Sensitive Directional Residual Overcurrent And Power Protection Sdepsde - ABB REG670 Applications Manual

Section 9
Current protection
9.6
356
Reverse
Area
IEC10000031 V1 EN
Figure 188: 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.
Sensitive directional residual overcurrent and power
protection SDEPSDE
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
AngleRCA
Forward
Area
Iop = I2
1MRK 502 071-UEN -
Upol=-U2
IEC10000031-1-en.vsd
Application manual