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20 Commander S100 User Guide
4.1.2 Three phase supply connections
Figure 4-2 Three phase power connections
4.1.3 Ground connections
The supply and motor ground connections are made using the ground busbar located at the bottom of the drive as shown in Figure 4-3. The drive
must be connected to the system ground of the A.C. supply. The ground wiring must conform to local regulations and codes of practice.
Figure 4-3 Ground connections (Size 1 shown)
4.1.4 Protective ground cable ratings
Minimum ground conductor size
Two copper conductors of the same cross-sectional area as the input phase conductor.
If the drive is connected via a plug/socket conforming to IEC60309 then a single protective earthing conductor of at least 2.5 mm
2
as part of a multi-
conductor cable with adequate strain relief is permitted.
L1 L2
Op onal EMC Filterti
Op onal Line Reactorti
L1 L2
Ground
Fuses /
MCB
Supply
L3
L3
U V W
The ground loop impedance must conform to the requirements of local safety regulations. The drive must be grounded by a connection
capable of carrying the prospective fault current until the protective device (fuse, MCB) disconnects the A.C. supply. The ground
connections must be inspected and tested at appropriate intervals.
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