1MAC050144-MB C
Section 5
Protection related functions
615 series ANSI
397
Technical Manual
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 52 closing.
The 86/94 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, 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
CB TRIP
output is connected to the digital 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.
86/94 is used for simple three-phase tripping applications.
Figure 195:
Typical 86/94 connection
Lock-out
86/94 is provided with possibilities to activate a lockout. When activated, the lockout can
be manually reset after checking the primary fault by activating the RST_LKOUT input or
from the LHMI clear menu parameter. When using the “Latched” mode, the resetting of
the TRIP output can done similarly as when using the “Lockout” mode. It is also possible
to reset the “Latched” mode remotely through a separate communication parameter.
The minimum pulse trip pulse function is not active when using the
“Lockout” or “Latched” modes but only when the “Non-latched” mode is
selected.
Содержание 615 Series ANSI
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