ABB RELION SMU615 Technical Manual page 130

Protection related functions
Figure 83: Functional module diagram
Timer
The duration of the TRIP output signal from TRPPTRC can be adjusted with the
Trip pulse time setting when the "Non-latched" operation mode is used. The pulse
length should be long enough to secure the opening of the breaker. For three-pole
tripping, TRPPTRC has a single input OPERATE, through which all trip output signals
are routed from the protection functions within the merging unit, or from external
protection functions via one or more of the merging unit's binary inputs. The
function has a single trip output TRIP for connecting the function to one or more
of the merging unit's binary outputs, and also to other functions within the merging
unit requiring this signal.
The BLOCK input blocks the TRIP output and resets the timer.
Lockout logic
TRPPTRC 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 be done similarly as when using the
"Lockout" mode. It is also possible to reset the "Latched" mode remotely through a
separate communication parameter.
The CL_LKOUT and TRIP outputs can be blocked with the BLOCK input.
Table 163: Operation modes for the TRPPTRC trip output
Mode
Non-latched
Latched
Lockout
130
The minimum pulse trip function is not active when using the "Lockout"
or "Latched" modes but only when the "Non-latched" mode is selected.
Operation
The Trip pulse length parameter gives the minimum pulse length
for
TRIP
is latched ; both local and remote clearing is possible.
TRIP
is locked and can be cleared only locally via menu or the
TRIP
RST_LKOUT
input.
1MRS758407 C
SMU615
Technical Manual