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

71
Definite time non-directional overcurrent
protection (TOC)
Chapter 5
Current
2.6 Setting parameters
Path in local HMI: Settings/Functions/Groupn/TimeDelayOC (where n=1-4)
Table 81: Setting parameters for the time delayed phase and residual overcurrent pro-
tection TOC (TOC--) function
2.7 Technical data
Table 82: TOC - Definite time nondirectional overcurrent protection
Parameter Range Default Unit Description
Operation Off, On Off - Operating mode for TOC function
IP> 10-400
Step: 1
100 % of I1b Operating phase overcurrent
tP 0.000-60.000
Step: 0.001
10.000 s Time delay of phase overcurrent function
IN> 10-150
Step:1
100 % of I4b Operating residual current
tN 0.000-60.000
Step: 0.001
10.000 s Time delay of residual overcurrent func-
tion
Function Setting range Accuracy
Operate current Phase measuring ele-
ments, IP>
(10-400) % 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 ele-
ments, IN>
(10-150) % of I4b in
steps of 1 %
± 2.5 % of I
r
at I ≤ I
r
± 2.5 % of I at I >I
r
Time delay Phase measuring ele-
ments
(0.000-60.000) s in
steps of 1 ms
± 0.5 % of t ± 10 ms
Residual measuring ele-
ments
(0.000-60.000) s in
steps of 1 ms
± 0.5 % of t ± 10 ms
Dynamic overreach at τ< 100 ms - < 5 %