Bender RCMA423AS, Руководство пользователя

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Safety instructions
14 RCMA423AS_D00157_01_M_XXEN/08.2016
2.3 Intended use
The AC/DC sensitive residual current monitor RCMA423AS is designed for use
in earthed systems (TN and TT systems) where DC and AC fault currents may
occur. These are in particular loads containing six-pulse rectifiers or one way
rectifiers with smoothing, such as converters, battery chargers, construction
site equipment with frequency-controlled drives.
Two separately adjustable response ranges allow to distinguish between
prewarning (
I
Δ
n1
= 50…100 % of the set response value I
Δ
n2
) and alarm ( I
Δ
n2
).
Since the values are measured with measuring current transformers, the
RCMA423AS is nearly independent of the nominal voltage and the current of
the system being monitored.
In order to meet the requirements of the applicable standards, customised pa-
rameter settings must be made on the equipment in order to adapt it to local
equipment and operating conditions. Please heed the limits of the range of
application indicated in the technical data.
Any use other than that described in this manual is regarded as improper.
2.4 Information about factory setting
If you want to reset the residual current monitor to factory settings, refer to
page 37; page 38 provides a summary of all factory settings.