill in the appropriate date as indicated:
Date Received: _________________________________
Date Calibration Due: _______________________
Chauvin Arnoux®, Inc.
d.b.a AEMC®Instruments
www.aemc.com
Table of Contents
1. INTRODUCTION............................................................................... 3
1.1 International Electrical Symbols................................................3
1.2 DenitionofMeasurementCategories .....................................4
1.3 ReceivingYourShipment..........................................................4
1.4 OrderingInformation.................................................................4
1.4.1 AccessoriesandReplacementParts............................4
2. PRODUCT FEATURES ...................................................................... 5
2.1 Description................................................................................5
2.2 Connections..............................................................................6
3. SPECIFICATIONS............................................................................. 7
3.1 ReferenceConditions ...............................................................7
3.2 Electrical ...................................................................................7
3.3 Mechanical................................................................................8
3.4 Environmental...........................................................................9
3.5 Safety........................................................................................9
4. OPERATION .................................................................................. 10
4.1 PrincipleofOperation .............................................................10
4.1.1 MeasuringCurrentLeakage .......................................10
4.1.2 InterpretingtheMeasurement.....................................10
4.2 EquipmentTroubleshooting ....................................................11
4.3 TestingVariousCableCongurations.....................................12
4.3.1 MetalConduits............................................................12
4.3.2 GroundedNeutral .......................................................14
4.3.3 NeutralGroundedThroughanImpedance .................15
4.3.4 UngroundedSystem ...................................................15
4.4 CommonlyAskedQuestions...................................................15
5. ARTIFICIAL NEUTRAL.................................................................... 17
Warning...........................................................................................17
5.1 Description..............................................................................17
5.2 Specications..........................................................................19
5.2.1 Electrical .....................................................................19
5.2.2 Mechanical..................................................................19
5.2.3 Safety..........................................................................19
5.3 PrincipleofOperation .............................................................20
5.4 TestingUngroundedSystems.................................................21
6. MAINTENANCE ............................................................................. 22
6.1 Cleaning..................................................................................22
RepairandCalibration...........................................................................23
TechnicalandSalesAssistance ............................................................23
Limited Warranty ...................................................................................24
WarrantyRepairs...................................................................................24
GroundFault/LeakageDetectorModel2620
3
CHAPTER 1
INTRODUCTION
Warning
Thesesafetywarningsareprovidedtoensurethesafetyofperson-
nelandproperoperationoftheinstrument.
•Neverusethisclamponconductorswithavoltagepotentialabove
600Vrms.
•Neverclamparoundaconductorunlesstheclampisterminatedto
ameasuringinstrumentwithproperinputimpedance.
•Keep the jaw mating surfacesclean.Ifnecessary, use a slightly
oiledclothtoremoveoxidation.
•Ensurethatthecablesorbusbarareproperlycenteredwithinthe
clampjaws.
•Stayawayfromotherconductorswhichmaycreateinterference.
•Avoidleavingtheclampindampplacesorexposingittorunning
water.
•Duetoshockorrehazards,electricalconnectionsoftheinstrument
shouldbeperformedonlybyqualiedpersonnelandinaccordance
withlocal,state,andfederalelectricalrequirements.
1.1 International Electrical Symbols
Thissymbolsigniesthattheinstrumentisprotectedbydoubleor
reinforced insulation. Use only specied replacement parts when
servicingtheinstrument.
This symbol on the instrument indicates a WARNING and that
theoperatormustrefertotheusermanualforinstructionsbefore
operating the instrument. In this manual, the symbol preceding
instructionsindicatesthatiftheinstructionsarenotfollowed,bodily
injury,installation/sampleandproductdamagemayresult.
Risk of electric shock. The voltage at the parts marked with this
symbolmaybedangerous.
4
GroundFault/LeakageDetectorModel2620
1.2 Definition of Measurement Categories
CAT II: For measurements performed on circuits directly connected to
the electrical distribution system. Examples are measurements
onhouseholdappliancesorportabletools.
CAT III: For measurements performed in the building installation at
the distribution level such as on hardwired equipment in xed
installationandcircuitbreakers.
CAT IV: For measurements performed at the primary electrical supply
(<1000V) such as on primary overcurrent protection devices,
ripplecontrolunits,ormeters.
1.3 Receiving Your Shipment
Uponreceivingyourshipment,makesurethatthecontentsareconsistent
withthepackinglist.Notifyyourdistributorofanymissingitems.Iftheequip-
mentappearstobedamaged,leaclaimimmediatelywiththecarrierand
notifyyourdistributoratonce,givingadetaileddescriptionofanydamage.
Savethedamagedpackingcontainertosubstantiateyourclaim.
1.4 Ordering Information
Ground Fault/Leakage Detector Model 2620................... Cat. #2125.52
Includes user manual and warranty card.
1.4.1 Accessories and Replacement Parts
Adapter–4mmNon-insulatedforSafetyLeads................. Cat. #1017.45
(Converts male safety plugs to non-shielded male plugs)
ArticialNeutralModelAN-1................................................ Cat. #1971.01
Includes instrument with soft carrying case; eight 1.5 V “AA” batteries; four 5 ft (1.5 m) color-
coded leads (green, red, black, blue) and user manual.
Bag–LargeClassicToolBag .............................................Cat. #2133.71
Bag–SmallClassicToolBag............................................. Cat. #2133.72
Lead–Replacement ...........................................................Cat. #2950.29
Set of 4 Color-coded 5 ft Safety Leads (4mm straight banana plugs on both ends) for use with
the Articial Neutral Model AN-1. Rated 600V CAT IV
GroundFault/LeakageDetectorModel2620
5
CHAPTER 2
PRODUCT FEATURES
2.1 Description
TheModel2620measuresleakagecurrentshuntedtogroundcausedby
insulationbreakdownor leaks. Itenablestheoperator to locatefailures
whenorbeforetheyoccur,withoutshuttingdownequipmentorspending
hourstrouble-shooting.
It is designed specically for locating low current faults on high current
loads.ThedetectorisasensitiveACcurrenttransformercapableofmea-
suring dierential or leakage current from 500µA, and may be used to
measurecurrentupto400Acontinuousduty.
TheModel2620provides,on tworanges,1mV/mAACor1mV/AAC.The
outputleadsareterminatedwithstandard4mmbananaplugscapableof
interfacingwithanystandardmultimeter.
Useofadigitalmultimeterwithanalogbargraphisrecommended:
Digitaltoprovidethepropervoltageinputimpedance,andananalogbar
graphtotracktrends.
Whenthe2620isusedasacurrentleakagedetector,itmakesnodierence
ifthesystemissingle-phaseorpoly-phase,orifthecurrentsarein-phase
oroutofphase,balancedorunbalanced.
Thenetmagneticeldatanyinstantintimewillbezeroifalltheconductors
surroundedbythecurrentleakagedetectoraresupplyingallthecurrent
deliveredtoandreceivedfromtheload.
Ifany currentisdiverted throughanyalternate pathtoground, suchas
aninsulationbreakdown,thenetlosswillbedetectedproducingaoutput
proportionaltotheamplitudeofthefaultcurrent.
TheModel2620mayalsobeusedsimplyasahighlyaccurateclamp-on
currentprobe.Withits4"jawopeningandrangeof500µAto400A,the2620
providesaversatile way toanalyzeunbalancedcurrent measurements,
leakagevaluesongroundingconductorsandgroundloopcurrents.
6
GroundFault/LeakageDetectorModel2620
2.2 Connections
The Model 2620 is compatible with most DMMs, voltmeters, or other
voltagemeasuringinstrumentswiththefollowingfeatures:
• Rangeandresolutioncapableofdisplaying1mVACofinput.
• Voltmeteraccuracyof0.75%orbettertotakefulladvantageofthe
accuracyoftheprobe.
• Minimuminputimpedanceof1MΩ.
Connecttheprobetothemultimeterorotherinstrument.
SelecttheappropriateACvoltagerangeonyourmultimeter.
TheModel2620hastwoselectableoutputranges.The4Arangewillpro-
duceamV/mAwithanoutputof4VACat4A.The400Arangeproduces
1mV/Awith400mVAC at 400A.
Warning: User Safety
Always use a DMM, voltmeter or other displaying device, appropriately
ratedfortheworkingvoltageandforsafety.
GroundFault/LeakageDetectorModel2620
7
CHAPTER 3
SPECIFICATIONS
3.1 Reference Conditions
Ambient temperature: 23°C ± 3K
Relative humidity: 20to75%RH
Position of the conductor: Centeredinthejaws
Current frequency and form: Sinusoidal50/60Hz±0.2Hz,distortion<1%
Superimposed DC current: NoDCcurrent
Continuous magnetic eld: Eartheld<40A/m
Alternating magnetic eld: Noexternalalternatingmagneticeld
Proximity of external conductors: None
Measuring device’s impedance: ≥10MΩ/100pF
3.2 Electrical
4A Range
Nominal Current: 4AAC
Measurement Range: 0.5mA to 4AAC
Output Signal: 1mVAC/mAAC
4A Range 0.5 to 10mA 10 to 100mA 100mA to 4A
Accuracy 3%ofR±1mV 0.5%ofR±0.5mV 0.5%ofR±0.5mV
PhaseShift – < 15° < 10°
400A Range
Nominal Current: 400AAC
Measurement Range: 0.5A to 400AAC
Output Signal: 1mVAC/AAC
400A Range 0.5 to 10A 10 to 100A 100 to 400A
Accuracy 0.5%ofR±0.5mV 0.35%ofR±0.5mV 0.35%ofR±1mV
PhaseShift – < 1° < 0.6°
8
GroundFault/LeakageDetectorModel2620
Overloads
• Iplimitcurrent:permanent400ACRMS
• Peakcurrent:<1000A
• Permissibletransientdi/dt:≤30A/μs
• Conductortemperature:≤70°Cwithamaximumpeakof90°C
Load Impedance (DMM):1MΩmin
Frequency:48to1000Hz
Errors caused by external inuences:
Ambient temperature <0.1%per10K
Position of the gripped conductor
(maxwithnotcentredconductor)
0.1%typicofVOUT(non-dierential
current);0.2%max
Residual dierential
(maxwithnotcentredconductor)
0.1%typicofIP(dierentialcurrent);
0.2%max
External elds, 1V/A (1) <60mVofVs
External elds, 1mV/mA (1) <100μVofVs
Coupled DC current, 1V/A (2) <1mVforcontinuous1A
Coupled DC current, 1mVm/A (2) <0.1mVforcontinuous1A
Frequency, 1V/A (3) <1.5%from30Hzto1KHz
Frequency, 1mV/mA (3) <0.5%from30Hzto1KHz
(1): 400 A/m 50Hz eld perpendicular to the clamp opening
(2): DC current coupled onto an AC current
(3): Limited to 1KHz for 100A
3.3 Mechanical
Dimensions: 11.2x6.9x1.8"(285x175x45mm)
Weight:2.9lbs(1300g)approx
Jaw opening: 4.4"(112mm)
Maximum Jaw Gap:9.8"(250mm)
Maximum Clamping Capacity: Max4.5"(115mm)Øcable
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