Requirements 1 - 5
Siemens AG SPR8-125.034.02 Page 5 of 10 POLYMOBIL Plus
Medical Solutions Rev. 02 03.05 CS PS 24
Information on the protective conductor resistance test 1
Observe the statements in the safety engineering rules for installation and maintenance
(ARTD-002.731.17...).
The protective conductor resistance of 0.2 ohms must not be exceeded.
First measurement
Perform the protective conductor test after completion of all other work.
Perform the measurement according to DIN VDE 0751, Part 1 (see ARTD Part 2). In this
case the protective conductor resistance to all conductive parts that can be touched must
be measured in the normal operating state of the system.
It must be assured that control cables or data cables between the components of the sys-
tem simulate no protective conductor connection.
During the measurement the power supply cable and additional connection cables with
integrated protective conductors must be moved section by section to detect wire breaks.
The protective conductor resistance must not exceed 0.2 ohms.
Record the values as first measured values in the report ’Protective conductor resistance
/ report’ stating the measuring points.
In addition document the measuring method and the measuring instrument used (desig-
nation and serial number).
Repeat measurement
In maintenance or repairs perform the protective conductor resistance measurement
anew.
Document and assess the values determined in the repeat measurement.
Fig. 2 Measuring circuit for measuring the protective conductor resistance in systems that are separated from the
power supply, according to DIN VDE 0751-1:2001-10, Fig. C2.
1 = System
2 = Application part (not available)
3 = Measuring arrangement (integrated in the measuring instrument)
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