RO
EN
28
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.
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
2
.
The type of wire must be selected according to the conditions of use (domestic, dry or wet).
W
V
U
U
V
W
POWER SUPPLY
TERMINAL
BOARD
