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Overcurrent stages
Overcurrent stages
(inverse time acc.
IEC)
Overcurrent stages
(inverse time acc.
ANSI)
7SA6 Manual
C53000-G1176-C156
Pickup values
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
Pickup values
Time factors
Additional time delays
Characteristics
Tolerances
The set times are pure delay times with definite time protection.
1
) Secondary values based on I
Pickup values
I
(phases)
0.10 A to 25.00 A
P
or ∞ (ineffective)
3I
(earth)
0.05 A to 25.00 A
0P
or ∞ (ineffective)
T
(phases) 0.00 s to 30.00 s
IPh>
or ∞ (ineffective)
T
(earth)
0.05 s to 30.00 s
3I0>
or ∞ (ineffective)
approx. 0.95 for I/I
ca. 25 ms
ca. 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
I
(phases)
0.10 A to 4.00 A
P
or ∞ (ineffective)
3I
(earth)
0.05 A to 4.00 A
0P
or ∞ (ineffective)
T
(phases)
0.05 s to 3.00 s
IP
or ∞ (ineffective)
T
(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
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
I
(phases)
0.10 A to 4.00 A
P
or ∞ (ineffective)
3I
(earth)
0.05 A to 4.00 A
0P
or ∞ (ineffective)
Technical Data
1
)
(steps 0.01 A)
1
)
(steps 0.01 A)
(steps 0.01 s)
(steps 0.01 s)
≥ 0.5
N
1
)
(steps 0.01 A)
1
)
(steps 0.01 A)
(steps 0.01 s)
(steps 0.01 s)
(steps 0.01 s)
(steps 0.01 s)
Pick-up
at 1.05 ≤ I/I
≤ 1.15;
P
or 1.05 ≤ I/3I
≤ 1.15
0P
for 2 ≤ I/I
≤ 20
P
/s ≥ 1;
and T
IP
or 2 ≤ I/3I
≤ 20
0P
/s ≥ 1
and T
3I0P
1
)
(steps 0.01 A)
1
)
(steps 0.01 A)
10-31
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