The Kewtech KEW4105A is an earth resistance tester for testing power distribution lines, in-house wiring systems, electrical appliances, etc. It also has an earth voltage range for earth voltage measurement.
The KEW4105A makes earth resistance measurement with the 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 a simplified two-wire measuring system are also supplied as standard accessories with the KEW K4105A.
FEATURES
- 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.
Specification: Kew 4105A Digital Earth Resistance Tester
- The latest circuit design permits the instrument to operate with the minimum influence from earth voltage and earth resistance of auxiliary earth spikes.
- Dust and drip proof. (designed to IEC 529 IP54)
- The earth resistance value can be read directly from the scale.
- Designed to meet IEC 61010-1 safety standards.
- Capable of measuring earth voltage.
- Small and lightweight. Shock-resistant new case material.
- 2mA measuring current permits earth resistance tests without tripping earth leakage current breakers in the circuit under test.
- The lead wire connection to C and P terminals and proper auxiliary earth resistance can be checked by the "OK" lamp. Lead wire connection to C and E terminals is good when the "OK" lamp is illuminated.
- Measurement Ranges Earth Resistance: 0~12 Ω/0~120 Ω/0~1200 ΩEarth Voltage [50,60Hz]: 0~30V AC
- Accuracy Earth Resistance: ±3% of full scaleEarth Voltage: ±3% of full scale
- Overload Protection Earth Resistance: 276V AC for 10 seconds across 2 of the 3 terminalsEarth Voltage: 276V AC for 1 minute
- Safety Standard: IEC 61010-1 CAT.III 300V Pollution Degree 2, IEC 61557
- Applicable Standards: IEC 60529 IP54
- Withstand Voltage: 3700V AC for 1 minute
- Power Source: R6P (AA) (1.5V) × 6
- Dimensions: 105(L) × 158(W) × 70(D)mm
- Weight: 600g approx.
