Delta Electronics MVF2000 Series, Product Manual

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 The sectional area of the earthing cables must be ≥16mm² and no less than 1/2 of the
sectional area of high voltage phase wires. In addition, good earthing connection with an
earthing resistance lower than 4Ω shall be provided by the user;

The earth leakage current value shall be lower than 3.5mA AC or 10mA DC and shall
meet the safety specifications related to high leakage current equipment;

The PE of the system earthing terminal shall be earthed reliably to prevent accidents;

To avoid interference, the control signals, communication, power source cables, and
power motor cables shall be wired separately rather than in the same wiring slot; if
separate wiring is impossible, the spacing between the control, signal, communication
and power source cables, and power motor cables shall be >30cm. Parallel layout shall
be avoided.

The control signals shall use multi-core wire with a shielding layer, wherein the shielding
layer shall be earthed at both ends and shall not be too long;

The wires used to transmit different signals must be routed in a mutually-cross way, for
example AC signal and DC signal.

Do not use the same grounding wire with other power equipment or welding machine.

Each drive should be grounded independently where there are multi-drives in the same
room, series connection to the ground is forbidden.