Supplementary Information For Binary Inputs - ABB RELION REB500 Technical Manual

Section 5
Bay protection functions
Should a CondBlkAR signal occur during a reclosure cycle (that is, the AR in prog. signal is
active), it only becomes effective from the end of the current reclosure cycle and providing it is
still active.
A reclosure cycle remains blocked for the duration of the set blocking time t AR Block after the
last binary input has been enabled. Blocking also takes place during initialization of the
protection relay when its auxiliary supply is switched on or the parameter settings are being
loaded.
5.8.6.6

Supplementary information for binary inputs

Starting and tripping signals from the protection function: Start (Start 2,
Start 3), Trip CB and Trip CB 3P (Trip CB2, Trip CB3, Trip CB2 3P, Trip CB3
3P)
It is necessary to configure the three input signals Trip CB (general trip), Trip CB 3P (three-
phase trip) and Start to control the autoreclosure function. The normal procedure to achieve
this is to select the distance protection signals via the sub-menu OUTPUT FROM FUNCTION.
As the autoreclosure function is completely independent, signals from other functions may
also be selected.
Circuit-breaker ready signals: CB ready and CO Ready (CB2 ready and CO
Ready 2)
The inputs for the parameters
duplex scheme) must be connected to the circuit-breakers to signal that they are ready to
perform a complete reclosure cycle. In cases where one of the inputs is not used, it must be set
TRUE .
to
An active CB ready signal informs the autoreclosure function that reclosure is permissible
(that is, sufficient energy is available for a full open/close/open cycle).
Once a reclosure cycle has started, this signal is ignored because the pressure varies during a
reclosure cycle of an air-blast breaker.
Resetting of this signal is internally delayed by 100 ms.
The CO Ready signal (close-open cycle can be carried out) is only effective during a reclosure
cycle, that is, during the dead time. Should there be insufficient energy to open the circuit-
breaker again following closure, the close signal is disabled and a Def. Trip (definitive trip) is
generated.
This input is only used in conjunction with circuit-breakers, which provide the corresponding
information (C-O query), for example, spring-charged and air-blast circuit-breakers with two
switching energy levels.
Circuit-breaker open CB open (CB2 open)
It is also necessary to include the initial status of the circuit-breakers to prevent one from
receiving a close signal, which was already open before the fault occurred.
The binary input CB open (and CB2 open in a duplex scheme) is thus provided to determine the
initial status of a circuit-breaker.
The pick-up of these signals is delayed by 100 ms to prevent any unwanted blocking of fast
circuit-breakers.
A circuit-breaker which was already open before the Start signal was received (CB open at
logical 1) is not closed by the autoreclosure function.
144
CO Ready and CB ready (or CO Ready 2 and CB2 ready in a
© Copyright 2019 ABB. All rights reserved
1MRK 505 406-UEN B
GUID-BDAEAA7A-3A27-4EAE-8068-C824A6E3085A v1
Bay protection functions REB500
Technical manual