Siemens siprotec 7SA522 - Page 538

Technical Data
10-22 7SA522 Manual
C53000-G1176-C119-2
D
3I0P
(earth) 0.50 s to 15.00 s (steps 0.01 s)
or ∞ (ineffective)
T
3I0Padd
(earth) 0.00 s to 30.00 s (steps 0.01 s)
Tolerances currents 3 % of set value or 1% of nominal current
with definite time times 1 % of set value or 10 ms
Tolerances currents Pick-up at 1.05 ≤ I/I
P
≤ 1.15;
or 1.05 ≤ I/3I
0P
≤ 1.15
with inverse time (IEC) times 5 % ± 15 ms for 2 ≤ I/I
P
≤ 20
and T
IP
/s ≥ 1;
or 2 ≤ I/3I
0P
≤ 20
and T
3I0P
/s ≥ 1
with inverse time (ANSI) times 5 % ± 15 ms for 2 ≤ I/I
P
≤ 20
and D
IP
/s ≥ 1;
or 2 ≤ I/3I
0P
≤ 20
and D
3I0P
/s ≥ 1
The set times are pure delay times with definite time protection.
1
) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied with 5.
Stub Protection Overcurrent stage I
PhSTUB
0.10 A to 25.00 A
1
) (steps 0.01 A)
T
IPhSTUB
0.00 s to 30.00 s (steps 0.01 s)
or ∞ (ineffective)
3I
0STUB
> 0.05 A to 25.00 A
1
) (steps 0.01 A)
T
3I0STUB
0.00 s to 30.00 s (steps 0.01 s)
or ∞ (ineffective)
Tolerances currents 3 % of set value or 1% of nominal current
times 1 % of set value or 10 ms
The set times are pure delay times.
1
) Secondary values based on I
N
= 1 A; for I
N
= 5 A they must be multiplied with 5.
Drop-off to Pick-up
Ratios
Current stages approx. 0.95 for I
P
/I
N
≥ 0.5