Operate And Reset Time - Siemens 7SR224 Technical Manual

2.11.3 Operate and Reset Time

Attribute
Starter operate time
char = IEC-NI,
t Operate time
op
char = ANSI-MI,
char = DTL
char = ANSI and
t
res
Reset time
t
res
Repeatability
Overshoot time
Disengaging time
f
nom
Variation
harmonics to f
©2010 Siemens Protection Devices Limited
Value
20 ms, ± 20ms
=
t
[ ]
op
I
Is
IEC-VI,
IEC-EI,
for char =
IEC-LTI
⎡
⎢
=
t [ ]
⎢
op
⎣
ANSI-VI,
Is
ANSI-EI,
for char = ANSI-MI : A = 0.0515, B = 0.114, P = 0.02
, ± 1 % or ± t
t
d
=
t
[ ]
res
I
Is
= DECAYING
for char = ANSI-MI : R = 4.85
≠ DECAYING , ± 1 % or ± 20ms
t
res
± 1 % or ± 20ms
< 40 ms
< 50 ms
- 3 Hz
to f + 2 Hz
nom
≤ 5 %
cutoff
7SR224 Argus Performance Specification
K
×
, ± 5 % absolute or ± 30 ms,
Tm
α
−
1
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
⎤
A
⎥
+ ×
, ± 5 % absolute or ± 30 ms,
B Tm
⎥
P
−
I
1
⎦
ANSI-VI : A = 19.61, B = 0.491, P = 2.0
ANSI-EI : A = 28.2, B = 0.1217, P = 2.0
cycle
R
×
, ± 5 % absolute or ± 30 ms,
Tm
2 −
1
ANSI-VI : R = 21.6
ANSI-EI : R = 29.1
Chapter 3 Page 34 of 49