Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 37 of 45
2.13 64H Restricted Earth Fault Protection
2.13.1 Reference
Parameter Value
I
s
Setting 0.005, 0.010… 0.95 xIn
t
d
Delay setting
0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 …
10000 , 10100 … 14400 s
2.13.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, r 5 % or r1% xIn
Reset level
95 % I
op
, r 5 % or r0.1% xIn
Repeatability
r 1 %
Transient overreach
(X/R d 100)
d -5 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
d 5 %
2.13.3 Operate and Reset Time
Attribute Value
0 to 2 xIs, 40 ms, r 10ms
t
basic
Element basic operate time
0 to 5 xIs, 30 ms, r 10ms
t
op
Operate time following delay
t
basic
+ t
d
, r 1% or r 10ms
Repeatability
r 1% or r 10ms
Overshoot time < 40 ms
Disengaging time < 50 ms