Time Delayed Derived Earth Fault; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR10 Argus Series Manual

2.14 51N Time Delayed Derived Earth Fault

2.14.1 Reference

Parameter
Is Setting
char Characteristic setting
Tm Time Multiplier setting
t Delay setting
d
t Reset setting
res
Applied Current
I
(for operate time)

2.14.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation

2.14.3 Operate and Reset Time

Attribute
Starter operate time (≥ 2xI
t Operate time
op
© 2018 Siemens Protection Devices Limited
IDMTL
DTL
-10 °C to +60 °C
f ± 5 %
nom
)
s
char = IEC-NI,
IEC-VI,
IEC-EI,
IEC-LTI
char = ANSI-MI,
ANSI-VI,
ANSI-EI
char = DTL
Value
0.05, 0.06... 4xI
n
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
0.01, 0.015,... 1.6, 1.7,...5, 6,...100
0, 0.01... 20 s
ANSI DECAYING, 0, 1... 60 s
2 to 20xI
s
5xI
s
Value
105 % I , ± 4 % or ± 1 % I
s
≥ 95 % I
op
± 1 %
≤ 5 %
≤ 5 %
Value
30 ms, ± 20 ms
K
t = × Tm
,
[ ]
op
α
I
− 1
Is
± 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
 
A
 
t = + B × Tm
[ ]
op
 
P
I
− 1
 
Is
± 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,
t , ± 1 % or ± 20 ms
d
7SR10 Performance Specification
n
,
B = 0.1217, P = 2.0
Chapter 3 Page 36 of 52