ABB RELION 620 Series Technical Manual page 548

Section 5
Protection-related functions
5.3.5
542
input TRIP, through which all trip output signals are routed from the protection functions
within the protection relay, or from external protection functions via one or more of the
protection relay's binary inputs. The function has a single trip output TRIP for connecting
the function to one or more of the protection relay's binary outputs, and also to other
functions within the protection relay requiring this signal.
The BLOCK input blocks the TRIP output and resets the timer.
Lockout logic
The CL_LKOUT and TRIP outputs can be blocked with the BLOCK input.
Table 395: Operation modes for the 86/94 trip output
Mode
Non-latched
Latched
Lockout
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.
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 TRIP
output is connected to the digital 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
protection.
86/94 is used for simple three-phase tripping applications.
Operation
Trip pulse length parameter gives the minimum
The
pulse length for TRIP
TRIP is latched ; both local and remote clearing is
possible.
TRIP is locked and can be cleared only locally via
menu or the RST_LKOUT input.
1MAC504801-IB E
620 series ANSI
Technical Manual