7SR10 Performance Specification
© 2018 Siemens Protection Devices Limited
Chapter 3 Page 38 of 52
2.15 51SEF Time Delayed Sensitive Earth Fault
2.15.1 Reference
Parameter
Value
Is
Setting
0.005, 0.006,...0.1, 0.105, 0.110...0.5xI
n
char
Characteristic setting
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
Tm
Time multiplier
0.01, 0.015,… 1.6, 1.7,...5, 6,...100
t
d
Delay setting
0.00…20.00 s
t
res
Reset setting
DECAYING, 0, 1…60 s
I
Applied Current
(for operate time)
IDMTL
2 to 20xI
s
DTL
5xI
s
2.15.2 Operate and Reset Level
Attribute
Value
I
op
Operate level
105 % I
s
,
±
4 % or
±
1 % I
n
Reset level
95 % I
op
±
4 % or
±
1 % I
n
Repeatability
±
1 %
Variation
-10 °C to +60 °C
≤
5 %
f
nom
± 5 %
harmonics to f
cutoff
≤
5 %
2.15.3 Operate and Reset Time
Attribute
Value
Starter operate time
20 ms,
±
20 ms
t
op
Operate time
char = IEC-NI,
IEC-VI,
IEC-EI,
IEC-LTI
[ ]
Tm
K
t
Is
I
op
×
−
=
1
α
,
± 5 % absolute or ± 40 ms for TMS setting (0.01 to 0.245)
± 5 % absolute or ± 30 ms for TMS setting (0.25 to 100)
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,
[ ]
Tm
B
A
t
P
Is
I
op
×
+
−
=
1
,
± 5 % absolute or ± 40 ms for TMS setting (0.01 to 0.245)
± 5 % absolute or ± 30 ms for TMS setting (0.25 to 100)
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
Summary of Contents for 7SR10 Argus Series
Page 1: ...7SR10 Argus Overcurrent Relay Reyrolle Protection Devices ...
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