When
Operating Quantity
is set to "Amplitude", settings
Min Forward Operate
Current
and
Min Reverse Operate Current
are compared to the amplitude of
I
stab
0
1
in
the whole defined operate sector (see
). This selection can be used in
unearthed networks.
Tilt
angle
-90 deg
+90 deg
+45 deg
Im(
Ȳ
o)
0 deg
Re(
Ȳ
o)
REVERSE
REVERSE
Ȳ
osum_CPS
❶
❷
Ȳ
osum_CPS
FORWARD
Ȳ
osum_CPS
❸
FORWARD
Ȳ
osum_CPS
❹
GUID-7B471332-D476-47A3-B37B-C147835657CA V1 EN
Figure 74:
Illustration of amplitude and resistive current sectors when
directional mode is set to "Forward" and setting operating quantity =
"Amplitude"
If the “Adaptive” or “Resistive” operating quantity is selected, setting
Min Forward
Operate Current
should be set to a value less than p
⋅
IR
tot
.
IR
tot
is the total resistive earth-fault current of the network corresponding to the
resistive current of the parallel resistor of the coil and the network losses of the system
(typically in order of 1…5% of the total capacitive earth-fault current of the network).
p is the security factor (0.5…0.7).
This setting should be set based on the total resistive earth-fault current of the network
including the parallel resistor of the coil and the network losses. It must be set to a
Section 6
1MRS757488 H
Commissioning
128
RIO600
Installation and Commissioning Manual
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