23
NA11 - Manual - 02 - 2009
TECHNICAL DATA
3.8 CONTROL AND MONITORING
Automatic reclosing (79)
Number of delayed reclosures 0...5
Rapid reclosure dead time t
rdt
0.1...60 s
0.0...19.9 s step 0.1 s,
20..60 s step 1 s
Slow reclosure dead time t
rdt
1...200 s (step 1 s)
Reclaim time t
r
1...200 s (step 1 s)
Slow reclosure fault discrimination time t
d1
0...10 s (step 1 s)
Delayed reclosure fault discrimination time t
d2
0...10 s (step 1 s)
Manual close (R+S only) fault discrimination time t
d
1...10 s (step 1 s)
Second harmonic restraint - 2ndh-REST
Second harmonic restraint threshold (I
2ndh
>) 10...50 %
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)
Dropout ratio 0.95...0.98
Dropout time ≤ 0.04 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...10.00 s (step 0.01 s)
Circuit Breaker monitoring
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
n
)
2
∙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 ≤ 0.04 s
Pickup accuracy S< ± 4%
Pickup accuracy I
*
± 3% ± 0.5% 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)
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