Siemens Argus 7SR21 Technical Manual page 244

Description
Gn 81-3 Hysteresis
Sets the pickup to dropoff thresholds e.g. 3% on Overlevel
picks up above pickup setting and drops off below 97% of
setting, 3% on Underlevel picks up below setting and drops off
above 103% of setting
Gn 81-3 Delay
Sets operate delay time
Gn 81-3 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
3.9.4. 81-4
Description
Gn 81-4 Element
Selects whether the Under/Over frequency element stage 4 is
enabled
Gn 81-4 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Gn 81-4 Setting
Under or over frequency pickup level
Gn 81-4 Hysteresis
Sets the pickup to dropoff thresholds e.g. 3% on Overlevel
picks up above pickup setting and drops off below 97% of
setting, 3% on Underlevel picks up below setting and drops off
above 103% of setting
Gn 81-4 Delay
Sets operate delay time
Gn 81-4 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
3.9.5. 81-5
Description
Gn 81-5 Element
Selects whether the Under/Over frequency element stage 5 is
enabled
Gn 81-5 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Gn 81-5 Setting
Under or over frequency pickup level
Gn 81-5 Hysteresis
Sets the pickup to dropoff thresholds e.g. 3% on Overlevel
picks up above pickup setting and drops off below 97% of
setting, 3% on Underlevel picks up below setting and drops off
above 103% of setting
Gn 81-5 Delay
Sets operate delay time
Gn 81-5 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
Unrestricted ©2018 Siemens Protection Devices Limited
Range
0, 0.1 ... 79.9, 80
0, 0.01 ... 14300, 14400
No, Yes
Range
Disabled, Enabled
Under, Over
40, 40.01 ... 69.98, 69.99
0, 0.1 ... 79.9, 80
0, 0.01 ... 14300, 14400
No, Yes
Range
Disabled, Enabled
Under, Over
40, 40.01 ... 69.98, 69.99
0, 0.1 ... 79.9, 80
0, 0.01 ... 14300, 14400
No, Yes
7SR220 Settings Guide
Default
0.1 %
0.6 s
Yes
Default
Disabled
Under
47.5 Hz
0.1 %
0.4 s
Yes
Default
Disabled
Under
47.5 Hz
0.1 %
0.4 s
Yes
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