Siemens 7SR12 Argus - Negative Phase Sequence Overcurrent; Reference (46 DT); Operate and Reset Level (46 DT); Operate and Reset Time (46 DT)

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 22 of 56
2.5 46 Negative Phase Sequence Overcurrent
2.5.1 Reference (46DT)
Parameter Value
I
s
Setting
0.05, 0.06... 4.0xIn
t
d
Delay setting
0.00, 0.01…20.00, 20.10… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.5.2 Operate and Reset Level (46DT)
Attribute
Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
≥ 95 % I
op
Repeatability
± 1 %
Transient overreach
(X/R ≤ 100)
≤ -5 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
≤ 5 %
2.5.3 Operate and Reset Time (46DT)
Attribute Value
t
basic
Element basic operate time
0 to 2 xIs: 40 ms, ± 10ms
0 to 5 xIs: 30 ms, ± 10ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Repeatability
± 1 % or ± 10ms
Overshoot time <40 ms
Disengaging time < 60 ms
2.5.4 Reference (46IT)
Parameter
Value
char
Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL
Tm
Time Multiplier setting 0.025, 0.030… 1.0
I
s
Setting
0.05, 0.06… 2.5xIn
I
Applied Current (for operate time)
IDMTL
2 to 20 x Is
t
d
Delay setting 0, 0.01… 20 s
t
res
Reset setting ANSI DECAYING, 0, 1… 60 s
2.5.5 Operate and Reset Level (46IT)
Attribute
Value
I
op
Operate level
105 % Is, ± 4 % or ± 1% In
Reset level
≥ 95 % I
op
Repeatability
± 1 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
≤ 5 %