7SR220 Settings Guide
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3.9.6. 81-6
Description Range Default
Gn 81-6 Element
Selects whether the Under/Over frequency element stage 6 is
enabled
Disabled, Enabled Disabled
Gn 81-6 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Under, Over Under
Gn 81-6 Setting
Under or over frequency pickup level
40, 40.01 ... 69.98, 69.99 47.5 Hz
Gn 81-6 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 81-6 Delay
Sets operate delay time
0, 0.01 ... 14300, 14400 0.4 s
Gn 81-6 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
No, Yes Yes
3.10. Supervision
3.10.1. CB Fail
Description Range Default
Gn 50BF Element
Selects whether the Circuit Breaker Fail element is enabled
Disabled, Enabled Disabled
Gn 50BF Setting
Breaker Fail Current Pickup level. If the current falls below this
level then the CB is deemed to have opened and the element
is reset.
0.05, 0.055 ... 1.995, 2 0.2 xIn
Gn 50BF-I4 Setting 0.005, 0.01 ... 1.995, 2 0.05 xIn
Gn 50BF-1 Delay
Delay before Circuit Breaker Fail stage 1 operates
20, 25 ... 59995, 60000 60 ms
Gn 50BF-2 Delay
Delay before Circuit Breaker Fail stage 2 operates
20, 25 ... 59995, 60000 120 ms
3.10.2. VT Supervision
Description Range Default
Gn 60VTS Element
Selects whether the VT supervision element is enabled
Disabled, Enabled Disabled
Gn 60VTS Component
Selects whether NPS or ZPS quantities are used by the VT
supervision element
NPS, ZPS NPS
Gn 60VTS V
Level above which there is a possible 1 or 2 phase VT fuse
failure
7, 8 ... 109, 110 7 V
Gn 60VTS I
Level above which a 1 or 2 phase fault condition is assumed
so VTS inhibited
0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35,
0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7,
0.75, 0.8, 0.85, 0.9, 0.95, 1
0.1 xIn
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