Siemens 7SR12 Argus - Power Factor; Reference; Operate and Reset Level; Operate and Reset Time

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 45 of 56
2.18 55 Power Factor
2.18.1 Reference
Parameter
Value
PF
s
55-n Setting
0.05…0.99
t
d
55-n Delay setting 0.00 … 14400 s
2.18.2 Operate and Reset Level
Attribute
Value
PF
op
Operate Level
PF
s
± 0.05
Reset Level Under PF
≤PF
op
+ 0.02
Over PF
≥PF
op
- 0.02
Repeatability
± 0.05
Variation
-10 °C to +55 °C
± 0.05
f
nom
– 3 Hz to f
nom
+ 2 Hz
± 0.05
2.18.3 Operate and Reset Time
Attribute Value
t
basic
Element basic operate time
≤ 70 ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Disengaging time < 80 ms
2.18.4 Operate Threshold
Attribute Value
Minimum levels for
operation
I 2.5 % In
V 2.5% Vn