Siemens siprotec 7SA522, User Manual

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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
Ph STUB
0.10 A to 25.00 A
1
) (steps 0.01 A)
T
IPh STUB
0.00 s to 30.00 s (steps 0.01 s)
or
∞
(ineffective)
3I
0 STUB
> 0.05 A to 25.00 A
1
) (steps 0.01 A)
T
3I0 STUB
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