Siemens Reyrolle 7SR46 - Page 57

Application and Settings Notes
Gn 50LC/SOTF
Default setting: Disabled
This setting is used to allow the element to be switched on and off if it is not required. A separate setting is
provided for each element. This setting can be used to select the number of elements required.
Parameter State Description
Disabled
The element is inactive.
Enabled
The element is active.
Gn 50LC Setting
Default setting = 2 ⋅ I
s
The setting of the parameter threshold depends on the respective application.
Gn 50LC Inrush Action
Default setting = Off
High levels of inrush currents into reactive components, for example transformers; when they are switched in
can result in operation of overcurrent elements. The inrush current can be detected by a high percentage of
second harmonic current content by the 81HBL2 element. This parameter can be configured to inhibit the
overcurrent element automatically by configuration of this setting.
Parameter State Description
Off The element is not inhibited by operation of the 81HBL2 element
Inhibit The overcurrent element is inhibited by operation of the 81HBL2 element and
automatically released when the 81HBL2 element resets.
Settings Menu
CONFIGURATION > FUNCTION CONFIG
Parameter Setting Options Settings
Default Gn1 Gn2
Gn 50LC/SOTF Disabled
Enabled
Disabled – –
CONFIGURATION > CURRENT PROTECTION > 50LC/SOTF
Parameter Setting Options Settings
Default Gn1 Gn2
Gn 50LC Setting 1 to 20 ⋅ I
s
Δ 1 ⋅ I
s
2 ⋅ I
s
– –
Gn 50LC Inrush
Action
Off
Inhibit
Off – –
Information List
Input/Output Matrix
User Logic Type IEC 103 Modbus RTU
Inhibit 50LC Inhibit 50LC Input – –
50LC 50LC Output – –
Functions
3.6 50LC/SOTF Switch onto Fault Protection
Reyrolle, 7SR46 Device, Manual 57
C53000-G7040-C103-1, Edition 10.2022