7SR21 & 7SR22 Performance Specification
Unrestricted Page 54 of 68
© 2013 Siemens Protection Devices Limited
2.24 81 Under/Over Frequency
2.24.1 Reference
Parameter
Value
Fs
Setting
40, 40.01… 69.99 Hz
Hyst
Hysteresis setting
0, 0.1… 80 %
td
Delay setting
0.00, 0.01… 20.0, 20.1… 100.0, 101.…1000, 1010 … 10000 ,
10100 … 14400 s
2.24.2 Operate and Reset Level
Attribute
Value
F
op
Operate level
100 %
F
s
,
±
10 mHz
Reset level
overfrequency
(100 % -
hyst
)
xF
op,
±
10 mHz
underfrequency
(100 % +
hyst
)
xF
op,
±
10 mHz
Repeatability
±
1 %
Variation
- 10 °C to + 55 °C
£
5 %
2.24.3 Operate and Reset Time
Attribute
Value
t
basic
Element basic
operate time
(for ROCOF
between 0.1
and 5.0 Hz/sec)
overfrequency
Typically
<
110 ms
Maximum
<
150 ms
underfrequency
Typically
<
110 ms
Maximum
<
150 ms
t
op
Operate time following delay
t
basic
+
t
d
,
±
1 % or
±
10 ms
Repeatability
±
1 % or
±
10 ms
Disengaging time
<
100 ms
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
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