Siemens 7SR51 - 10.8 46 Negative-Sequence Overcurrent Protection

46 Negative-Sequence Overcurrent Protection
Definite Time Element (46DT)
Reference
Parameter Value
I
set
Setting 0.05 to 4 ⋅ I
rated
I Applied current (for operate time) 0 to 2 ⋅ I
set
(switched)
0 to 5 ⋅ I
set
(switched)
t
delay
Delay setting 0 to 20 s, Δ 0.01 s
20 to 100 s, Δ 0.1 s
100 to 1000 s, Δ 1 s
1000 to 10000 s, Δ 10 s
1000 to 14400 s, Δ 100 s
Operate and Reset Level
Attribute Value
I
op
Operate level I
set
: ± 5 % or ± 1 % I
rated
Reset level ≥ 95 % I
op
Repeatability ± 1 %
Transient overreach (X/R ≤ 100) ≤ -5 %
Variation IEC
60255-1
-10 °C to +55 °C ≤ 5 %
f
rated
± 5 % ≤ 5 %
Operate and Reset Time
Attribute
Value
t
basic
Element basic operate time 2 ⋅ I
set
: 40 ms ± 10 ms
5 ⋅ I
set
: 30 ms ± 10 ms
t
delay
char = DTL t
delay
± 1 % or ± 30 ms
Repeatability ± 1 % or ± 10 ms
Overshoot time < 40 ms
Disengaging time < 90 ms
Inverse Time Element (46IT)
Reference
Parameter
Value
char Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL
Tm Time multiplier setting 0.025 to 1.6
I
set
Setting 0.05 to 2.5 ⋅ I
rated
I Applied current (for operate time) IDMTL 0 to 2 ⋅ I
set
(switched)
t
delay
Delay setting 0 to 20 s
t
reset
Reset setting ANSI Decaying, 0 to 60 s
10.8
10.8.1
10.8.2
Technical Data
10.8 46 Negative-Sequence Overcurrent Protection
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual 511
C53000-G7040-C014-1, Edition 11.2019