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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

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:

Pos. 1

Pos. 2

Pos. 3

SIREMOBIL Iso-C

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).

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).

System

Application part (not available)

Measurement setup (integrated into measuring device)

SPR2-230.101.02.06.02

07.05

General Information

Page 16 of 46

CS PS 24

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