Siemens Argus 7SR21 - CT Supervision; Broken Conductor

7SR220 Settings Guide
Unrestricted ©2018 Siemens Protection Devices Limited Page 41 of 107
Description Range Default
Gn 60VTS Vpps
Level below which there is a possible 3 phase VT fuse failure
1, 2 ... 109, 110 15 V
Gn 60VTS Ipps Load
Level current must be above before 3 phase VTS will be
issued
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
Gn 60VTS Ipps Fault
Level above which 3 phase fault is assumed so VTS inhibited
0.05, 0.1 ... 19.95, 20 10 xIn
Gn 60VTS Delay
Sets operate delay time
0.03, 0.04 ... 14300, 14400 10 s
Gn 60VTF-Bus Element
Selects whether the Bus VT Fail element is enabled. Element
based on voltages and circuit breaker position
Enabled, Disabled Disabled
Gn 60VTF-Bus Delay
Sets operate delay time
0, 0.1 ... 99.9, 100 2s
3.10.3. CT Supervision
Description Range Default
Gn 60CTS Element
Selects whether the CT supervision element is enabled (NPS
current in the absence of NPS voltage)
Disabled, Enabled Disabled
Gn 60CTS Inps
Arm if NPS Current (Inps) is above this level
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
Gn 60CTS Vnps
Inhibit if NPS Voltage (Vnps) is above this level
7, 8 ... 109, 110 10 V
Gn 60CTS Delay
CTS Operate delay
0.03, 0.04 ... 14300, 14400 10 s
Gn 60CTS-I Element Disabled, Enabled Disabled
Gn 60CTS-I Setting 0.05, 0.1 ... 1.95, 2 0.05 xIn
Gn 60CTS-I Delay 0.03, 0.04 ... 14300, 14400 10 s
3.10.4. Broken Conductor
Description Range Default
Gn 46BC U/C Guard Setting 0.05, 0.1 ... 4.95, 5 0.25 xIn
Gn 46BC Element
Selects whether the definite time broken conductor element is
enabled
Disabled, Enabled Disabled
Gn 46BC Setting
NPS Current to PPS Current ratio
20, 21 ... 99, 100 20 %
Gn 46BC Delay
Sets operate delay time
0.03, 0.04 ... 14300, 14400 20 s
Gn 46BC U/C Guarded No, Yes No