Type of possible fault currents to earth
Inverter with single-phase power
supply
Inverter with three-phase power
supply
If a differential switch is used with an inverter with three-phase power supply, in compatibility with the above
indications and with the requirements of system protection, it is advised to use a switch that is protected against
sudden tripping.
Table 2a: Type of possible fault currents to earth
Figure 3a: Example of installation with single-phase power supply
Figure 4b: Example of installation with three-phase power supply
ENGLISH
Unipolar
Alternating
pulsed
74
With high-
Direct
frequency
components