ABB REB500 - Page 24

Section 2 1MRK 505 350-UEN
Signals
16 Technical Manual
Distributed busbar protection REB500
Signal Description
31805_External release BB
zone
Enables the tripping signal for a section of busbar (AND gate with
tripping and enabling inputs). A maximum of 12 bus zones resp.
external release signals can be configured in one BIO unit. The entire
protection zone surrounding the busbar section is enabled (transfer
tripping). Sections connected by isolators are also enabled (transfer
tripping). The input can be used in special cases, for example, to
interlock the tripping signal by an undervoltage relay. This will
generally delay tripping.
31230_Block B
B zone
With this signal of the bus bar protection the inter
-
tripping and the
external trip of the BB block is blocked. A maximum of 12 bus zones
resp. blocking signals can be configured in one BIO unit. A complete
bus zone in which the BB block is located would be blocked (inter-
tripping). If the bus block is associated with an isolator then it is also
blocked (inter-tripping).
The input operates with a time delay of up to 300 ms.
31810_External reset
Tripping commands and signals can be configured to latc
h and when
they are, they are reset by a signal applied to this input. The same
signal also resets the LED’s (alarm and tripping). The reset signal
applies to the entire system.
31815_Ext. superv. in
service_1
Inputs for monitoring any fans, external supp
lies etc. Signal
41805_Alarm is set in the central unit when any of these signals
changes from logical 1 to 0.
31820_Ext. superv. in
service_2
31840…31885_GP_In_x
With a properly configured event configuration, the input signal can
be transmitted IEC103 and displayed on the control system.
Table 17 CU input signals for protection functionality
Signal Description
32205_Block BBP
Blocks BBP throughout the system.
32605_Bypass
Check Zone
Bypasses the check zone criterion for the
release of BBP
33210_Block BFP
Blocks BFP throughout the system. When cancelled, the timers start again at
t = 0 if the current is higher than setting.
34215_Block EFP
Blocks EFP throughout the system. When cancelled, the timers start again at
t = 0 if the circuit-breaker is open and the current higher than setting.
35220_Block
OCDT
Blocks OCDT throughout the system. When cancelled, the timers start again at
t = 0.
36705_General
Start DR
The disturbance recorders in all the bay units are started by this
input if
configured. The signal “General start disturbance recorder” must also be
configured in the bay units. The disturbance recorder in the central unit is not
started by this signal.
37205_Block PDF
Blocks PDF throughout the system. The timers restar
t at t
=
0 when the signal is
reset.
39205_Block BP
Blocks bay protection output signals throughout the system. Internal processing
of the functions continues and therefore measurements and signals continue to
be displayed on the local HMI.
Binary input signals cannot be used to trigger a disturbance record
in the central unit.