AngleRCA
Forward
Area
Iop = I2
Vpol=-V2
Reverse
Area
ANSI10000031-1-en.vsd
ANSI10000031 V1 EN-US
Figure 78: 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.
8.6 Sensitive directional residual overcurrent and power
protection SDEPSDE (67N)
SEMOD171436-1 v4
Section 8 1MRK 511 401-UUS A
Current protection
190 Bay control REC670 2.2 ANSI
Application manual
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