Siemens 7SR12 Argus - Under;Over Frequency; Reference; Operate and Reset Level; Operate and Reset Time

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 51 of 56
2.23 81 Under/over frequency
2.23.1 Reference
Parameter Value
Fs
Setting 43, 43.01… 68 Hz
V
s
Guard
Guard Setting 35, 35.5, …199.5, 200 V
Hyst
Hysteresis setting 0, 0.1… 2%
td
Delay setting
0.00, 0.01
… 20.0, 20.1… 100.0, 101.…1000, 1010 … 10000 ,
10100 … 14400 s
2.23.2 Operate and Reset Level
Attribute Value
F
op
Operate level
100 % F
s
, ± 10mHz
Reset level
overfrequency
(100 % - hyst) xF
op,
± 10mHz
underfrequency
(100 % + hyst) xF
op,
± 10mHz
Repeatability
± 1 %
Variation -10 °C to +55 °C
≤ 5 %
2.23.3 Operate and Reset Time
Attribute
Value
t
basic
Element basic
operate time
(for ROCOF
between 1 and
5.0 Hz/sec)
overfrequency
Typically < 110ms
Maximum < 150ms
underfrequency
Typically < 110ms
Maximum < 150ms
Element basic
operate time
(for ROCOF
between 0.1
and 1.0 Hz/sec)
overfrequency
Typically < 150ms
Maximum < 200ms
underfrequency
Typically < 150ms
Maximum < 200ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Repeatability
± 1 % or ± 10ms
Disengaging time
< 100 ms