16
General Information
POWERMOBIL
SPR2-240.831.01.02.02
Siemens AG
07.05
CS PS 24
Page 16 of 44
Medical Solutions
1.7
Information on the protective conductor resistance test
Observe the instructions in the safety rules for installation and repair (ARTD-002.731.17
...).
The protective conductor resistance is to be measured, documented, and evaluated dur-
ing maintenance.
NOTE
Evaluate the results by comparing the first measured value to the
corresponding values documented during preceding maintenance
procedures or safety checks.
A sudden or unexpected increase in the measured values may in-
dicate a defect in the protective conductor connections - even if
the limit value of 0.2 Ohms is not exceeded.
(Protective conductor or contacts).
The measurement must be performed according to DIN VDE 0751, part 1 (see ARTD part
2). In this case the protective conductor resistance for all touchable conductive parts must
be measured during the normal operating state of the system.
Make sure that control cables or data cables between the components of the system are
not mistaken for a protective conductor connection.
During the measurement the power cable and additional connection cables which also
make the ground wire connection between parts of the system (e.g., monitor cable
between C-arm chassis and monitor trolley) must be moved section by section to detect
broken conductors.
The protective conductor resistance must not exceed 0.2 Ohms.
Fig. 2:
Measuring circuit for measuring the protective conductor resistance in units/systems that
are permanently connected to the power supply net (according to DIN VDE
0751-1:2001-10, Fig. C3).
Pos. 1
System
Pos. 2
Application part (not available)
Pos. 3
Measurement setup (integrated into measuring device)
