f) After this treatment, they shall again withstand the tests of clause 13 and 15.
Faults which may occur in insulation, which did not show an excessive temperature rise during the test of
item 1, are ignored and are repaired, if necessary, in order to complete the tests of this subclause.
12.6DV D1
Modification: Remove item a) and, in item b), replace “item 1” with “12.3”.
13 Leakage current
13.1 The leakage current shall not be excessive.
Compliance is checked by the following test at a supply voltage equal to 1,06 times rated voltage.
The leakage current test is made with a.c. unless the tool is for d.c. only, in which case the test is not
made.
Protective impedance is disconnected from live parts before carrying out the tests.
It is recommended that the tool be supplied through an isolating transformer; otherwise, it must be
insulated from earth.
13.2 The leakage current is measured by means of the circuit described in Annex C between any pole of
the supply and:
• accessible metal parts and metal foil with an area not exceeding 20 cm x 10 cm in contact
with accessible surfaces of insulating material, connected together. The metal foil has the
largest area possible on the surface under test, without exceeding the dimensions specified. If
its area is smaller than the surface under test, it is moved so as to test all parts of the surface.
The heat dissipation of the tool must, however, not be affected by the metal foil.
Three-phase tools, which are suitable for single-phase supply, are tested as single-phase tools with the
three sections connected in parallel. For single-phase tools and three-phase tools to be tested as
single-phase tools, the leakage current is measured with the selector switch shown in Figure 3, in each
of the positions 1 and 2, and the switch SI in
″
on
″
position.
For three-phase tools not suitable for single-phase supply, the leakage current is measured according to
Figure 4 with the switches a, b and c in
″
on
″
position. For tools intended to be connected in star
connection only, the neutral is not connected.
The leakage current is measured within 5 s after the application of the test voltage and shall not exceed
the following values:
– to accessible metal parts and metal foil:
- for class I tools 0,75 mA;
- for class II tools 0,25 mA;
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