GEFRAN-SIEI ARTDrive Manual De Instrucciones página 37

Power Supply and Grounding
1) Drives are designed to be powered from standard three phase lines that are electrically symmetrical
with respect to ground (TN or TT network).
2) In case of supply with IT network, the use of delta/wye transformer is mandatory, with a secondary
three phase wiring referred to ground.
In case of a three phase supply not symmetrical to ground, an insulation loss of one of
the devices connected to the same network can cause functional problem to the drive,
Caution if the use of a delta/wye transformer is avoided.
Please refer to the following connection sample.
Safety
ground
Mains connection and inverter output
The drivea must be connected to an AC mains supply capable of delivering a symmetrical short circuit
current lower or equal to the values indicated on table.
Note from the table the allowable mains voltages. The cycle direction of the phases is free.
Voltages lower than the min. tolerance values can cause the block of the inverter.
Adjustable Frequency Drives and AC Input filters have ground discharge currents greater than 3.5
mA. EN 50178 specifies that with discharge currents greater than 3.5 mA the protective conductor
ground connection (PE1) must be fixed type.
AC Input Current
Note! The Input current of the drive depends on the operating state of the connected motor. The
tables (chapter 3.4) shows the values corresponding to rated continuous service, keeping
into account typical output power factor for each size.
L1
L2
L3
Earth
All wires (including motor ground) must
be connected inside the motor terminal box
Lift Drive System •