ABB RELION REB500 Operation Manual page 15

1MRK 505 400-UEN B
Signal
11120_BP External TRIP
11125_BP External TRIP BB zone
11205_Block SP
11210_Block output relays
11215_Ext. measuring disturbed
11505_Close command CB
11510...11525_Supervision aux.
voltage_x
11530_Isolator/Breaker Position
11605_External release Trip
11610_External reset
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Distributed busbar protection REB500
Technical manual
Description
Tripping signal generated by the feeder protection part. Trips faults
on a line or power transformer with the aid of the REB500 tripping
contact. Tripping thus takes account of the busbar configuration at
the time.
To function correctly, the signal has to be assigned to a feeder.
The simplest arrangement corresponds to the assignment of the
signal 11105_Ext. TRIP to feeders. If signal 11105_Ext. TRIP is not
available, a binary output has to be configured for 11120_BP
External TRIP which is then assigned to a feeder. The signal is
activated by the feeder protection directly and does not therefore
appear as binary input signal.
This is a tripping signal generated by the feeder protection part
which is used to trip the entire bus zone to which the feeder is
connected. The tripping command is applied to all the bay units of
the bus zone and sections of busbars interconnected by an isolator
(intertripping).
A signal applied to this input blocks the local station protection
functions (BFP, EFP, OCDT and PDF), External Trip, tripping by the
busbar protection and intertripping of the respective bay unit. The
Bus Bar Protection continues to be active as a system function. The
primary injection of the concerned bay unit can lead to a trip of the
respective zone.
All the output contacts configured for a bay unit are blocked.
This signal is active when invalid analogue values are received from
an external device. The busbar protection (that is, the specific
protection zone of the busbar) and all the local protection functions
are blocked. If the disturbance lasts longer than 400 ms, diagnostic
events are generated (BBP Minor Error 9 and BBP Minor Error 20).
This input should only be used in special cases and only when
engineering a REB500 system.
The circuit-breaker close command is needed by the busbar and end
fault protection in bus-tie breaker and configured feeder bay units
to control the REB500 measuring system.
The supervision of the auxiliary supply is configured when the
compliance of the auxiliary contacts on the isolators with the
required switching sequence cannot be guaranteed and for this
reason the Not OPEN = CLOSED logic has to be used. These signals
ensure that the protection responds correctly should the auxiliary
supply to the isolators fail.
This signal is only applicable in the case of Not OPEN = CLOSED.
The supervision signals affect all switchgear objects or associated
with this BU independent of the respective supervision voltage
levels.
The position of a circuit-breaker or an isolator is signaled by one or
two auxiliary contacts.
Providing they have been configured, a signal applied to this input
enables tripping by the busbar protection and the intertripping
function in the bay unit (AND logic of tripping and enabling signals).
The input has no influence on other protection functions. This input
can be used in special cases to interlock tripping by the protection
by, for example, an external undervoltage relay.
Tripping commands and signals can be configured to latch after
picking up, in which case they must be reset by applying a signal to
this input.
It also resets the text display and LED's on the local control unit. A
reset signal resets the entire system.
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Section 3
Signals
9