Input And Output Signals; Setting Parameters - ABB REL 501-C1 2.5 Technical Reference Manual

5.5
5.6
Current reversal and weak end infeed logic for
residual overcurrent protection (EFCA)

Input and output signals

Table 127: Input signals for the EFCA (EFCA-) function block
Signal
BLOCK
IRV
IRVBLK
WEIBLK
CRL
CBOPEN
Path in local HMI: ServiceReport/Functions/EarthFault/ComIRevWeiEF/FuncOutputs
Table 128: Output signals for the EFCA (EFCA-) function block
Signal
TRWEI
IRVL
ECHO

Setting parameters

Path in local HMI: Settings/Functions/Groupn/EarthFault/ComIRevWeiEF
Table 129: Setting parameters for the current reversal and weak end infeed logic for re-
sidual overcurrent protection EFCA (EFCA-) function
Parameter Range
CurrRev Off, On
tPickUp 0.000-60.000
Step: 0.001
tDelay 0.000-60.000
Step: 0.001
WEI Off, Trip,
Echo
U> 5-70
Step: 1
Description
Blocking of function
Activation of current reversal logic
Blocking of current reversal logic
Blocking of weak end infeed logic
Carrier received for weak end infeed logic
Blocking of trip when breaker is open
Description
Trip by weak end infeed logic
Operation of current reversal logic
Carrier send by weak end infeed logic
Default Unit Description
Off - Operating mode for current reversal logic
0.000 s Current reversal pickup timer
0.100 s Current reversal delay timer
Off - Operating mode of weak end infeed logic
25 % of U1b Operate phase voltage for WEI trip
Chapter 5
Current
121