MI 2140 MI 2140 Omega &BetaPAT Instrument description
21
Fig. 4.19 Indication of aborted measurement
Notes:
• The appliance under test should be de-energized before the test.
• Consider any warning on the display (see Chapter 2.2) before starting
measurement.
• Do not touch the equipment under test during the test or before it is fully
discharged. The message “Discharging” is on display whilst the voltage on
equipment under test is higher than 30 V.
• Do not disconnect the equipment under test from the instrument during the
measurement or before it is automatically discharged.
4.3.3. Substitute leakage test
The purpose of this test is to predict the leakage current at nominal mains voltage and
to avoid danger for both the operator and the appliance under test where there is a
faulty insulation or a connection between PE and mains. Substitute leakage current is
measured at a nominal voltage of 40 V
AC
and is scaled to a nominal mains voltage
(115 V
AC
or 230 V
AC
).
In some cases, when large suppression capacitors are connected between L and PE
line, substitute leakage current can differ from conventional leakage current.
Substitute leakage current test of Class I appliances
For Class I appliances, test voltage is applied between mains lines (L and N lines are
shorted together in the tester) and ground line.
OR
CLASS
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