ABB REB500 - Page 66

Section 6 1MRK 505 350-UEN
Additional functions
58 Technical Manual
Distributed busbar protection REB500
• Releasing “BBP_L1L2L3”, “BBP_L0”, “External TRIP BB Zone (CU)” and
“External TRIP BB Zone (BU)” always involves enabling intertripping of the
respective protection zone.
• Releasing “OCDT” and “PDF” always involves enabling the respective
function and only applies if the feeder is connected to the respective protection
zone. This is determined by the intertripping logic.
• Releasing “BFP” and “EFP” in columns 1 to 4 involves enabling intertripping
of these functions (e.g. BFP trip after t2).
Figure 26 Release criteria
Table 37 Release criteria
Release criterion Description
U only
Can only be select
ed if the voltage release function has been configured.
External release input
only
Can only be selected if input “31805_External release BB
-
zone” has been
configured.
U AND external release
input
“AND” logic of the voltage release criterion and the
input “31805_External
release BB-zone”. This can only be selected if the voltage release criterion
and the input “31805_External release BB-zone” have been configured.
U OR external release
input
“OR” logic of the voltage release criterion and the input “
31805_External
release BB-zone”. This can only be selected if the voltage release criterion
and the input “31805_External release BB-zone” have been configured.
Release corresponding
BU function
Can only be selected if a corresponding criterion in the oth
er 4 columns has
been configured.