Operation Manual

08/ 2012 17 / 58
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BENNING ST 750 A
9. Overview for Tests according to DIN VDE 0751-1 / EN 62353:2008-08
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Protection class I
(with protective conductor)
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Protection class II
(without protective conductor)
5.1* Scope of testing: *) The gures stated refer to DIN VDE 0751-1:2008-08.
5.2 Visual inspection / inspection
Check for visible damages of the following:
- connecting cables / plug-and-socket connections
- housing
- strain relief, protection against bending and kinking ...
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5.3.2 Measuring the protective conductor resistance
Continuity between the earthing contact of the mains plug and accessible con-
ductive parts of the device or of the device connection
Medical electrical device with non-detachable mains connection cable: ≤ 0.3 Ω
Medical electrical device with detachable mains connection cable: ≤ 0.2 Ω
Detachable mains connection cable: ≤ 0.1 Ω
Detachable mains connection cable + medical electrical device: ≤ 0.3 Ω
Medical electrical device with permanent connection: ≤ 0.3 Ω
System with multiple socket: ≤ 0.5 Ω
5.3.3 Measuring leakage currents:
5.3.3.2 Device leakage current
Alternative leakage current measurement:
Direct / differential current measurement:
5.3.3.3 Leakage current of applied part
Alternative leakage current measurement (AC*):
Direct current measurement (AC*):
Type B
≤ 1000 µA
≤ 500 µA
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Type BF
≤ 1000 µA
≤ 500 µA
≤ 5000 µA
≤ 5000 µA
Type CF
≤ 1000 µA
≤ 500 µA
≤ 50 µA
≤ 50 µA
Type B
≤ 500 µA
≤ 100 µA
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Type BF
≤ 500 µA
≤ 100 µA
≤ 5000 µA
≤ 5000 µA
Type CF
≤ 500 µA
≤ 100 µA
≤ 50 µA
≤ 50 µA
5.3.4 Measuring the insulating resistance
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No limiting values in VDE 0751-1 / EN 62353 standard.
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No limiting values in VDE 0751-1 / EN 62353 standard.
5.4 Functional test
Functioning of safety equipment and function test
6. Measuring results, analysis, evaluation, documentation
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(inspection and preparation for intended use)
* Note 1: The DIN EN 62353 (VDE 0751-1):2008-08 standard does not contain any measuring methods and admissible values for devices generating DC leakage currents. In this case, the
manufacturer should provide specifications in the accompanying documents.
* Note2:"Particularrequirements"mightallowotherleakagecurrentvalues.
* Note 3: In the current issue of the DIN VDE 0751-1 standard, the measurement of the insulating resistance is required, if it is considered to be convenient. Insulation measurement must not be carried
out, if it is excluded in the accompanying documents according to the manufacturer's specifications. Limiting values for the insulating resistance are not specified in the DIN VDE 0751-1/ EN 62353
standard (issue 2008). Here, it is possible to refer to recommendations of the manufacturer or to previously measured values.