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General Trip
Reset of the
Trip Command
TRIP L1
from Figure 6-151
L1 open
TRIP L2
from Figure 6-151
L2 open
TRIP L3
from Figure 6-151
L3 open
7SA6 Manual
C53000-G1176-C156-2
All trip signals from the protection functions are combined with an OR function and
cause the alarm " Relay TRIP ". This can be allocated to LED or output relay.
Once a trip command is initiated, it is phase segregatedly latched (in the event of
three-pole tripping for each of the three poles) (refer to Figure 6-152). At the same time
a minimum trip command duration TMin TRIP CMD is started. This ensures that the
trip command is output for a sufficiently long time to the circuit breaker even if the trip-
ping protection function resets very rapidly. Only after the last protection function has
reset (no function is picked up any more) AND the minimum trip command duration
has expired, the trip commands can reset.
A further condition for the reset of the trip command is that the circuit breaker has
opened, in the event of single-pole tripping the relevant circuit-breaker pole. In the
function control of the device this is checked by means of the circuit-breaker position
feedback (Subsection 6.22.2) and the current flow.
The residual current PoleOpenCurrent that is certainly undershot when the circuit
breaker pole is open is set in address 1130A . Address 1135 Reset Trip CMD de-
termines under which conditions a trip command is reset. If CurrentOpenPole is
set, the trip command is reset as soon as the current disappears. It is important that
the value set in address 1130A PoleOpenCurrent (see above) is undershot. If Cur-
rent AND CB is set, the circuit-breaker auxiliary contact must send a message that
the circuit breaker is open. It is a prerequisite for this setting that the position of the
auxiliary contacts is allocated via a binary input.
Pole Open Current
1130
I
L1
I
L2
I
L3
TMin TRIP CMD
≥1
Figure 6-152 Latching and reset of the trip command
1135
Reset Trip CMD
only I<
CBaux and I<
Pole Open Current <
with CBaux and
Pole Open Current <
Pole Open Current
with CBaux and
Pole Open Current <
Pole Open Current
with CBaux and
Pole Open Current <
&
0240
T
Functions
FNr 507
S
Q
Relay TRIP L1
R
&
FNr 508
S
Q
Relay TRIP L2
R
&
FNr 509
S
Q
Relay TRIP L3
R
&
6-299
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