Installation manual

23
Wiring recommendations
Power section
The drive must be connected to the protective ground. To comply with current regulations concerning high leakage currents (above 3.5 mA),
use at least a 10 mm² (AWG 6) protective conductor or 2 protective conductors with the same cross-section as the power section
AC
supply conductors.
• Check whether the resistance to the protective ground is one ohm or less. Connect a number
of
drives to the protective ground, as shown in the diagram (see left). Do not lay protective
grounding cables in a loop or in series.
When upstream protection by means of a “residual current device” is required by the installation standards, a type A device should be used
for single-phase drives and type B for three-phase drives. Choose a suitable model integrating:
• HF current filtering
• A time delay to prevent tripping caused by the load from stray capacitance on power-up. The time delay is not possible for 30 mA devices.
In this case, choose devices with immunity against nuisance tripping, for example “residual current devices” with reinforced immunity from
the
s.i range (Merlin Gerin brand).
If the installation includes several drives, provide one residual current device per drive.
WARNING
IMPROPER WIRING PRACTICES
• The ATV71 drive will be damaged if input line voltage is applied to the output terminals (U/T1,V/T2,W/T3).
• Check the power connections before powering up the ATV71 drive.
• If replacing another drive, verify that all wiring connections to the ATV71 drive comply with all wiring instructions in this manual.
Failure to follow these instructions can result in death, serious injury or equipment damage.
WARNING
INADEQUATE OVERCURRENT PROTECTION
• Overcurrent protective devices must be properly coordinated.
• The Canadian Electricity Code and the National Electrical Code require branch circuit protection. Use the fuses
recommended on the drive nameplate to achieve published short-circuit current ratings.
• Do not connect the drive to a power feeder whose short-circuit capacity exceeds the drive short-circuit current
rating
listed on the drive nameplate.
Failure to follow these instructions can result in death, serious injury or equipment damage.
DANGER
RISK OF ELECTRIC SHOCK
Connect the device to the protective ground using the grounding point provided, as shown in the figure below. The drive panel
must be connected to the protective ground before power is applied.
Failure to follow this instruction will result in death or serious injury.
Drive
Drive
Drive