TECHNICAL DATA
23
NA30 - Manual - 04 - 2022
3.8 CONTROL AND MONITORING
Second harmonic restraint - 2ndh-REST
Second harmonic restraint threshold (
I
2ndh
>)
10...50 % (step 1 %)
I
2ndh
> reset time delay (
t
2ndh>RES)
0...100.0
s
0.00...9.99 s (step 0.01 s)
10.0...100.0 s (step 0.1 s)
Pickup accuracy
I
2ndh
> ±
4% ±
1%
I
n
Operate
time
accuracy
5%
or
±
10 ms
Trip Circuit Supervision - 74TCS
Operate time:
• One binary input supervision
40 s
• Two binary inputs supervision
2 s
Reset time delay:
• One binary input supervision
6 s
• Two binary inputs supervision
0.6 s
Selective block - BLOCK2
Selective block IN:
• BLIN1 Selective block operating mode (
ModeBLIN1
)
OFF-ON IPh/IE-ON IPh-ON IE
• BLIN maximum activation time for phase protections (
t
B-IPh)
0.10...10.00 s (step 0.01 s)
• BLIN maximum activation time for ground protections (
t
B-IE)
0.10...10.00 s (step 0.01 s)
Selective block OUT:
• BLOUT1 Selective block operating mode (
ModeBLOUT1
)
OFF-ON IPh/IE-ON IPh-ON IE
• BLOUT Dropout time for phase protections (
t
F-IPh
)
0.00...1.00 s (step 0.01 s)
• BLOUT Dropout time for ground protections (
t
F-IE
)
0.00...1.00 s (step 0.01 s)
• BLOUT Dropout time for ground and phase protections (
t
F-IPh/IE
) 0.00...1.00 s (step 0.01 s)
Internal selective block - BLOCK4
Output internal selective block dropout time for phase protections (
t
FI-IPh
)
0.00...10.00
s (step 0.01 s)
Output internal selective block dropout time for ground protections (
t
FI-IE
)
0.00...10.00
s
(step
0.01
s)
Circuit Breaker supervision
Circuit breaker diagnostic
Number of CB trips threshold (
N.Open
)
0...10000
(step 1)
Cumulative CB tripping currents threshold (
SumI
) 0....5000
I
n
(step 1
I
n
)
Cumulative CB tripping I
2
t threshold (
SumI^2t
)
0....5000 (
I
n
)
2
∙s
(step 1
I
n2
∙s)
Circuit Breaker opening time for I^2t calculation (
t
break
)
0.05...1.00 s (step 0.01 s)
Circuit Breaker maximum allowed opening time (
t
break
>)
0.05...1.00 s (step 0.01 s)
CT supervision - 74CT
74CT Threshold (
S<)
0.10...0.95
(step 0.01)
74CT Overcurrent threshold (
I
*
)
0.10...1.00
I
n
(step 0.01
I
n
)
S<
Operating time delay (
t
S
<)
0.03...200
s
0.03...9.99 s (step 0.01 s)
10.0...99.9 s (step 0.1 s)
100...200 s (step 1 s)
Dropout ratio for the
I
*
pickup
0.95...0.98
Dropout time
≤
0.05 s
Pickup accuracy
S<
± 1% with 0.1
I
n
, ± 0.5% with 1
I
n
Pickup accuracy
I
*
± 0.5% with 0.1
I
n
, ± 0.2% with 1
I
n
Operate
time
accuracy
5%
or
±
10 ms
Pilot wire diagnostic
• BLOUT1 Diagnostic pulse period (
PulseBLOUT1)
OFF-0.1-1-5-10-60-120 s
• BLIN1 Diagnostic pulse control time interval (
PulseBLIN1)
OFF-0.1-1-5-10-60-120 s
Demand measures
• Fix on demand period (
t
FIX)
1...60 min (step 1 min)
• Rolling on demand period (
t
ROL)
1...60 min (step 1 min)
• Number of cycles for rolling on demand (
N.
ROL)
1...24 (step 1)
