Binary Inputs On Central Unit - ABB RELION REB500 Operation Manual

Section 3
Signals
3.4

Binary inputs on central unit

Most central unit signals can only be assigned once. However, two input signals
(31105_External TRIP BB zone and 31805_External release BB zone) occur for each busbar
zone. Thus, the busbar section must be given when selecting one of these signals.
Table 16:
Signal
31105_External TRIP BB zone
(BB zone tripped by external
signal)
31205_Block SP
31210_Block output relays
31215_Block IEC master
direction
31505_Accept bus image alarm
31805_External release BB zone
31230_Block BB zone
31810_External reset
31815_Ext. superv. in service_1
31820_Ext. superv. in service_2
31840...31885_GP_In_x
Table 17:
Signal
32205_Block BBP
32605_Bypass Check Zone
33210_Block BFP
34215_Block EFP
Table continues on next page
16
CU general input signals
Description
A busbar section can be tripped by a signal applied to this input. A
maximum of 12 bus zones respective external tripping signals can be
configured in one BIO unit. One input can be configured for each section.
Sections connected by isolators are tripped together (inter-tripping).
Blocks the station protection (SP) functions (BBP, BFP, EFP, OCDT and
PDF) including External Trip, External TRIP BB zone and inter-tripping
throughout the system.
All the output contacts configured for the central unit and all the bay units
are blocked, that is, the current status of the relays is maintained.
The system does not transfer any events, error messages or
measurements, to the master station via the station bus IEC60870-5-103
when this input is active.
Acknowledges (resets) an isolator alarm. If it is continuously active, a new
isolator alarm is immediately reset.
Enables the tripping signal for a section of busbar (AND gate with tripping
and enabling inputs). A maximum of 12 bus zones respective 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.
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
respective 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.
Tripping commands and signals can be configured to latch and when they
are, they are reset by a signal applied to this input. The same signal also
resets the LEDs (alarm and tripping). The reset signal applies to the entire
system.
Inputs for monitoring any fans or external supplies, the signal
41805_Alarm is set in the central unit when any of these signals changes
from logical 1 to 0.
With a properly configured event configuration, the input signal can be
transmitted IEC103 and displayed on the control system.
CU input signals for protection functionality
Description
Blocks BBP throughout the system.
Bypasses the check zone criterion for the release of BBP
Blocks BFP throughout the system. When cancelled, the timers start again
at t = 0 if the current is higher than setting.
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.
© Copyright 2019 ABB. All rights reserved
1MRK 505 400-UEN B
GUID-13FBFED3-E9A3-4377-9025-ACE9BA31088E v2
Distributed busbar protection REB500
Technical manual