Sonel PAT-800, Operating Manual

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OPERATING MANUAL PAT-800/805 version 1.09 34
Connect the mains plug of the tested device into the test socket
of the meter. The measurement is made between shorted L, N
and PE. In addition, it is possible to carry out the measurement
with the probe connected to
R
ISO
- socket ( R
ISO
for PAT-800).
Settings and the measurement are as in 4.5.1.
Notes:
During the measurement in the test socket the voltage of mains is present.
During the measurement of a faulty device, RCD switch may be triggered off.
- Differential leakage current is measured as a difference between L current and N current. This
measurement takes into account not only PE leakage current, but also leakage currents caused by
other earthed elements - e.g. water pipe. The disadvantage of this measurement is the presence of
common current (supplied to the device through L line and returning via N line), which makes the
measurement difficult. If this current is high, the measurement will be less accurate (as described in
the technical data) than the measurement of PE leakage current.
- Tested device must be turned on.