ABB RELION REX640 Technical Manual page 465

1MRS759142 F
Table 536: Reset time characteristics supported by different stages
Reset curve type
(1) Immediate
(2) Def time reset
(3) Inverse reset
4.2.2.9 Directional earth-fault characteristics
Phase angle characteristic
The operation criterion phase angle is selected with the
using the value "Phase angle".
When the phase angle criterion is used, the DIRECTION output indicates on which
operating sector the operating quantity is measured. The FAULT_DIR output
indicates in which operation sector the fault current is measured. The output is
operational once the function is started.
The forward and reverse sectors are defined separately. The forward operation area
is limited with the
operation area is limited with the
In the forward operation area, the
sector and the
sector, measured from the
In the reverse operation area, the
sector and the
sector, measured from the complement of the
degrees phase shift) .
The relay characteristic angle (RCA) is set to positive if the operating current lags
the polarizing quantity. It is set to negative if it leads the polarizing quantity.
REX640
Technical Manual
DEFLPDEF
x
x
x
Min forward angle and Max forward angle settings. The reverse
The sector limits are always given as positive degree values.
Min forward angle setting correspondingly the counterclockwise
Characteristic angle setting.
Min reverse angle setting correspondingly the counterclockwise
DEFHPDEF Note
x Available for all operate time curves
x Available for all operate time curves
x Available only for ANSI and user pro-
grammable curves
Min reverse angle and Max reverse angle settings.
Max forward angle setting gives the clockwise
Max reverse angle setting gives the clockwise
Characteristic angle setting (180
Protection functions
Operation mode setting
465