The CA6474 conforms with IEC 61326-1, IEC 61010, and IEC 61557-1-4-5 and is IP53 rated and CATIV 50V. An earth resistance tester with several functions that measures earth on pylons is the Chauvin Arnoux CA6474 Adaptor for Pylon Earth Measurements. It is possible to quantify continuity/resistance, ground potential, and earth coupling. The CA6474 provides a wide measuring range for the best resolution for analysing the frequency behaviour of earthing systems (41Hz to 5kHz). The CA6474 immediately determines the ground resistivity and earth coupling coefficient using the Wenner or Schlumberger technique as soon as the lengths between the rods are input. It also rejects interference voltages up to 60 Vpeak. Measurements can also be made of the resistance of the rods RE, RES, RS, and RH. With USB and optical link connectivity, users may keep 512 recordings in the internal memory. The CA6474 may be used to provide pylon earth measurements, offering crucial diagnostic and maintenance for the earthing systems of all kinds of pylons when combined with the Chauvin CA6472 earth and resistance tester. It is feasible to measure the earth impedance by using four current sensors (AmpFLEX) placed around the footings of pylons and a frequency scan up to 5kHz. When the two devices are used in tandem, measurements may be obtained for the following parameters: the resistance of the line as a whole, the resistance of the pylon being tested, the resistance of each pylon foot, and the resistance of the earth wire that connects the pylons.
- Reliability:-
± (2% plus 1 count) is the 4P/4P selective procedure.
For measuring DC resistance, use ± (2% + 1 count).
Earth measurement with two clamps: +/- 10% plus one count
Earth potential measurement: ± (5% + 1 count)
± (5% + 1 count) is the measurement method using CA 6474.
± (2% + 1 count) is the resistivity.
Combining Measurements:-
3P approach: Sure
Technical Details for Mechanical Systems:-
272 x 250 x 128 mm in size and 2.3 kg in weight (CA6474).
IEC 61326-1, IEC 61010, and IEC 61557-1-4-5 are all compliant with CAT IV 50 V electrical safety standards.
Memory/Transmission: USB/optical link/512 record memory
IP53 is the protection grade.
Frequency of Measurements-
3P technique: 100 kΩ to 0.1 Ω
4P/4P selective technique: 100 kΩ to 0.1 Ω
Measurements from 0.1 Ω to 100 kΩ using CA 6474
Frequency of Measurements:-
3P technique: 41–5,078 Hz
Selective technique 4P/4P: 41 to 5,078 Hz
DC resistance measurement: DC
Measurement of earth potential: 41 to 5,078 Hz
Earth measurement using two clamps: 1611 Hz, 1758 Hz, 1367 Hz for auto and manual modes
Measurements from 41 to 5,078 Hz using CA 6474
41 to 5,078 Hz is the resistivity.
Voltage Without Load:-
3P approach: 16 or 32 Vrms
16 or 32 Vrms for the 4P/4P selective technique
Two wires measuring DC resistance: ±16 VDC
measuring the earth with two clamps (16 or 32 Vrms)
16. or 32 Vrms is the earth potential measurement.
Measurements with CA 6474: 16 or 32 Vrms.
16, 32, or higher resistivity
Range:-
3P technique: from 0.01 Ω to 99.9 kΩ
Selective technique for 4P/4P: 0.001 Ω to 99.99 Ω
Measurement range for DC resistance: 0.001 Ω to 99.9 kΩ
Measurement of the earth with two clamps: 0.01 Ω to 500 Ω
Measurement of earth potential: 0.01 mV to 65.00 V
0.001 to 99.9 k in measurements with CA 6474
From 0.01kΩ to 99.9kΩ, resistivity
Conclusion:-
3P technique: 0.01-0.100 Ω
Method of 4P/4P selective: 0.001 Ω to 10Ω
Measurement of DC resistance: Two wires: from 0.01 to 100 Ω
- four wires: from 0.001 to 10 Ω
Measurement of the earth with two clamps: 0.01 Ω to 1 Ω
Measurement of earth potential: 0.01 mV to 10V
Testing with CA 6474: 0.001Ω to 10kΩ
Resistance: 0.01-200 Ω
Kind of measurement:-
3P technique: 3 cables
4 wires for the 4P/4P selective technique
Measuring DC resistance with two or four wires
Measuring earth potential using four wires
Maximum resistivity of 60 Vpeak
Measurement Type:-
Measurement of DC resistance: >
- 200mA DC
Interference from U:-
3P technique: Up to 60 Vpeak
Maximum 60 Vpeak using the 4P/4P selective technique
Maximum 60 Vpeak DC resistance measurement
Maximum 60 Vpeak earth potential measurement
CA 6474 measurements: Maximum 60 Vpeak
Using two clamps to measure the earth: Auto: Up to 60 Vpeak maximum
Resistivity: 60 Vpeak at most
Test strategy:-
Wenner and Schlumberger'
- s algorithmic estimate of resistivity z
- Examine the frequency behaviour of earthing systems between 41/hz and 5kHz.
Once the distances between the rods have been input, Wenner and Schlumberger'
- s methodologies are automatically applied to determine the ground resistivity and earth coupling coefficient.
USB and optical connection for communication from the device
A resistivity and earth combined test
Ground potential measurements and Earth coupling
Conforms to IEC 61326-1, IEC 61010, and IEC 61557-1-4-5 and is IP53 rated and CATIV 50V.
Calculate the pylon earth.
Measure resistance and continuity.
Rejects voltage interference up to 60 Vpeak
Furthermore measurable is the resistance of the rods RE, RES, RS, and RH.
512 recordings should be stored in the internal RAM.
The earth impedance may be measured with four current sensors (AmpFLEX) placed around a pylon'
- s footings and a frequency scan up to 5 kHz.
Broad measuring range for best possible resolution
Pylon earth measurements may be obtained with the Chauvin CA6474 when it is used in conjunction with the CA6472 earth and resistance tester