EDR-5000
IM02602007E
51X/67X INV Measured Ground Fault Protection
Elements
51X[1] ,51X[2]
All ground current elements are identically structured.
The following table shows the application options of the earth overcurrent protection element
Applications of the IG-Protection Module
Setting in
Option
ANSI 51X – Ground overcurrent protection,
non-directional
Device Planning menu
Setting: Non-directional
Measuring Mode:
Fundamental/TrueRMS
ANSI 67X – Ground overcurrent protection,
directional
Device Planning menu
Setting: Forward/Reverse
Measuring Mode:
Fundamental/TrueRMS
VX Selection: measured/calculated
Criterion
For all protection elements it can be determined, whether the measurement is done on basis of the »
Fundamental« or if
»
TrueRMS« measurement is used.
VX Selection
Within the parameter menu, this parameter determines, whether the earth current and the residual voltage is
»
measured« or »calculated«.
Calculation is only possible, when phase to neutral voltage is applied to the
voltage inputs.
At setting »
measured« the quantities to be measured, i. e. Residual voltage and
the measured ground current have to be applied to the corresponding 4
th
measuring input.
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