7SR10 Performance Specification
© 2018 Siemens Protection Devices Limited
Chapter 3 Page 39 of 52
Attribute
Value
char = DTL
t
d
,
±
1 % or
±
t
cycle
Reset time
char = ANSI and
t
res
= 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
IEC DECAYING
[ ]
Tm
R
t
Is
I
res
×
−
=
1
2
,
±
5 % absolute or
±
50 ms,
for char = IEC-NI : R = 9.7
IEC-VI : R = 43.2
IEC-EI : R = 58.2
IEC-LTI : R = 80
t
res
≠
DECAYING
t
res
,
±
1 % or
±
20 ms
Repeatability
±
1 % or
±
20 ms
Overshoot time
< 40 ms
Disengaging time
< 50 ms
Variation
f
nom
± 5 %
harmonics to f
cutoff
≤
5 %
Figure 2.12-1 and Figure 2.12-4 show the operate and reset curves for the four IEC IDMTL curves with a time
multiplier of 1.
Figure 2.12-2 and Figure 2.12-3 show the ANSI operate and reset curves. These operate times apply to non-
directional characteristics. Where directional control is applied then the directional element operate time should be
added to give total maximum operating time.
Summary of Contents for 7SR10 Argus Series
Page 1: ...7SR10 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ...Siemens Protection Devices Limited 2 ...
Page 152: ...7SR10 Technical Manual Chapter 4 Page 2 of 78 2018 Siemens Protection Devices ...
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