Kyoritsu 4120A Manual do Utilizador

MODEL 4116A, 4118A, 4120ADIGITAL PSC-LOOP TESTERINSTRUCTION MANUALKYORITSU ELECTRICAL INSTRUMENTSWORKS，LTD.

―8―5. OPERATING INSTRUCTIONS5.1 Initial Checks - To be carried out before any testing.(1) Test Lead ConnectionInsert the lead plug into the conne

―9―(3) Voltage MeasurementWhen the instrument is first connected to the system, it will display thephase-neutral voltage which is updated every

―10―5.3 Measurement of Prospective Short Circuit Current − (Models 4118A and 4120A)(1) Set the instrument to the 20kA range.(2) Connect the test lead

―11―In the event of a fault, the Fault loop impedance should be low enough(and the Prospective Fault current higher enough) in order

―12―Fig.7According to the international Standard IEC 60364 for TT system thefollowing condition shall be fulfilled for each circuit:RA＜50/IaWhere:¡RAi

L1 L2 L3 N PE R R O RCD 30mA ―13―For this example max value is 1667Ω, the loop tester reads 12.74Ω, itmeans that the condition RA＜50/Iais resp

―14―For instance in a TN system with nominal mains voltage Uo = 230 Vprotected by gG fuses the Iaand max Zsvalues could be:Using the current ranges on

―15―Max value of Zs for this example is 2.1Ω (16A gG fuse, 0.4s) the loop testerreads 1.14Ω (or 202 A on Fault current range) it means that the condit

―16―6.3 Measurement of Line Impedance and Prospective Short Circuit CurrentLine Impedance on single-phase system is the impedance measuredbetween phas

―17―7. SERVICINGIf this tester should fail to operate correctly, return it to your distributor statingthe exact nature of the fault. Please remember t

CONTENTS1. SAFE TESTING ... 12. PROCEDURE OF REMOVING COVER ...

01-0592-1483DISTRIBUTORKyoritsu reserves the rights to change specifications or designsdescribed in this manual without notice and without obliga

―1―1. SAFE TESTINGElectricity is dangerous and can cause injury and death. Always treat itwith the greatest of respect and care. If you are not quite

―2―DANGER● This instrument is intended only for use in single phase operationat 230V +10% -15% AC phase to earth or for use in OLD-TTsystem phase

―3―2. PROCEDURE OF REMOVING COVERModel 4116A, 4118A and 4120A have a dedicated cover to protect againstan impact from the outside and prevent the oper

―4―3. FEATURES3.1 Instrument Layout1... LCD display2... Wiring check LEDs 3... Test button 4... Range switch5...

―5―3.2 Test LeadThe instrument is supplied with Model 7125 lead at socket outlets and Model7121 distribution board lead.(1) Model 7125(2) Model 7121(I

―6―3.3-3 Model 4116A, 4118A and 4120A have the following features:● Battery is not used All models are not battery-operated, but operate bythe voltage

―7―4. SPECIFICATIONS● Measurement SpecificationInstrument dimensions 186×167×89mmInstrument weight M-4120A / 960g, M-4116A and M-4118A / 750gReference