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GUID-94CC2B30-D7CC-4CB0-AB7C-C6261C641D37 V1 EN
Figure 343:
Defined zones
The impedance is continuously monitored for detecting an out of step condition. When the
impedance enters inside from the outer blinder, the out of step detection timer is triggered.
If impedance remains between outer and inner blinder for the duration of the
Swing time
setting, output
SWING
is activated. If the impedance enters the mho circle in zone 1, out
of step blocking (OSB) for zone 1 is detected and output
OSB
is activated, or if the
impedance enters the mho circle in zone 2, OSB for zone 2 is detected and output
OSB_Z2
is activated if setting
Zone 2 enable
is set to “Yes”. Both
OSB
and
OSB_Z2
can be
activated if the impedance passes through zone 1 and zone 2 while inside the mho circle.
The
OSB
or
OSB_Z2
output deactivates when impedance exits and remains outside the
mho circle and the inner blinder for a duration of five cycles.
Activation of the
TRIP
output depends on the
Oos trip mode
selected. The options
available are “Way in”, “Way out”, and “Adaptive”. If the “Way in” option is selected, the
function triggers the delay timer after detecting an OSB condition. When the set
Trip delay
time
has elapsed, the
TRIP
output is activated. When using the “Way in” option, the zone-
related settings and zone slip counters are not applicable.
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
689
Technical Manual
Содержание Relion 615 series
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