SMY133-SMY134-SMP133 Operating Manual
6.2.2.4 RCM Condition
Instruments equipped with a residual current monitoring (RCM) inputs can be used for indication of
network isolation state failures using this condition.
Add the condition and check RCM currents
I
Δ
x
to be monitored. Then set the residual current limit,
polarity of deviation, actual/average current value evaluation, hysteresis and delay.
Fig. 6.23 : I/O Setup – RCM Condition Properties
Up to four such different conditions can be created and used.
Do not forgot to set residual current monitoring ratio
CT
RCM
in the Installation Setting group of
parameters !
6.2.2.5 Time Condition
This condition can be used as a single timer.
•
Time
… date & time since the condition result either gets true forever or starts pulsing
•
Fixed / Pulse
… if
Fixed
, the condition gets true forever after the specified date & time
passes; if
Pulse
, the condition gets true periodically (for one I/O block evaluation cycle) with
the
Repeat every
period
Fig. 6.24 : I/O Setup – Time Condition Properties
6.2.2.6 Variable Condition
If any
Variable
action is defined (see description above), it can be used in the same way as other
basic conditions.
The setup is similar as the digital input condition – specify the variable number, polarity and the block
time.
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