Siemens siprotec 7SA6 User Manual page 655

Stub Protection
7SA6 Manual
C53000-G1176-C133-1
Time factors
Additional time delays
Characteristics
Tolerances
The set times are pure delay times with definite time protection.
1
) Secondary values based on I
Pick-up values I
PhSTUB
3I
0STUB
T
3I0 STUB
Time delays
Drop-off to pick-up ratio
Pick-up time
Drop-off time
Tolerances
The set times are pure delay times.
1
) Secondary values based on I
D (phases) 0.05 s to 3.00 s
IP
or ∞ (ineffective)
D (earth) 0.05 s to 3.00 s
3I0P
or ∞ (ineffective)
T (phases.)0.00 s to 30.00 s
IPadd
T (earth) 0.00 s to 30.00 s
3I0Padd
see Figure 10-1 (in Section 10.5)
currents Pick-up
times 5 % ± 15 ms
def. times 1 % of set value or 10 ms
= 1 A; for I = 5 A they must be multiplied by 5.
N N
(phases) 0.10 A to 25.00 A
or ∞ (ineffective)
> (earth) 0.05 A to 25.00 A
0.00 s to 30.00 s
or ∞ (ineffective)
T 0.00 s to 30.00 s
IPh>>>
or ∞ (ineffective)
T 0.00 s to 30.00 s
3I0 >>>
or ∞ (ineffective)
approx. 0.95 for I/I
approx. 25 ms
approx. 30 ms
currents 3 % of set value or 1% nominal current
times 1 % of set value or 10 ms
= 1 A; for I = 5 A they must be multiplied by 5.
N N
Technical Data
(steps 0.01 s)
(steps 0.01 s)
(steps 0.01 s)
(steps 0.01 s)
1.05 ≤ I/I ≤ 1.15;
at
P
1.05 ≤ I/3I ≤ 1.15
or
0P
for 2 ≤ I/I ≤ 20
P
/s ≥ 1;
and D
IP
or 2 ≤ I/3I ≤ 20
0P
/s ≥ 1
and T
3I0P
1
) (steps 0.01 A)
1
) (steps 0.01 A)
(steps 0.01 s)
(steps 0.01 s)
(steps 0.01 s)
≥ 0.5
N
10-27