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

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 20 of 56
2.3 32S Sensitive Power
2.3.1 Reference
Parameter
Value
S
s
32S-n Setting
0.005…2 x Sn
t
d
32S-n Delay setting 0.00 … 14400 s
2.3.2 Operate and Reset Level
Attribute
Value
S
op
Operate level
100 % Ss, ± 5% or ± 2% Sn
Reset level
Over-power
≥ 95 % S
op
Under-power
≤ 105 % S
op
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
– 3 Hz to f
nom
+ 2 Hz
≤ 5 %
2.3.3 Operate and Reset Time
Attribute Value
t
basicE
Element basic
operate time
Over-power
1.1 x Ss: 60 ms ± 10 ms
2.0 x Ss: 45 ms ± 10ms
Under-power
0.5 x Ss: 30 ms ± 10ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Disengaging time < 40 ms
2.3.4 Operate Threshold
Attribute
Value
Minimum levels for
operation
I 2.5 % In
V 2.5% Vn