37Sef-1; 37Sef-2; Thermal; Arc Flash Detector - Siemens Argus 7SR21 Technical Manual

3.4.9.5.

37SEF-1

Description
Gn 37SEF-1 Element
SEF under current element 37SEF-1
Gn 37SEF-1 Setting
Pickup level
Gn 37SEF-1 Delay
Sets operate delay time
3.4.9.6.

37SEF-2

Description
Gn 37SEF-2 Element
SEF under current element 37SEF-2
Gn 37SEF-2 Setting
Pickup level
Gn 37SEF-2 Delay
Sets operate delay time
3.4.10.

Thermal

Description
Gn 49 Thermal Overload
Selects whether the thermal overload protection element is
enabled
Gn 49 Overload Setting
Pickup level
Gn 49 Time Constant (Minutes)
Thermal time constant
Gn 49 Capacity Alarm
Selects whether thermal capacity alarm enabled
49 Reset Therm State
Control that allows thermal state to be manually reset
3.4.11.

ARC Flash Detector

Description
Gn 50AFD
Selects whether the ARC Flash Detector element is enabled
Gn 50AFD Setting
Pickup level
3.5.

Voltage Protection

3.5.1.

Phase U/O Voltage

Description
Gn Voltage Input Mode
Selects Ph-Ph or Ph-N voltages for U/V guard element & 27/59
elements operation.
Unrestricted ©2018 Siemens Protection Devices Limited
Range
Disabled, Enabled
0.005, 0.006 ... 4.995, 5
0, 0.01 ... 14300, 14400
Range
Disabled, Enabled
0.005, 0.006 ... 4.995, 5
0, 0.01 ... 14300, 14400
Range
Disabled, Enabled
0.1, 0.11 ... 2.99, 3
1, 1.5 ... 999.5, 1000
Disabled, 50 ... 99, 100
Range
Disabled, Enabled
1, 2,...10
Range
Ph-N, Ph-Ph
7SR220 Settings Guide
Default
Disabled
0.2 xIn
0 s
Default
Disabled
0.2 xIn
0 s
Default
Disabled
1.05 xIn
10 minutes
Disabled
Default
Disabled
2 xIn
Default
Ph-N
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