Technical Data - ABB REL 501-C1 2.5 Technical Reference Manual

7.7
102
Current reversal and weak-end infeed logic
(ZCAL)
Table 109: Setting parameters for the current reversal and weak end infeed logic ZCAL
(ZCAL-) 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
tWEI 0.000 -
60.000
Step: 0.001
UPN< 10 - 100
Step: 1
UPP< 20 - 170
Step: 1

Technical data

Table 110: ZCAL - Current reversal and weak end infeed logic
Parameter
Pickup time for current reversal,
tPickUp
Delay time for current reversal,
tDelay
Coordination time for weak end
infeed logic, tWEI
Detection level phase to neu-
tral voltage, UPN<
Detection level phase to phase
voltage, UPP<
Default Unit
Off -
0.000 s
0.100 s
Off -
0.010 s
70 % of U1b
70 % of U1b
Setting range
0.000-60.000 s in steps of 0.001s
0.000-60.000 s in steps of 0.001s
0.000-60.000 s in steps of 0.001s
10-100% of U1b
20-170% of U1b
Line distance
Description
Operating mode for the ZCAL function
Pickup time for current reversal function
Output hold time for current reversal func-
tion
Operating mode for the WEI function
Coordination time for the WEI function
Under voltage detection - ph-N measure-
ment
Under voltage detection - ph-ph measure-
ment
Accuracy
± 0.5% ± 10ms
± 0.5% ± 10ms
± 0.5% ± 10ms
± 2.5% of U
r
± 2.5% of U at U ≤ U
r r
± 2.5% of U at U>U
r
Chapter 4