Under/Over Frequency; Reference; Operate And Reset Level; Operate And Reset Time - Siemens Argus 7SR21 Technical Manual

7SR21 & 7SR22 Performance Specification

2.24 81 Under/Over Frequency

2.24.1 Reference

Parameter
Fs Setting
Hyst Hysteresis setting
td Delay setting

2.24.2 Operate and Reset Level

Attribute
F Operate level
op
Reset level
Repeatability
Variation

2.24.3 Operate and Reset Time

Attribute
Element basic
operate time
t
(for ROCOF
basic
between 0.1
and 5.0 Hz/sec)
t Operate time following delay
op
Repeatability
Disengaging time
Unrestricted Page 54 of 68
Value
40, 40.01... 69.99 Hz
0, 0.1... 80 %
0.00, 0.01... 20.0, 20.1... 100.0, 101....1000, 1010 ... 10000 ,
10100 ... 14400 s
Value
100 % F
overfrequency
(100 % - hyst) xF
underfrequency (100 % + hyst) xF
± 1 %
£ 5 %
- 10 °C to + 55 °C
Value
Typically < 110 ms
overfrequency
Maximum < 150 ms
Typically < 110 ms
underfrequency
Maximum < 150 ms
t
basic
± 1 % or ± 10 ms
< 100 ms
, ± 10 mHz
s
± 10 mHz
op,
± 10 mHz
op,
, ± 1 % or ± 10 ms
+ t
d
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