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Engineering Guide CDA3000
3 Selection of inverter module
Figure 3.2 Voltage and current conditions in the IT system
a) IT system with ground fault on conductor L3. The ground fault current l
d
flows via the capacitors of the healthy conductors.
b) Conductor voltage against ground with symmetrical conductor capacity.
All conductors conduct the star voltage against ground.
c) Conductor voltage against ground in the system. System with a ground
fault on conductor L3. The healthy conductors conduct the conductor volt-
age against ground. It determines the amount of the ground fault current
by way of the conductor capacitors.
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