ABB RELION 620 Series Technical Manual page 650

Section 4
Protection functions
644
Table 592: Reset time functionality when IDMT operation time curve selected
Reset functionality
Instantaneous Operation timer is
reset "Reset
instantaneously"
when drop-off
occurs
Frozen timer Operation timer is
frozen during
drop-off
Linear decrease Operation timer
value linearly
decreases during
the drop-off
situation
Setting Type of Setting Type of time
reset curve reset
"Immediate" Setting has no
effect
"Def time reset" "Freeze Op timer"
"Def time reset" "Decrease Op
timer"
1MRS757644 F
Setting Reset delay
time
Setting has no
effect
Operate timer is
reset after the set
Reset delay time
has elapsed
Operate timer is
reset after the set
Reset delay time
has elapsed
620 series
Technical Manual