Supervision; Cb Fail; Vt Supervision - Siemens Argus 7SR21 Technical Manual

7SR220 Settings Guide
3.9.6. 81-6
Description
Gn 81-6 Element
Selects whether the Under/Over frequency element stage 6 is
enabled
Gn 81-6 Operation
Selects between Underfrequency and Overfrequency pickup
for this element
Gn 81-6 Setting
Under or over frequency pickup level
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
Gn 81-6 Delay
Sets operate delay time
Gn 81-6 U/V Guarded
Selects whether U/V Guard element can block the operation of
this element
3.10.

Supervision

3.10.1.

CB Fail

Description
Gn 50BF Element
Selects whether the Circuit Breaker Fail element is enabled
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.
Gn 50BF-I4 Setting
Gn 50BF-1 Delay
Delay before Circuit Breaker Fail stage 1 operates
Gn 50BF-2 Delay
Delay before Circuit Breaker Fail stage 2 operates
3.10.2.

VT Supervision

Description
Gn 60VTS Element
Selects whether the VT supervision element is enabled
Gn 60VTS Component
Selects whether NPS or ZPS quantities are used by the VT
supervision element
Gn 60VTS V
Level above which there is a possible 1 or 2 phase VT fuse
failure
Gn 60VTS I
Level above which a 1 or 2 phase fault condition is assumed
so VTS inhibited
Unrestricted Page 40 of 107
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
0.05, 0.055 ... 1.995, 2
0.005, 0.01 ... 1.995, 2
20, 25 ... 59995, 60000
20, 25 ... 59995, 60000
Range
Disabled, Enabled
NPS, ZPS
7, 8 ... 109, 110
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
© 2013 Siemens Protection Devices Limited
Default
Disabled
Under
47.5 Hz
0.1 %
0.4 s
Yes
Default
Disabled
0.2 xIn
0.05 xIn
60 ms
120 ms
Default
Disabled
NPS
7 V
0.1 xIn