2.8
50 Instantaneous Overcurrent
2.8.1
Reference
Parameter
Is
Setting
t
Delay setting
d
2.8.2
Operate and Reset Level
Attribute
I
Operate level
op
Reset level
Repeatability
Transient overreach
(X/R ≤ 100)
Variation
2.8.3
Operate and Reset Time
Attribute
t
Element basic operate time
basic
t
Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
#
The operating timings are measured on the basis of fundamental measurement algorithm, with protection
functions and communication ports configured in the relay.
© 2018 Siemens Protection Devices Limited
-10 °C to +60 °C
f
± 5 %
nom
#
Value
0.05, 0.06... 2.5, 2.55... 50xI
0.00, 0.01...20.00, 20.10... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % I
, ± 5 % or ± 1 % I
s
≥ 95 % I
op
± 1 %
≤ -5 %
≤ 5 %
≤ 5 %
Value
0 to 2 xI
: 35 ms, ± 10 ms
s
0 to 5 xI
: 25 ms, ± 10 ms
s
t
+ t
, ± 1 % or ± 10 ms
basic
d
± 1 % or ± 10 ms
< 40 ms
< 50 ms
7SR10 Performance Specification
n
n
Chapter 3 Page 24 of 52