7SR21 & 7SR22 Performance Specification
2.14 51 Time Delayed Overcurrent
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
Unrestricted Page 36 of 68
IDMTL
DTL
- 10 °C to + 55 °C
+ 2 Hz £ 5 %
f
- 3 Hz to f
nom
nom
Value
0.05, 0.06... 2.5 xIn
IEC-NI, -VI, -EI, -LTI;
ANSI-MI, -VI, -EI; DTL
0.025, 0.05... 1.6
0, 0.01... 20 s
ANSI DECAYING, 0, 1... 60 s
2 to 20 x ls
5 x Is
Value
105 % Is, ± 4 % or ± 1 % In
³ 95 % I
op
± 1 %
£ 5 %
© 2013 Siemens Protection Devices Limited