1MRK 505 350-UEN Section 2
Signals
Technical Manual 11
Distributed busbar protection REB500
Table 7 BU input signals for BFP, EFP, OCDT, and PDF
Signal Description
The check zone criterion for the release of the bus bar protection
operation of BFP for the corresponding bay unit. When the
blocking signal is cancelled, the timers start again at t
Blocks operation of BFP of the corresponding feeder. When the
blocking signal is cancelled and providing a starting signal is
present and current is flowing, the timers start again at t = 0.
breaker sets this input when it cannot open, e.g.
because the air pressure is too low or there is a leak in the case
of GIS (Alarm Stage 3 - Circuit-breaker blocked). A tripping signal
is then transferred to the adjacent breakers (busbar trip) and
possibly the remote station.
Reserved for special applications
If this signal is set then the trip redirection is active in the same
way as it is for the 13605_Trip redirection _1.
This signal must not be used for pressure low input from circuit-
Reserved for special applications
This Bay Protection (BP) signal allows triggering the trip
redirection functionality if the signal "13605_Trip redirection _1" or
"13606_Trip redirection_2" is active.
This signal is directly activated by BP and does not therefore
appear as a binary input signal.
this input starts the breaker failure protection
timer (independently of the overcurrent measurement).
13710...13735_Start BFP Lp_x
1 to 3) starting of the breaker failure
protection with two inputs per phase (x = 1 to 2). The breaker
failure timer is started by this input signal providing the current in
the respective phase is above pick-up.
L1L2L3_x
phase starting of BFP by six inputs (x
timer is started by a signal at one of these inputs providing the
current in at least one phase is high enough.
13761_BP Start BFP L1L2L3_5
Functionally identical to signal "13760_Start BFP L1L2L3_5" but
directly activated by the bay protection unit and not appearing as
1, 2 or 3). The BFP timer
starts when this signal is activated by the bay protection function
and the BFP measures a current in the corresponding phase.
phase starting. The BFP timer starts when this
signal is activated and the BFP measures a current in any phase.
13790_BP External start BFP
phase starting. The BFP timer starts when this
signal is activated regardless of the current
13795...13796_Start BFP L0_x
starting of BFP with two inputs (x
1 or 2). The BFP timer is
started by this input signal providing the current in the neutral
Breaker failure protection with
starting. The breaker failure
protection timer starts when this signal is activated by the bay
protection function and the BFP measures a current in the neutral
system.
13810_Start BFP Q0 no I_2
The BFP timer starts when th
Breaker (11530_Breaker Position) is closed and valid
(independently of the overcurrent measurement).
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