1MRK 511 371-UEN
Section 2
Interbay bus functions
Communication Protocol Manual, IEC 60870-5-103
9
Distributed busbar protection REB500
The system continuously performs the above algorithm: It adds up the absolute
difference between the last two measurements (
current
and
last
) since the last
status update was sent (
sum
).
As soon as
sum
is greater than the threshold
delta
a new event will be sent with
the
current
value. If this value is below the
deadband
threshold, the value 0 will
be sent instead.
2.4.2
Configuring the SCS differential current parameter
The precise conditions for sending differential currents to the SCS can be set by
selecting HMI500 “Settings / Communication / SCS Diff. current parameters”.
Figure 6
Settings / Communication / SCS Diff. Current Parameters
Settings in this dialog are made for each busbar section (bus zone) and can be
changed after activating the respective field. The differential current parameters are
as follows:
