Siemens SIPROTEC 7SD610 - Page 346

Technical Data
4.8 Backup Time Overcurrent Protection
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
346
Inverse Time Stages (IEC)
Pickup value Ip>
(phases)
for I
N
= 1 A 0.10 A to 4.00 A
or ∞ (ineffective)
Increment 0.01 A
for I
N
= 5 A 0.50 A to 20.00 A
or ∞ (ineffective)
(earth)
Pickup value3I0p PICKUP
for I
N
= 1 A 0.05 A to 4.00 A
or ∞ (ineffective)
Increment 0.01 A
for I
N
= 5 A 0.25 A to 20.00 A
or ∞ (ineffective)
Time factors T Ip Time Dial
(Phases)
0.05 s to 3.00 s
or ∞ (ineffective)
Increments 0.01 s
T 3I0p TimeDial
(Earth)
0.05 s to 3.00 s
or ∞ (ineffective)
Increments 0.01 s
Additional time delays T Ip Add (Phases) 0.00 s to 30.00 s Increments 0.01 s
T 3I0p Add (Earth) 0.00 s to 30.00 s Increments 0.01 s
Tolerances
Pickup and dropout thresholds I
P
, 3I
0P
3 % of setting value or 1 % of nominal current
Pickup time 2 ≤ I/I
P
≤ 20 and T
IP
≥ 1s
Pickup time 2 ≤ I/3I
0P
≤ 20 and T
3I0P
≥ 1s
5 % of setting value or ± 15 ms
5 % of setting value or ± 15 ms
Defined times 1 % of setting value or 10 ms
Pickup value Ip> Dir.I
(directional phases)
for I
N
= 1 A 0.10 A to 4.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.50 A to 20.00 A
or ∞ (disabled)
Pickup threshold3I0p Dir.
(Earth directional)
for I
N
= 1 A 0.05 A to 4.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.25 A to 20.00 A
or ∞ (disabled)
Time factors
(directional stages)
T Ip Dir.
(Phases)
0.05 s to 3.00 s
or ∞ (ineffective)
Increments 0.01 s
T 3I0p Dir. (Earth) 0.05 s to 3.00 s
or ∞ (ineffective)
Increments 0.01 s
Additional time delays
(directional stages)
T Ip Add Dir.
(Phases)
0.00 s to 30.00 s Increments 0.01 s
T 3I0p Add Dir.
(Earth)
0.00 s to 30.00 s Increments 0.01 s
Tolerances (directional stages)
Pickup and dropout thresholds I
PDir
, 3I
0PDir
3 % of setting value or 1 % of nominal current
Pickup time 2 ≤ I/I
PDir
≤ 20 and T
IPDir
≥ 1s
Pickup time 2 ≤ I/3I
0PDir
≤ 20 and T
3I0PDir
≥ 1s
5 % of setting value or ± 15 ms
5 % of setting value or ± 15 ms
Defined times 1 % of setting value or 10 ms
Characteristics See Figure 4-2
Defined times 1 % of setting value or 10 ms