Release Logic / Matrix - ABB REB500 Technical Manual

1MRK 505 350-UEN
6.2.2
6.2.2.1
6.2.2.2
Technical Manual
Distributed busbar protection REB500
Figure 25 Settings / Overcurrent Release

Release logic / matrix

The overcurrent release described in Section 6.2.1 is completely
independent of the functions described in this section.
The operation of the internal voltage release (option) and the general enabling
inputs for each protection zone is determined by the configuration of the release
logic (matrix). This involves entering the release criteria in the columns and the
protection functions they affect the rows.
The release criteria can refer to bay unit functions or a protection zone.
Enabling bay unit functions (column 5)
Checking the boxes in column 5 of Figure 26 subjects tripping of the functions in
the bay concerned to being enabled by the voltage release. These include breaker
failure protection, end fault protection and bay unit "External TRIP" signal. The
release condition still applies when the feeder is not assigned to a protection zone.
Enabling protection zone functions (columns 1 to 4)
Checking the boxes in column 1 to 4 of Fig. Figure 26 subjects inter-tripping of
protection zones or the functions of bay units switched onto the respective
protection zone to being enabled by the voltage release.
Section 6
Additional functions
57