ABB RELION 670 Series Applications Manual page 154

Section 7
Current protection
7.1.3.1 Settings for each step
DirModeSelx : The directional mode of step x . Possible settings are Disabled / Non-directional /
Forward / Reverse .
Characteristx : Selection of time characteristic for step x . Definite time delay and different types of
inverse time characteristics are available according to Table 26.
Table 26: Inverse time characteristics
Curve name
ANSI Extremely Inverse
ANSI Very Inverse
ANSI Normal Inverse
ANSI Moderately Inverse
ANSI/IEEE Definite time
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
IEC Normal Inverse
IEC Very Inverse
IEC Inverse
IEC Extremely Inverse
IEC Short Time Inverse
IEC Long Time Inverse
IEC Definite Time
User Programmable
ASEA RI
RXIDG or RD (logarithmic)
The different characteristics are described in
Pickupx : Operate phase current level for step x given in % of IB .
Ix>MaxEd2Set and Ix>MinEd2Set should only be changed if remote setting of operation current
Ix> , is used. The limits are used for decreasing the used range of the Ix> setting. If Ix> is set
level,
outside
Ix>MaxEd2Set is smaller than Ix>MinEd2Set , the limits are swapped.
tx : Definite time delay for step x . The definite time tx is added to the inverse time when inverse
time characteristic is selected. Note that the value set is the time between activation of the start
and the trip outputs.
TDx : Time multiplier for inverse time delay for step x .
148
x means step 1, 2, 3 and 4.
Ix>MaxEd2Set and Ix>MinEd2Set , the closest of the limits to Ix> is used by the function. If
Technical manual .
1MRK 505 337-UUS A
M12982-19 v10.1.1
Application manual