ABB REF615 - Application

6.3.3 Application
All trip signals from different protection functions are routed through the trip logic.
The most simplified alternative of a logic function is linking the trip signal and
ensuring that the signal is long enough.
The tripping logic in the protection relay is intended to be used in the three-phase
tripping for all fault types (3ph operating). To prevent the closing of a circuit breaker
after a trip, the function can block the CBXCBR closing.
The TRPPTRC function is intended to be connected to one trip coil of the
corresponding circuit breaker. If tripping is needed for another trip coil or another
circuit breaker which needs, for example, different trip pulse time, another trip logic
function can be used. The two instances of the PTRC function are identical, only the
names of the functions, TRPPTRC1 and TRPPTRC2, are different. Therefore, even
if all references are made only to TRPPTRC1, they also apply to TRPPTRC2.
The inputs from the protection functions are connected to the OPERATE input.
Usually, a logic block OR is required to combine the different function outputs to this
input. The TRIP output is connected to the binary outputs on the IO board. This signal
can also be used for other purposes within the IED, for example when starting the
breaker failure protection.
TRPPTRC is used for simple three-phase tripping applications.
A070881 V1 EN
Figure 90: Typical TRPPTRC connection
1MRS756378 D Section 6
Protection related functions
REF615 185
Application Manual