Notes On Device Leakage Current Measurement - Siemens SIREMOBIL Iso-C Service Instructions Manual

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NOTE

Notes on device leakage current measurement

Observe the instructions in the safety rules for installation and repair
(ARTD-002.731.17 ...).
WARNING
First measured value
In most cases, the first measured value has already been determined and documented in
the device leakage current record.
The measurement was performed with the recorded line voltage, line frequency and with
the recorded measuring equipment.
If the local line voltage or line frequency deviates from the line voltage or line frequency
documented in the record (e.g. change of location with different local line voltage / line fre-
quency), or if no documented measured values are available, then perform the device lea-
kage current measurement. Mark the old values as invalid. Cross out the values, enter the
comment "invalid values" and confirm with name, date and signature.
Adjust/program the system to the local line voltage / line frequency before the measure-
ment.
Measurement
Perform the measurement according to DIN VDE 0751, Part 1 (see ARTD-002.731.17....),
and record the value determined as the first measured value.
Measurement of the device leakage current according to the residual current procedure
(measuring arrangement according to Fig. 2) must be given preference, since no danger
for the person performing the measurement or any other persons arises during the mea-
surement.
However, please note the minimum resolution of the leakage current measuring instru-
ment and any additional manufacturer's data restricting the use of the measuring
instrument.
SIREMOBIL Iso-C
System Manual
Evaluate the results by comparing the first measured value with
the corresponding values of preceding maintenance procedures
or safety checks.
A sudden or unexpected increase of the measured values may
indicate a safety-relevant defect - even if the limit value of 0.2
Ohms is not exceeded (protective ground wire or contacts).
Electric voltage!
Noncompliance can lead to severe injuries and even death.
The device leakage current measurements may be performed on
systems of protection class I only after the protective conductor
test has been passed.
SPR2-230.061.01
Rev. 13
Page 8 of 18
12.04 CS PS 24
Prerequisites
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