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14
Manual testing according to VDE 0544-4 (EN/ IEC 60974-4)
14.1
Overview of standard-related specifications
Protection class I
(Class I)
Protection class II
(Class II)
5*
Scope of testing:
*) The figures stated refer to VDE 0544-4:2017-05 (EN 60974-4:2016).
5.1
Visual inspection
The following must be checked:
Torch/ electrode holder
Mains supply
Welding circuit
Housing...
X
X
5.2
Continuity of the protective
conductor circuit
Resistance between a
conductive part connected to the
protective conductor for
protective reasons and the
protective contact of the mains
plug or device plug or the
protective conductor connection
point of the device
For cables with a rated current of
≤ 16 A
up to
5 m
:
≤ 0.3 Ω
for each additional 7.5 m:
0.1
Ω
max.:
1.0
Ω
For cables with higher rated currents, the calculated
ohmic resistance value shall apply.
- - -
5.3
Insulating resistance
Mains circuit to welding circuit
≥ 5.0 MΩ
Welding circuit to protective conductor circuit
≥ 2.5 MΩ
Mains circuit to protective conductor circuit
≥ 2.5 MΩ
Mains circuit to welding circuit
≥ 5.0 MΩ
Mains circuit to accessible
surfaces
≥ 5.0 MΩ
5.4
Contact current of the welding
circuit
Welding outputs to protective
conductor connection
Alternating current r.m.s. value
≤ 10.0 mA
R.m.s. value
≤ 10.0 mA
5.5
Contact current during normal
operation
for accessible conductive
surfaces which are not
connected to the protective
conductor circuit.
R.m.s. value
≤ 0.5 mA
R.m.s. value
≤ 0.5 mA
5.6
Protective conductor current
R.m.s. value
≤ 10.0 mA
- - -
5.7
Open-circuit voltage
Environment with increased
electrical hazard
Environment without
increased electrical hazard
The U
0
peak values must be
≤ U
0
x 1.15
and the values stated in
Table 13
of
IEC 60974-1
must not
be exceeded.
113 V DC
peak value
68 V AC
peak value
48 V AC
r.m.s. value
113 V DC
peak value
113 V AC
peak value
80 V AC
r.m.s. value
6
Functional test
Functioning of safety equipment and function test
7
Analysis, evaluation,
documentation
Inspection and preparation for intended use
Welding equipment not constructed in compliance with EN/ IEC 60974-1 (e. g. constructed before the date of publication of the first edition
(1989)) might not meet all the requirements of this standard.
In this case, the testing person should indicate the following in his report:
-
Requirements that are not met,
-
Extent to which the requirements were not met,
-
Risk assessment to be concluded,
-
Corrective measured, if necessary.
The report should enable the owner to make an appropriate decision on the further use of the equipment.
