Protective Elements
IG - Ground Fault [50N/G, 51N/G, 67N/G]
Available elements:
IG[1] ,IG[2] ,IG[3] ,IG[4]
If you are using inrush blockings the tripping delay of the earth current
protection functions must be at least 30ms or more in order to prevent faulty
trippings.
All earth current elements are identically structured.
This module offers Adaptive Parameter Sets.
Parameters can be modified within parameter sets dynamically by means of
Adaptive Parameter Sets.
Please refer to chapter Parameter / Adaptive Parameter Sets.
The following table shows the application options of the earth overcurrent protection element
Applications of the IE-Protection Module Setting in Option
ANSI 50N/G – Earth overcurrent protection,
non directional
Device Planning menu
Setting: non directional
Measuring Mode:
Fundamental/TrueRMS
ANSI 51N/G – Earth short circuit protection,
non directional
Device Planning menu
Setting: non directional
Measuring Mode:
Fundamental/TrueRMS
ANSI 67N/G – Earth overcurrent/Earth short
circuit protection, directional
Device Planning menu
Setting: directional
Field parameter menu
3V0 Source:
measured/calculated
3I0 Source:
measured/calculated
Measuring Mode:
Fundamental/TrueRMS
IG Source: measured/calculated
VG Source: measured/calculated
Measuring Mode
For all protection elements it can be determined, whether the measurement is done on basis of the »
Fundamental«
or if »
TrueRMS«
measurement is used.
IG Source/VG Source
Within the parameter menu, this parameter determines, whether the earth current and the residual voltage is
»
measured«
or »
calculated«
.
Direction detection (3V0 Source und 3I0 Source)
In the field parameter menu it can be determined, if the earth current directional detection should be based on
measured or calculated values of currents and voltages. This setting takes effect on all earth current elements.
717 MCDGV4 DOK-HB-MCDGV4-2E
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