AngleRCA
Forward
Area
Iop = I2
Upol=-U2
Reverse
Area
IEC10000031-1-en.vsd
IEC10000031 V1 EN-US
Figure 98: Relay characteristic angle given in degree
In a transmission network a normal value of RCA is about 80°.
UPolMin
: Minimum polarization (reference) voltage % of
UBase
.
I>Dir
: Operate residual current level for directional comparison scheme. The setting is given in
% of
IBase
. The start forward or start reverse signals can be used in a communication scheme.
The appropriate signal must be configured to the communication scheme block.
7.5 Thermal overload protection, two time constants
TRPTTR
IP14513-1 v4
7.5.1 Identification
M14877-1 v2
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Thermal overload protection, two
time constants
TRPTTR
SYMBOL-A V1 EN-US
49
Section 7 1MRK 505 370-UEN D
Current protection
170 Busbar protection REB670
Application manual
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