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7.7.3
Protective conductor current
Class I
X
For test samples of protection class I, the protective conductor current is tested at mains voltage
to check it for proper insulation capacity. This is to ensure that no leakage or fault current flows
from the active components to earth and that there is no risk of a dangerous electric flow via
accessible conductive components [} page 83].
7.7.4
Contact current
Class I
X
The contact current must be measured on every accessible conductive component without
protective conductor connection [} page 84].
This is to ensure that there is no risk of a dangerous electric flow via accessible conductive
components. Accessible conductive SELV / PELV jacks can optionally be scanned, provided
that no damage to the test sample has to be expected.
For this purpose, the following measuring methods may be used:
• Direct current measuring method (direct measuring method)
• Differential current measuring method
• Alternative leakage current measuring method
7.7.5
Device leakage current (medical electrical devices)
Class I
-
The device leakage current corresponds to the sum of all leakage currents and is tested at
mains voltage for medical devices of protection classes I and II to prove proper insulation
capacity. This is to ensure that no leakage current flows from the active components, the
housing or accessible conductive components to earth and that there is no risk of a dangerous
electric flow via accessible conductive components [} page 86].
For this purpose, the following measuring methods may be used:
• Direct current measuring method (direct measuring method)
• Differential current measuring method
• Alternative leakage current measuring method
44
EN 50678 (VDE 0701)
EN 50699 (VDE 0702)
Class II
Class III
-
EN 50678 (VDE 0701)
EN 50699 (VDE 0702)
Class II
Class III
X
(optional)
EN 50678 (VDE 0701)
EN 50699 (VDE 0702)
Class II
Class III
-
BENNING ST 755+ / ST 760+
EN 62353
(VDE 0751‑1)
Class I
-
X
EN 62353
(VDE 0751‑1)
Class I
X
X
EN 62353
(VDE 0751‑1)
Class I
-
X
7.7 Individual tests
EN 60974‑4
(VDE 0544‑4)
Class II
Class I
-
X
EN 60974‑4
(VDE 0544‑4)
Class II
Class I
X
X
EN 60974‑4
(VDE 0544‑4)
Class II
Class I
X
-
5284 / 08/2023 en
Functions
Class II
-
Class II
X
Class II
-
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