A070882-ANSI V2 EN
Figure 395:
Functional module diagram
Timer
The duration of the
TRIP
output signal from 86/94 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, 86/94 has a
single 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
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 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 minimum pulse trip function is not active when using the "Lockout"
or "Latched" modes but only when the "Non-latched" mode is selected.
The
CL_LKOUT
and
TRIP
outputs can be blocked with the
BLOCK
input.
Table 684:
Operation modes for the 86/94 trip output
Mode
Operation
Non-latched
The
Trip pulse length parameter gives the minimum
pulse length for
TRIP
Latched
TRIP
is latched ; both local and remote clearing is
possible.
Lockout
TRIP
is locked and can be cleared only locally via
menu or the
RST_LKOUT
input.
1MAC059074-MB A
Section 5
Protection related functions
615 series ANSI
785
Technical Manual
Summary of Contents for Relion 615 series
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