Woodward easYgen-2000 Series User Manual page 124

Configuration
Configure Monitoring > Generator > Generator Ground Fault (Le...
Calculated ground fault
Fig. 73: Generator ground fault -
Test
Calculation
Fig. 74: Generator ground fault - calculation
1 No ground fault
2 Ground fault (with vectorial calculation)
3 Ground fault (I = ground fault current)
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The current produced by the generator is monitored depending on
how parameter "Generator current measuring" (parameter
1850 Ä p.
rents IGen-L1, IGen-L2 and IGen-L3 are vectorially totaled (IS =
IGen-L1 + IGen-L2 + IGen-L3) and compared with the configured
fault limit (the calculated actual value is indicated in the display). If
the measured value exceeds the fault threshold limit, a ground fault
is present, and an alarm is issued.
schematic
Short-circuit one of the three generator current transformers
while the generator is at full load.
ð The measured current should read 100 % of rated on the
two phases that do not have their current transformers
short-circuited.
The ground current calculation does not take current on the neutral
conductor into consideration. In order for the controller to be able
to perform calculated ground fault current protection accurately, the
neutral conductor must not conduct current.
The fault threshold value is configured as a percentage. This per‐
centage threshold refers to the generator rated current (param‐
eter 1754 Ä p.
imum value for this parameter should be 10 % or greater.
The ground current I
pointers for phase currents IL1 and IL2 are parallel shifted and
lined up as shown in (Fig. 74/1).
easYgen-2200/2500 | Genset Control
97) is configured. The measured three conductor cur‐
If this protective function is triggered, the display indi‐
cates "Ground fault 1" or "Ground fault 2" and the log‐
ical command variable "06.19" or "06.20" will be ena‐
bled.
The ground fault protection zone is determined by the
location where the generator current transformer are
physically installed.
95). Due to unavoidable load asymmetries, the min‐
is calculated geometrically/vectorially. The
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