Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 20 of 45
2.4.6 Operate and Reset Time (46IT)
Attribute Value
Starter operate time (t 2xIs) 35 ms, r 10ms
char = IEC-NI,
IEC-VI,
IEC-EI,
IEC-LTI
>@
Tm
K
t
Is
I
op
u
 1
D
, r 5 % absolute or r 50 ms,
for char = IEC-NI : K = 0.14, D = 0.02
IEC-VI : K = 13.5, D = 1.0
IEC-EI : K = 80.0, D = 2.0
IEC-LTI : K = 120.0, D = 1.0
char = ANSI-MI,
ANSI-VI,
ANSI-EI
>@
TmB
A
t
P
Is
I
op
u
»
»
¼
º
«
«
¬
ª

 1
, r 5 % absolute or r 50 ms,
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
t
op
Operate time
char = DTL
t
d
, r 1 % or r 20ms
ANSI DECAYING
>@
Tm
R
t
Is
I
res
u
 1
2
, r 5 % absolute or r 50 ms,
for char = ANSI-MI : R = 4.85
ANSI-VI : R = 21.6
ANSI-EI : R = 29.1
Reset time
t
res
t
res
, r 1 % or r 20ms
Repeatability
r 1 % or r 20ms
Overshoot time < 40 ms
Disengaging time < 60 ms