Power-Plant Disconnection Protection
Setting Values
Threshold P1>
50.00 % to 100.00 %
Increments of 0.01 %
Threshold P1<
0.00 % to 60.00 %
Increments of 0.01 %
Threshold Vph-ph<
0.300 V to 175.000 V
Increments of 0.001 V
Threshold I>
1 A @ 100 Irated
0.030 A to 35.000 A
Increments of 0.001 A
5 A @ 100 Irated
0.15 A to 175.00 A
Increments of 0.01 A
1 A @ 50 Irated
0.030 A to 35.000 A
Increments of 0.001 A
5 A @ 50 Irated
0.15 A to 175.00 A
Increments of 0.01 A
1 A @ 1.6 Irated
0.001 A to 1.600 A
Increments of 0.001 A
5 A @ 1.6 Irated
0.005 A to 8.000 A
Increments of 0.001 A
Threshold dP1<
-100.00 % to -30.00 %
Increments of 0.01 %
Dropout delay
0.00 s to 60.00 s
Increments of 0.01 s
Operate delay
0.00 s to 60.00 s
Increments of 0.01 s
Operate curve
2 to 5
Increments of 1
Functional Measured Values
Functional measured values are available to you so that you can better evaluate the behavior of the function.
You can collect these functional measured values in a fault record for example.
Measured
Value
Description
P1(t)
Positive-sequence system active power, which is evaluated by the function. The measured value
is calculated every 1/4 cycle.
dP1(t)
Continuous representation of the active-power change, starting from the trigger time. With this,
you can evaluate the change of the active-power difference at the prefault instant (t
prior
).
dP1(t)max This measured value flows into the characteristic curve. It represents the maximum active power
during the duration of the fault.
Times
Pickup times
Characteristic curve = no
Approx. 28 ms + OOT
66
at 50 Hz
Approx. 25 ms + OOT at 60 Hz
Characteristic curve = yes
Approx. 26 ms + OOT at 50 Hz
Approx. 24 ms + OOT at 60 Hz
Dropout times
Characteristic curve = no
Approx. 18 ms + OOT at 50 Hz
Approx. 19 ms + OOT at 60 Hz
Characteristic curve = yes
Approx. 22 ms + OOT at 50 Hz
Approx. 20 ms + OOT at 60 Hz
Tolerance
I>
1 % of the dropout value or 0.005 I
rated
P1>
0.5 % S
rated
or ±3 % of the setting value when Q < 0.5
S
rated
Vph-ph<
0.5 % of the dropout value or 0.05 V
12.17
66
OOT (Output Operating Time): additional delay of the output medium used
Technical Data
12.17 Power-Plant Disconnection Protection
760
SIPROTEC 5, Paralleling Device, Manual
C53000-H5040-C071-1, Edition 05.2018