Siemens SIPROTEC 7SD610 - Page 345

Technical Data
4.8 Backup Time Overcurrent Protection
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
345
Overcurrent Stages
Pickup value Iph>
(phases)
for I
N
= 1 A 0.10 A to 25.00 A
or ∞ (ineffective)
Increment 0.01 A
for I
N
= 5 A 0.50 A to 125.00 A
or ∞ (ineffective)
Pickup value 3I0>
(earth)
for I
N
= 1 A 0.05 A to 25.00 A
or ∞ (ineffective)
Increment 0.01 A
for I
N
= 5 A 0.25 A to 125.00 A
or ∞ (ineffective)
Delays T Iph> 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
T 3I0> 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Pickup value Iph> STUB
(phases)
for I
N
= 1 A 0.10 A to 25.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.50 A to 125.00 A
or ∞ (disabled)
Pickup value 3I0> STUB
(earth)
for I
N
= 1 A 0.05 A to 25.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.25 A to 125.00 A
or ∞ (disabled)
Delays T Iph STUB 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
T 3I0 STUB 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Pickup thresholdIph> Dir.
(directional phases)
for I
N
= 1 A 0.10 A to 25.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.50 A to 125.00 A
or ∞ (disabled)
Pickup threshold3I0> Dir.
(Earth directional)
for I
N
= 1 A 0.05 A to 25.00 A
or ∞ (disabled)
Increment 0.01 A
for I
N
= 5 A 0.25 A to 125.00 A
or ∞ (disabled)
Time Delays
(directional stages)
T Iph> Dir. 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
T 3I0> Dir. 0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Dropout ratio Approx . 0,93 for I/I
N
≥ 0,5
Pick-up times ca. 33 ms
Dropout times Approx. 30 ms
Tolerances Currents 3 % of setting value or 1 % nominal current
Times 1 % of setting value or 10 ms
The set times are pure delay times