[dw_7SR5_function21LBsettingsexample, 1, en_US]
21LB-3P Impedance Setting (‘a’)
This is the minimum system impedance that allows operation of the load blinder; it is set in secondary Ω. To
enable blocking of the overcurrent element for values of current up to say 1.5 times the nominal load current
value (to allow for temporary reverse overload conditions) the setting is calculated from:
Protection and Automation Functions
5.1 21LB Load Blinder
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual 147
C53000-G7040-C014-1, Edition 11.2019
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