ABB REL670 2.2 IEC - Sensitive Directional Residual Overcurrent and Power Protection SDEPSDE

AngleRCA
Forward
Area
Iop = I2
Upol=-U2
Reverse
Area
IEC10000031-1-en.vsd
IEC10000031 V1 EN-US
Figure 272: 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.
9.6 Sensitive directional residual overcurrent and power
protection SDEPSDE
SEMOD171436-1 v4
Section 9 1MRK 506 369-UEN B
Current protection
494 Line distance protection REL670 2.2 IEC
Application manual