EDR-5000
IM02602007E
50R/67R DEFT Calculated Ground Fault Protection
Elements
50R[1] ,50R[2]
If using inrush blockings, the tripping delay of the ground current protection
functions must be at least 30 ms or more in order to prevent faulty trippings.
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 50R – Ground overcurrent protection,
non-directional
Device Planning menu
Setting: Non-directional
Measuring Mode:
Fundamental/TrueRMS
ANSI 67R – 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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