Q6Z0118A
Parameter
set 1
set 2
set 3
set 4
DTOC1:
Enable PSx
076 050
077 050
078 050
079 050
DTOC1:
Enabled
[ 035 102 ]
DTOC1:
Enable PSx
[ * ]
1
0
0: No
1: Yes
0
0: No
1: Yes
DTOC1:
General enable USER
[ 031 135 ]
1
Fig. 3-91: Enabling or disabling DTOC protection
3.22.2 Phase Current Stages
The three phase currents are monitored by the P631 with three-stage functions
to detect when they exceed the set thresholds. One of two different threshold
types can be active. The “dynamic” thresholds are active for the set hold time for
the “dynamic parameters” (see Section 3.12.5, (p. 3-76)) and the “normal”
thresholds are active when no hold time is running. If the current exceeds the set
thresholds in one phase, timer stages are started. Once the time delays have
elapsed, a trip signal is issued. The timer stages can be blocked by appropriately
configured binary signal inputs.
The first stage of the DTOC protection function can optionally be blocked by the
inrush stabilization function of differential protection.
P631
3 Operation
3-124 P631/EN M/R-11-C // P631-310-650
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