ABB REB670 - Common Settings for All Steps

7.4.3.2 Common settings for all steps
GUID-A00A942B-E760-42EE-8FEB-F723426783F3 v1
x means step 1, 2, 3 and 4.
AngleRCA: Relay characteristic angle given in degrees. This angle is defined as shown
in figure 99. The angle is defined positive when the residual current lags the reference
voltage (Vpol = -)
AngleRCA
Forward
Area
Iop = I2
Vpol=-V2
Reverse
Area
ANSI10000031-1-en.vsd
ANSI10000031 V1 EN-US
Figure 99: 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.
Section 7 1MRK 505 370-UUS A
Current protection
210 Busbar protection REB670 2.2 ANSI
Application manual