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1.6
1.7
Instantaneous non-directional overcurrent
protection (IOC)
Table 112: Output signals for the IOC (IOC--) function block
Signal
TRIP
TRP
TRL1
TRL2
TRL3
TRN
Setting parameters
Path in local HMI: Settings/Functions/Groupn/InstantOC (where n=1-4)
Table 113: Setting parameters for the instantaneous phase and residual overcurrent pro-
tection IOC (IOC--) (non-dir.) function
Parameter
Range
Operation
Off, On
IP>>
50-2000
Step: 1
IN>>
50-2000
Step: 1
Technical data
Table 114: IOC - Instantaneous overcurrent protection
Function
Operate current
Phase measuring
I>>
elements
Residual measuring
elements
Maximum operate time at I > 10 × I
Dynamic overreach at τ < 100 ms
Description
Trip by instantaneous overcurrent function.
Trip by instantaneous phase overcurrent function when included
Trip by instantaneous overcurrent function, phase L1 when single pole
tripping is included
Trip by instantaneous overcurrent function, phase L2 when single pole
tripping is included
Trip by instantaneous overcurrent function, phase L3 when single pole
tripping is included
Trip by the instantaneous residual overcurrent function when included
Default
Unit
Description
Off
-
Operating mode for the IOC function
100
% of I1b
Operating phase current
100
% of I1b
Operating residual current
Setting range
(50-2000)% of I1b In
steps of 1%
(50-2000)% of I1b In
steps of 1%
set
Chapter 5
Operate time Accuracy
± 2.5 % of I
at I ≤ I
-
r
± 2.5 % of I at I > I
± 2.5 % of I
at I ≤ I
-
r
± 2.5 % of I at I > I
Max. 15ms
-
-
< 5%
Current
r
r
r
r
107
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