Siemens SIPROTEC Manual page 616

Technical Data
4.16 Backup Time Overcurrent Protection
Inverse Time Stages (ANSI)
Pickup value I (phases)
P
Pickup value 3I (earth)
0P
Time multipliers
Additional time delays
Characteristics
Tolerances
Pickup/dropout thresholds I
Pickup time for 2 ≤ I/I ≤ 20 and D
P
Pickup time for 2 ≤ I/3I
0P
Defined times
Further Definite Stage
Pickup value I >>>(phases)
Ph
Pickup value 3I >>> (earth)
0
Delays
Dropout to pickup ratio
Pickup times (fast relays/high-speed relays)
Dropout times
Tolerance currents
The set times are pure delay times.
616
for I = 1 A
N
for I = 5 A
N
for I = 1 A
N
for I = 5 A
N
D (phases)
IP
D (earth)
3I0P
T
IP delayed
T
3I0P delayed
, 3I
p 0p
≥ 1 s
IP
≤ 20 and D ≥ 1 s
3I0P
for I = 1 A
N
for I = 5 A
N
for I = 1 A
N
for I = 5 A
N
T >>>
IPh
T >>>
3I0
Currents
Times
0.10 A to 4.00 A
or ∞ (ineffective)
0.50 A to 20.00 A
or ∞ (ineffective)
0.05 A to 4.00 A
or ∞ (ineffective)
0.25 A to 20.00 A
or ∞ (ineffective)
0.50 s to 15.00 s
or ∞ (ineffective)
0.50 s to 15.00 s
or ∞ (ineffective)
(phases) 0.00 s to 30.00 s
(earth) 0.00 s to 30.00 s
See Figure 4-3 and 4-4
3 % of set value, or 1 % nominal current
5 % of set value ± 15 ms
5 % of set value ± 15 ms
1 % of setting value or 10 ms
0.10 A to 25.00 A
or ∞ (ineffective)
0.50 A to 125.00 A
or ∞ (ineffective)
0.05 A to 25.00 A
or ∞ (ineffective)
0.25 A to 125.00 A
or ∞ (ineffective)
0.00 s to 30.00 s
or ∞ (ineffective)
0.00 s to 30.00 s
or ∞ (ineffective)
Approx. 0.95 for I/I ≥ 0.5
N
Approx. 25 ms/20 ms
Approx. 30 ms
3 % of setting value or 1 % nominal current
1 % of setting value or 10 ms
C53000-G1176-C169-5, Release date 02.2011
Increments 0.01 A
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
Increments 0.01 s
Increments 0.01 s
Increments 0.01 A
Increments 0.01 A
Increments 0.01 s
Increments 0.01 s
SIPROTEC, 7SD5, Manual