Siemens 7SR224 - Reference (46 IT); Operate and Reset Level (46 IT); Operate and Reset Time (46 IT)

7SR224 Argus Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 Page 19 of 49
2.3.4 Reference (46IT)
Parameter Value
char
Characteristic setting IEC-NI, -VI, -EI, -LTI; ANSI-MI, -VI, -EI; DTL
Tm
Time Multiplier setting 0.025, 0.050 … 1.6
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
2.3.5 Operate and Reset Level (46IT)
Attribute Value
I
op
Operate level
105 % Is, ± 4 % or ± 1% In
Reset level
≥ 95 % I
op
Repeatability
± 1 %
-10 °C to +55 °C
≤ 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
≤ 5 %
2.3.6 Operate and Reset Time (46IT)
Attribute Value
Starter operate time (≥ 2xIs) 35 ms, ± 10ms
char = IEC-NI,
IEC-VI,
IEC-EI,
IEC-LTI
[]
Tm
K
t
Is
I
op
×
−
=
1
α
, ± 5 % absolute or ± 50 ms,
for char = IEC-NI : K = 0.14, α = 0.02
IEC-VI : K = 13.5, α = 1.0
IEC-EI : K = 80.0, α = 2.0
IEC-LTI : K = 120.0, α = 1.0
char = ANSI-MI,
ANSI-VI,
ANSI-EI
[]
TmB
A
t
P
Is
I
op
×
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
+
−
=
1
, ± 5 % absolute or ± 50 ms,
for char = ANSI-MI : A = 0.0515, B = 0.114, P = 0.02
ANSI-VI : A = 19.61, B = 0.491, P = 2.0
ANSI-EI : A = 28.2, B = 0.1217, P = 2.0
t
op
Operate time
char = DTL
t
d
, ± 1 % or ± 20ms
ANSI DECAYING
[]
Tm
R
t
Is
I
res
×
−
=
1
2
, ± 5 % absolute or ± 50 ms,
for char = ANSI-MI : R = 4.85
ANSI-VI : R = 21.6
ANSI-EI : R = 29.1
Reset time
t
res
t
res
, ± 1 % or ± 20ms
Repeatability
± 1 % or ± 20ms
Overshoot time < 40 ms
Disengaging time < 60 ms