Italtecnica Nettuno 3P-13A Manuel D'instruction page 33

LINE CONNECTION

Power supply: three-phase 400 Volt 50/60Hz.
The electrical system to which the equipment is connected must comply with the safety regulations in force and
must therefore be equipped with:
- an automatic magnetothermic switch with high breaking capacity and with a trigger current proportional to the
capacity of the pump installed
- earthing with total resistance in conformity with local standards and in any case never over 100Ω
If the device is used in swimming pools, fountains or garden ponds, an automatic differential switch of the "A" type
(with IΔn=30mA) must always be fitted.
The system comprising Nettuno and an electric pump is considered a "fixed system"; it is therefore advisable to
make arrangements to prevent the device being disconnected from the power line it was originally connected to and
mistakenly reconnected to another source of power not equipped with the electrical protection required.
Always install, upline of the inverter, a device that ensures omnipolar disconnection from the mains with a contact
opening gap of at least 3 mm.Before making the electrical connection, the cables must be prepared with special
crimp terminals (fork-type). The terminals must be crimped by specially trained personnel, using proper crimping
tools. After inserting the cable in the metal cable clamp, coil the three power cables (U,V,W) around the ferrite core
supplied, as shown in the images below. This preparation is essential to reduce electromagnetic disturbance. The
earthing wire must not be wound around the ferrite core, but connected directly to the terminal board.
V
U
Connect the earthing wire to the corresponding terminal. Then proceed with the connection of the device power
wires to the terminal board marked with the letters U, V, W as shown in the image below.
The recommended cable section is 2.5mm
The type of wire must be selected according to the conditions of use (domestic, dry or wet).
W
2
.
POWER SUPPLY
TERMINAL
BOARD
33
U
V
W