ABB REG670 - Technical Data

Direction
Element
4 step over current
element
One element for each
step
Harmonic
Restraint
Mode
Selection
earthFaultDirection
harmRestrBlock
enableDir
enableStep
1-4
DirectionalMode
1-4
TRIP
Element
enableDir
angleValid
Directional Check
operatingCurrent
SwitchOnToFault
start step 2, 3 and 4
signal to
communication
scheme
TRIP
3U0
3I0
Blocking at parallel
transformers
1
CB
pos
or cmd
Element
3I0
DirMode
DirMode
INPol
IEC06000376-2-en.vsd
I3PDIR
IEC06000376 V3 EN
Figure 169: Functional overview of EF4PTOC
8.4.8 Technical data
Table 178: EF4PTOC technical data
Function
Range or value Accuracy
Operate current (1-2500)% of lBase ± 1.0% of I
r
at I < I
r
± 1.0% of I at I > I
r
Reset ratio > 95% at (1-2500)% of lBase -
Operate current for directional
comparison
(1–100)% of lBase For RCA ± 60 degrees:
± 2.5% of I
r
at I ≤ I
r
± 2.5% of I < I
r
Independent time delay for step
1, 2, 3, and 4
(0.000-60.000) s ± 0.2% or ± 35 ms whichever is
greater at 0 to 2 x I
set
Inverse characteristics, see table
959, table 960 and table 961
18 curve types See table 959, table 960 and table
961
Second harmonic restrain
operation
(5–100)% of fundamental ± 2.0% of I
r
Relay characteristic angle (-180 to 180) degrees ± 2.0 degrees
Minimum polarizing voltage (1–100)% of UBase ± 0.5% of U
r
Minimum polarizing current (2-100)% of IBase ± 1.0% of I
r
Table continues on next page
1MRK502052-UEN B Section 8
Current protection
373
Technical manual