7 Proving safe isolation (SELV, PELV)3
For devices generating SELV PELV voltage means isolating
transformer switch-mode power supply
Proving the rated voltage: (compliance with specifications (SELV/PELV))
- Output voltage measurement (e.5 the value falls below the limiting value, the device still shall considered proper condition long the limiting value for
the protective conductor current not exceeded.5 additionally: 0.3 Testing the protective conductor
Continuity between the earthing contact the mains plug and acces
sible conductive parts ofthe device ofthe device connection
For cables with rated current 16A
up 0.6 Measuring the contact current3 0.0 0
For cables with higher rated currents, the calculated ohmic resistance
value shall apply
5.
08/ 2012 58
.1* Scope testing: The figures stated refer DIN VDE 0701-0702:2008-06.
5.25 MO
5.3 for devices with heating elements1with power 3. rview Tests acco DIN 0701 -0702:2 008-06
Q
Protection class I
(with protective conductor)
- extension cables and connecting cables
- electrical equipment, e. for devices containing heating elements
with total power more than 3.2 Visual inspection
Check for visible defects and suitability regarding the field application:
- connecting cables plug-and-socket connections
- housing, strain relief, protection against bending and kinking .g.4 Measuring the insulating resistance3 M0
> for proving safe isolation
> 0.
5.1 0
maximum: 1. 25V 60V for accessible active parts
- Insulating resistance measurement (primary secondary)
- Insulating resistance measurement (between accessible conductive parts and active parts ofthe SELV PELC circuit)
5..5 Measuring the protective conductor current2,3 3.5 mA4
at conductible components with protective conductor connection
1 mA/ max.8 5.5 mA
at conductible components without protective conductor connection
< 0.5 kW
> 0. electrical hand tools
m
Protection class II
(without protective conductor)
- device connecting cables
- electrical equipment, e.BENNING BENNING 750 A
8. for chargers, mains supply units): max.5 mA
at conductive components
5.5kW
5.3 0
for each further 7.g.g. electrical hand tools
Protection class III
5..10 Functional test Functioning safety equipment and function test
Analysis, evaluation, documentation
A Additional notes concerning the table "Tests according DIN VDE 0701-0702":
1 for devices containing heating elements with power 3
