Kewtech KEW4105A Earth Resistance Tester
Includes: Test leads, 20m red crock clip lead, 10m yellow crock clip lead, 5m green crock clip lead, simplified measurement probes, auxiliary earth spikes, batteries K4105a Manual and carry case.
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The Kewtech KEW4105A is an earth resistance tester for testing power distribution lines, in-house wiring system, electrical appliances etc. It also has an earth voltage range for earth voltage measurement.
The KEW4105A makes earth resistance measurement with fall-of-potential method, which is a method to obtain earth resistance value Rx by applying AC constant current I between the measurement object E (earth electrode) and C (current electrode), and finding out the potential difference V between E and P (potential electrode).
In addition to the facility for precision measurement, test leads for simplified two wire measuring system also supplied as standard accessories with the KEW K4105A.
20 / 200 / 2000Ω earth resistance ranges.
Measures earth voltage.
Allows earth resistance testing without tripping earth leakage current breakers.
2 wire simplified measurement system included as standard.
Dust and drip proof.
Automatic warning of excess tolerance of auxiliary earth spikes.
Complies with BS 7671.
|Earth Resistance Ranges||20 Ω, 200 Ω, 2000 Ω.|
|Earth Voltage Range||200 V ac.|
|Withstand Voltage||3700 V ac for 1 minute.|
|Accuracy||±(1% + 4 dgt) earth voltage range
±(2% + 1.0Ω) (20 Ω range)
±(2% + 3dgt) (200 Ω, 2000 Ω ranges).
|Operating Temperature and Humidity||0 - 40°C, relative humidity 85% or less (no condensation).|
|Insulation Resistance||5MΩ or more at 500V between the electrical circuit and the housing case.|
|Power Source||6 x 1.5 V AA.|
|Dimensions||105 x 158 x 70 mm.|
|Boxed weight||2.3 kg.|
|Kewtech KEW4105A warranty||2 year.|