AngleRCA
Forward
Area
Iop = I2
Vpol=-V2
Reverse
Area
ANSI10000031-1-en.vsd
ANSI10000031 V1 EN-US
Figure 276:
Relay characteristic angle given in degree
In a transmission network a normal value of RCA is about 80°.
VPolMin
: Minimum polarization (reference) voltage % of
VBase
.
I>Dir
: Operate residual current level for directional comparison scheme. The setting is
given in % of
IBase
. The pickup forward or pickup reverse signals can be used in a
communication scheme. The appropriate signal must be configured to the
communication scheme block.
9.6
Sensitive directional residual overcurrent and power
protection SDEPSDE (67N)
SEMOD171436-1 v4
1MRK 504 163-UUS A
Section 9
Current protection
Transformer protection RET670 2.2 ANSI
555
Application manual
Summary of Contents for RELION RET670
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