Logic Of The Function; Application And Setting Notes - Siemens Reyrolle 7SR5 Manual

Protection and Automation Functions
5.5 37 Undercurrent Protection – Phase

Logic of the Function

5.5.3
[lo_7SR5_37logicdiagram, 1, en_US]
Figure 5-6

Application and Setting Notes

5.5.4
Parameter: 37 Common > UC Guard Setting
•
Default setting: 0.1 x I
Current elements can be blocked if all phase currents fall below setting.
Parameter: Element
•
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.
172
Logic Diagram: 37 Undercurrent Protection – Phase
(0.1 ⋅ I )
n rated
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019