Eaton PowerXL DC1 Series - 2.2.1 Mains connection and configuration

2 Engineering
2.2 Electrical power network
28 DC1 variable frequency drive 12/13 MN04020003Z-EN www.eaton.com
2.2 Electrical power network
2.2.1 Mains connection and configuration
DC1 variable frequency drives can be connected to and run on all neutral
point-grounded AC supply systems (TN-S, TN-C, TT grounding systems;
please refer to IEC 60364) without any limitations.
Figure 11: AC supply systems with earthed center point
The connection and operation of variable frequency drives to asymmetrically
grounded TN networks (phase-grounded Delta network "Grounded Delta",
USA) or non-grounded or high-resistance grounded (over 30 ) IT networks is
only conditionally permissible.
If a DC1 variable frequency drive is connected to a corner-grounded system
or to an IT system (ungrounded, insulated), the internal radio interference
suppression filter must be disconnected (by unscrewing the screw marked
EMC – in DC1-…-A20N only).
TN-S TN-C TT
￫
While planning the project, consider a symmetrical distribution
to the three main phase conductors, if multiple variable
frequency drives with single-phase supplies are to be
connected. The total current of all single phase consumers is
not to cause an overload of the neutral conductor (N-conductor).
￫
Operation on non-earthed networks (IT) requires the use of suit-
able insulation monitors (e.g. pulse-code measurement method)
￫
In networks with an earthed phase conductor, the maximum
phase-earth voltage must not exceed 300 VAC.
L2
N
L1
L3
PE
L2
PEN
L1
L3
L2
N
L1
L3