7SR220 Settings Guide
Unrestricted Page 38 of 107 © 2013 Siemens Protection Devices Limited
3.9.1. 81-1
Description Range Default
Gn 81-1 Element
Selects whether the Under/Over frequency element stage 1 is
enabled
Disabled, Enabled Disabled
Gn 81-1 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Under, Over Under
Gn 81-1 Setting
Under or over frequency pickup level
40, 40.01 ... 69.98, 69.99 49.5 Hz
Gn 81-1 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
0, 0.1 ... 79.9, 80 0.1 %
Gn 81-1 Delay
Sets operate delay time
0, 0.01 ... 14300, 14400 1 s
Gn 81-1 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
No, Yes Yes
3.9.2. 81-2
Description Range Default
Gn 81-2 Element
Selects whether the Under/Over frequency element stage 2 is
enabled
Disabled, Enabled Disabled
Gn 81-2 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Under, Over Under
Gn 81-2 Setting
Under or over frequency pickup level
40, 40.01 ... 69.98, 69.99 49 Hz
Gn 81-2 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
0, 0.1 ... 79.9, 80 0.1 %
Gn 81-2 Delay
Sets operate delay time
0, 0.01 ... 14300, 14400 0.8 s
Gn 81-2 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
No, Yes Yes
3.9.3. 81-3
Description Range Default
Gn 81-3 Element
Selects whether the Under/Over frequency element stage 3 is
enabled
Disabled, Enabled Disabled
Gn 81-3 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Under, Over Under
Gn 81-3 Setting
Under or over frequency pickup level
40, 40.01 ... 69.98, 69.99 48 Hz
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