ABB REL 551-C1*2.5 - Setting Parameters; Technical Data

67
Instantaneous non-directional overcurrent
protection (IOC)
Chapter 5
Current
Table 76: Output signals for the IOC (IOC--) function block
1.6 Setting parameters
Path in local HMI: Settings/Functions/Groupn/InstantOC (where n=1-4)
Table 77: Setting parameters for the instantaneous phase and residual overcurrent pro-
tection IOC (IOC--) (non-dir.) function
1.7 Technical data
Table 78: IOC - Instantaneous overcurrent protection
Signal Description
TRIP Trip by instantaneous overcurrent function.
TRP Trip by instantaneous phase overcurrent function when included
TRL1 Trip by instantaneous overcurrent function, phase L1 when single pole
tripping is included
TRL2 Trip by instantaneous overcurrent function, phase L2 when single pole
tripping is included
TRL3 Trip by instantaneous overcurrent function, phase L3 when single pole
tripping is included
TRN Trip by the instantaneous residual overcurrent function when included
Parameter Range Default Unit Description
Operation Off, On Off - Operating mode for the IOC function
IP>> 50-2000
Step: 1
100 % of I1b Operating phase current
IN>> 50-2000
Step: 1
100 % of I1b Operating residual current
Function Setting range Operate time Accuracy
Operate current
I>>
Phase measuring
elements
(50-2000)% of I1b In
steps of 1%
- ± 2.5 % of I
r
at I ≤I
r
± 2.5 % of I at I > I
r
-Residual measuring
elements
(50-2000)% of I1b In
steps of 1%
± 2.5 % of I
r
at I ≤ I
r
± 2.5 % of I at I > I
r
Maximum operate time at I > 10 × I
set
Max. 15ms -
Dynamic overreach at τ< 100 ms - < 5%