ABB Remote I/O RIO600 Installation And Commissioning Manual page 136

Section 6
Commissioning
128
When Operating Quantity is set to "Amplitude", settings Min Forward Operate
Current and Min Reverse Operate Current are compared to the amplitude of
the whole defined operate sector (see
unearthed networks.
REVERSE
REVERSE
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
IR is the total resistive earth-fault current of the network corresponding to the
tot
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
Figure 74). This selection can be used in
+90 deg
Im(Ȳo)
❷
Ȳ
osum_CPS
Ȳ
osum_CPS
❶
Tilt
angle
-90 deg
1MRS757488 H
+45 deg
FORWARD
Re(Ȳo)
Ȳ
osum_CPS
❸
FORWARD
Ȳ
osum_CPS
❹
.
tot
Installation and Commissioning Manual
1
I
in
0
stab
0 deg
RIO600