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Summary of Contents for Kyoritsu Electrical Instruments Works, Ltd. KEW 4140
- Page 1 INSTRUCTION MANUAL DIGITAL LOOP/PFC/PSC TESTER ＫＥＷ 4140 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 2: Table Of Contents
CONTENTS 1. Safe Testing ･･･････････････････････････････････････････ 1 2. Instruments Layout ･･････････････････････････････････････ 3 3. Accessories ････････････････････････････････････････････ 6 4. Features ･･･････････････････････････････････････････････ 7 5. Specification･ ･･････････････････････････････････････････ 8 5.1 Measurement Specification ･･････････････････････････ 8 5.2 Operating Error ･････････････････････････････････････ 9 5.3 General Specification ･･････････････････････････････10 5.4 Applied Standards ･････････････････････････････････10 6. -
Page 3: Safe Testing
1. Safe Testing Electricity is dangerous and can cause injury and death. Always treat it with the greatest of respect and care. If you are not quite sure how to proceed, stop and take advice from a qualified person. This instruction manual contains warning and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition. - Page 4 # DANGER ● T his instrument is designed to work in distribution systems where the line to earth has a maximum voltage of 300V 50/60Hz and for some ranges where line to line has a maximum voltage of 500V 50/60Hz. Be sure to use it within this rated voltage.
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Page 5: Instruments Layout
2. Instrument Layout 1. Front View ④ ⑥ ⑤ ① ⑦ ⑧ ⑨ ② ⑩ ③ Fig.2-1 Name Operation ① Display(LCD) ② Test Switch Start measurements. 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... - Page 6 2. Input Terminal ① ② Fig.2-2 ① Terminal Names for : L:Line LOOP,VOLTS PE:ProtectiveEarth N:Neutral(forLOOP) ② Terminal Name for L1:Line1 PHASEROTATION L2:Line2 L3:Line3 3.LCD Sub Display Main Display Fig.2-3 ̶ 4 ̶ GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 7 List of Display Message Battery symbol Displayed when the measured values exceed the displayable range. (over-range) e.g.Thedisplayshows“>1999Ω”ataLOOPtestwhen atestresultexceeds1999Ω. Displayed when “L-PEATT ON” function is selected to indicate ATT is on. 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.
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Page 8: Accessories
3. Accessories 1.MainTestLead(Model7218) Fig.3-1 2.DistributionBoardTestLead(Model7246) Fig.3-2 3.SoftCaseModel9156…x1 4.StrapBeltModel9155…x1 5.Battery…x6 ̶ 6 ̶ GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com... -
Page 9: Features
4. Features The KEW4140 LOOP/PFC/PSC tester performs three function in one instrument. 1Loopimpedancetester 2 Voltage tester 3Phaserotationtester TheKEW4140havethefollowingfeatures: ATT (Anti Trip Technology) ATT enables a measurement without tripping the RCDs with the rated residual current of 30mA or more. Wiringcheck Three Wiring symbols indicate if the wiring of the circuit under test is correct. -
Page 10: Specification
5. Specification 5.1 Measurement Specification LoopImpedance Rated Voltage NominalTestCurrent Function Range at0ΩExternalLoop: Accuracy Guaranteed Voltage (Operating Voltage) (Auto-Ranging) Magnitude/Duration Range (＊1) L-PE: 230V(50／60Hz) L-PELOOP: 20Ω: 20Ω:0.00-19.99Ω 6A/20ms ATT OFF 200Ω:20.0-199.9Ω 200Ω: ±(3%rdg+4dgt) (100∼280Ｖ) 2000Ω:200-1999Ω 2.3A/20ms (＊2) (45∼65 Hz) PFC/PSC: 2000Ω: 230 V (+10%/-15%) 2000A：0-1999A 15mA/250ms... -
Page 11: Operating Error
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 Operating range compliant... - Page 12 5.3 General specification Instrument dimensions 84X184X133mm Instrument weight:- 860g(includingbatteries.) Reference conditions Specifications are based on the following conditions except where otherwise stated:- 1.Ambienttemperature:23±5°C: 2.Relativehumidity45%to75% 3.Position:horizontal 4.ACpowersource230V,50Hz 5.DCpowersource:9.0V 6. Altitude up to 2000m, Indoor use Battery type Six 1.5V AA batteries 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.
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Page 13: Preparation For Measurement
6. Preparation for Measurement CheckofBatteryvoltage (1)See“12.Batteryreplacement”andinstallbatteriesinKEW4140. (2) P ressthePowerswitchonKEW4140foratleast1sectopower on the instrument. * P owerswitchisactivatedonlywhentheswitchispressedfor1 sec or more. 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. - Page 14 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 impedance should be measured. In the event of a fault the earth fault loop impedance should be low enough (and the prospective fault current high enough) to allow automatic disconnection of the electrical supply by the circuit protection device within a prescribed time interval.
- Page 15 AccordingtotheInternationalStandardIEC60364,forTTsystems the characteristics of the protective device and the circuit resistance shall fulfill the following requirements: Ra x Ia ≤ 50V Where: RaisthesumoftheresistancesinΩofthelocalearthsystemand the protective conductor for the exposed conductive parts. 50 is the maximum safety touch voltage limit (it can be 25V in particular cases like construction sites, agricultural premises, etc.).
- Page 16 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 following impedances.
- Page 17 -400msforfinalcircuitsnotexceeding32A(at230/400VAC) -5sfordistributioncircuitsandcircuitsover32A(at230/400VAC) The compliance with the above rules shall be verified by: 1)MeasurementofthefaultloopimpedanceZsbyLooptester. 2) Verification of the characteristics and/or the effectiveness of the associated protective device. This verification shall be made: - for circuit-breakers and fuses, by visual inspection (i.e. short time or instantaneous tripping setting for circuit-breakers, current rating and type for fuses);...
- Page 18 Fig.7-4 MaxvalueofZsforthisexampleis1.44Ω(MCB16A,characteristic C),theInstrumentreads1.14Ω(or202AonFaultcurrentrange)it meansthattheConditionZsxIa≤Uoisrespected. InfacttheZsof1.14Ωislessthan1.44Ω(ortheFaultcurrentof 202 A is more than Ia of 160A). In other words, in case of fault between phase and earth, the wall socket tested in This example is protected because the MCB will trip within the disconnection time required. 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...
- Page 19 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 Always 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 your distributor.
- Page 20 or symbol is indicated on the LCD, DO NOT PROCEEDAS THEREISINCORRECTWIRING.Thecauseofthefaultmustbe investigated and rectified. 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.
- Page 21 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 displayed on Sub Displayaftertests L-PE ⇨...
- Page 22 ● M easured result may be influenced depending on the phase angle of the distribution system when making measurement near a transformer and the result may lower than the actual impedance value. Errors in measured result are as follows. SystemPhase Error Difference (approx.)
- Page 23 Fig.7-10ConnectionforLine–Neutralmeasurement Fig.7-11ConnectionforLine–Linemeasurement ̶ 21 ̶ GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 24 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 not be a 3-phase system or a wrong connection may have been made.Checkthecircuitandtheconnection. ● P resence of Harmonics in measurement voltages, such as an inverter power supply, may influence the measured results.
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Page 25: Back Light
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. Backlight automatically turns off in 2 minutes after it turns on. 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... -
Page 26: Battery Replacement
12. Battery Replacement # DANGER ● N ever open the battery compartment cover while making measurement. To avoid possible electrical shock, disconnect the test probe before opening the cover for battery replacement. # CAUTION ●Installbatteriesincorrectpolarityasmarkedinside. ● D onotmixbatteriesofdifferenttypesornewbatterieswithused ones. Whenthedisplayshowsthelowbatteryindication, , disconnect the test leads From the instrument. - Page 27 13. Servicing If this tester should fail to operate correctly, return it to your distributor stating the exact nature of the fault. Before returning the instrument ensure that:- 1.The batteries are in good condition. 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 28 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) Attach the Side Belt to Buckle the instrument as shown inFig.14-2.(bothsides) Side Belt Fig.14-1...
- Page 29 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.(Store the test leads in the partition.) Complete Test Lead Strap belt Tie up the test...
- Page 30 MEMO GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 31 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 10-05 92-2019A GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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