Application - ABB 615 series Technical Manual

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Protection related functions

Application

All trip signals from different protection functions are routed through the trip logic. The

most simplified application of the 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,

86/94 can block the 52 closing.

86/94 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, 86/94-1 and 86/94-2, are

different. Therefore, all references made to only 86/94-1 apply to 86/94-2 as well.

The inputs from the protection functions are connected to the TRIP 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 protection relay, for example when starting the breaker failure

86/94 is used for simple three-phase tripping applications.

1MAC059074-MB A

615 series ANSI

Technical Manual

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