Benning ST 755+ - Patient Leakage Current (Medical Electrical Devices); Functional Test; Table 18 Leakage Current Measurement (Test Standard and Protection Class)

Functions
7.7 Individual tests
5284 / 08/2023 en BENNING ST 755+ / ST 760+ 45
7.7.6 Patient leakage current (medical electrical devices)
EN50678 (VDE0701)
EN50699 (VDE0702)
EN62353
(VDE0751‑1)
EN60974‑4
(VDE0544‑4)
ClassI ClassII ClassIII ClassI ClassII ClassI ClassII
- - - X X - -
The patient leakage current is the current that flows from active applied parts via the patient to
the PEconductor (earth). It 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 applied parts to earth and that there is no risk of a dangerous electric flow for the
patient [}page88].
For this purpose, the following measuring methods may be used:
• Direct current measuring method (direct measuring method)
• Alternative leakage current measuring method
7.7.7 Functional test
EN50678 (VDE0701)
EN50699 (VDE0702)
EN62353
(VDE0751‑1)
EN60974‑4
(VDE0544‑4)
ClassI ClassII ClassIII ClassI ClassII ClassI ClassII
X X - X X X X
The functional test is intended for the final verification of electrical safety and is an obligatory
part of the test standards to be considered [}page90]:
• EN50678 (VDE0701)
• EN50699 (VDE0702)
• EN62353 (VDE0751‑1)
• EN60974‑4 (VDE0544‑4)
Non-electrical functions, e.g. cutting, lifting or turning, must be checked at a lower level.
The functional test includes the following for all single-phase test samples:
• Input voltage
• Input current
• Effective power
• Apparent power
Moreover, depending on the test standard and protection class, the corresponding leakage
current is measured.
Test standard Protection class Leakage current
EN50699 (VDE0701)
EN50699 (VDE0702)
EN60974‑4 (VDE0544‑4)
I I
PE
EN50699 (VDE0701)
EN50699 (VDE0702)
EN60974‑4 (VDE0544‑4)
II I
Cont
EN62353 (VDE0751‑1) I and II I
Leak
Table18: Leakage current measurement (test standard and protection class)
The functional test of three-phase devices can be carried out using the BENNINGMA2-16/
MA4 measuring adapter. Input voltage, input current as well as effective and apparent power
cannot be measured. If necessary, performance data of the measuring adapter are displayed,
but not those of the test sample.