Tripping Logic (Tr); Application; Functionality; Input And Output Signals - ABB REL 551-C1*2.5 Technical Reference Manual

Protect line differential protection terminal
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1.1
1.2
1.3
1.4
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Tripping logic (TR)

Tripping logic (TR)

Application

The main purpose of the TR trip logic function is to serve as a single node through which all
tripping for the entire terminal is routed.
To meet the different single, double, 1 and 1/2 or other multiple circuit breaker arrangements,
one or more identical TR function blocks may be provided within a single terminal. The actual
number of these TR function blocks that may be included within any given terminal depends on
the type of terminal. Therefore, the specific circuit breaker arrangements that can be catered for,
or the number of bays of a specific arrangement that can be catered for, depends on the type of
terminal.

Functionality

The minimum duration of a trip output signal from the TR function is settable.
The TR function has a single input through which all trip output signals from the protection func-
tions within the terminal, or from external protection functions via one or more of the terminal's
binary inputs, are routed. It has a single trip output for connection to one or more of the termi-
nal's binary outputs, as well as to other functions within the terminal requiring this signal.

Input and output signals

Note: Some signals may not be present depending on the ordered option.
Table 97:
Input signals for the TR (TRnn-) function block
Signal
BLOCK
TRIN
Note: Some signals may not be present depending on the ordered option.
Path in local HMI: ServiceReport/Functions/TRn/FuncOutputs
Table 98:
Output signals for the TR (TRnn-) function block
Signal
TRIP

Setting parameters

Path in local HMI: Settings/Functions/Groupn/TRn
Description
Block trip logic
Trip all phases
Description
General trip output signal
Chapter 7
Logic

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