ABB RELION REB500 Technical Manual page 140

Section 5
Bay protection functions
Signal
t Oper
t Inhibit
t Close
t Discrim.1P
t Discrim.3P
t Timeout
t AR Block
Start
1)
Trip CB 3P
Trip CB
Start 2
Trip CB2 3P
Trip CB2
Start 3
Trip CB3 3P
Trip CB3
CB Ready
CO Ready
CB Open
Table continues on next page
134
Description
Maximum duration of a fault for AR
Period (CB recovery time) from the falling edge of the last reclosure attempt during
which the autoreclosure function is blocked and after which the function is reset.
In the event of an evolving fault between discrimination and dead times, the period
commences at the instant of another trip occurring between the two times.
The inhibit timer is also started if the protection trips after the fault duration time
t Oper has elapsed.
Duration of CB close signal
Evolving fault discrimination time for single-phase reclosure
Evolving fault discrimination time for three-phase reclosure
Period following the dead time during which the CB close signal has to occur. If it
does not, the Def. Trip signal is generated.
Time during which reclosure is blocked. t AR Block is started by every blocking
signal (Ext.Blk AR, Cond.Blk. AR, Manual Close, Inhibit Inp and MasternoSucc).
Input for signaling the start of a reclosure cycle. This I/P is connected to the General
start signal of a protection function.
Input for the three-phase trip signal. The three-phase trip from a protection
function is connected to this input.
I/P for the general trip signal. The general trip from a protection function is
connected to this input.
Set to off (F or False), if not needed.
Input for the AR start signal.
In redundant protection schemes, the general start signal from the 2nd protection
is connected to this input.
off (F or False), if not needed.
Set to
Input for the three-phase trip signal.
In redundant protection schemes, the general tripping signal from the 2nd
protection is connected to this input.
off (F or False), if not needed.
Set to
Input for the general trip signal.
In redundant protection schemes, the general trip signal from the 2nd protection is
connected to this input.
Set to off (F or False), if not needed.
Input for the AR start signal.
The general start signal from the 3rd protection can be connected to this input.
off (F or False), if not needed.
Set to
Input for the three-phase trip signal.
The three-phase tripping signal from the 3rd protection can be connected to this
input.
Set to off (F or False), if not needed.
Input for the general trip signal.
The general trip signal from the 3rd protection can be connected to this input.
off (F or False), if not needed.
Set to
Input excited by a signal from the CB when it is ready (open/close/open).
on (T or True), if not needed or not fitted.
Set to
Input logic: CB ready OR CB2 ready
In a duplex scheme, either an active CB ready or CB2 ready I/P enables an
autoreclosure cycle.
Resetting of this input is delayed internally by 100 ms.
Input excited by a signal from the CB when it is ready for a close/open cycle.
on (T or True) if not needed, not fitted and Dead line or ExtSCBypas not used.
Set to
Input logic for enabling the closing command: [(synchrocheck AND CO Ready) OR
Dead line OR ExtSCBypas].
Input excited by a signal from the CB when it is open.
off (F or False), if not needed.
Set to
To avoid the operation of fast circuit-breakers from being blocked unintentionally,
the effect of this input is delayed internally by 100 ms.
© Copyright 2019 ABB. All rights reserved
1MRK 505 406-UEN B
Bay protection functions REB500
Technical manual