ABB RELION REB500 Operation Manual page 26

Section 3
Signals
1. Default value 1, if the input or function is not configured.
2. The output is blocked when Block output relays is active and signal 2) on HMI500 is
configured for blocking.
3. Blocked by isolator or differential current alarm (providing correspondingly configured via
HMI500).
4. Protection function disabled
5. CTs line side: transfer tripping
CTs busbar side: busbar intertripping
6. Detected automatically by the software when, for example, the CB is bridged.
7. Blocking the bay protection does not block the protection function itself, but only the
logical outputs of the bay protection functions, that is, although blocked measurements
are still displayed and trips signaled.
8. A BP output signal can be assigned for blocking the BFP function via the default blocking
signal 13210_BP Block BFP.
Table 21
Table 20: Effects of input signals to output signals
Effect
B
E
F
K
M
P
S
Z
20
When signal 31210_Block output relays is activated, the last status of all the
protection function outputs is retained.
and Table 22 list how an input can affect the output signal as explained in
Description
The signal is not changed (retained) providing it was configured for blocking.
The signal is not changed (retained).
Signal enabled (trip interlocked by enabling signal).
Blocks providing this blocking function were configured using HMI500.
Logic signal
Partially blocked, that is, the busbar protection does not issue any tripping
commands or signals. Other functions (BFP, EFP), which can also set this output, are
not affected by the blocking signal.
The signal is set.
The signal is either reset and blocked or simply blocked if it was not already blocked
when the blocking signal was generated.
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1MRK 505 400-UEN B
Table
Distributed busbar protection REB500
Technical manual
20: