The pressure transducer
(d)
must be installed on the
system. We always advise the installation of a small
accumulator
(e)
(8 ltrs minimum) on the pump delivery
side.
7. Electrical connection
Electrical connection must be carried out
by a qualified electrician in accordance
with local regulations.
Follow all safety standards.
The unit must be properly earthed
(grounded).
Follow the instructions in the wiring
diagram attached.
Once the electrical connection has been
completed, remove any pieces of wire,
sheath, washers or any other foreign bodies
that may be found inside the frequency
converter.
For the electrical connections on both the
terminal board and the motor use cable with
a maximum section of 2,5mm
2
. We also
advise the use of insulated pin terminals.
Bad connections may damage the electronic
circuit.
7.1. Power supply line
Power supply line must comply with the provisions
under paragraph 4.
If a differential protection is necessary,
install a type
A differential switch
,
protected against untimely activation and
with threshold of intervention of 30 mA.
Electrical connection
7.2. Motor connection
The power supply line of the electrical motor must
be connected directly to the output terminal of the
inverter.
To comply with the standards of
electromagnetic compatibility, use a
shielded three-pole cable (for MM models)
or a shielded four-pole cable (for MT
models) with external protection sheath.
The power supply line of the motor must never run
parallel to the power line of the electrical panel.
Electrical connection
4.93.413.5
d
e
4.93.412.1
4.93.413.6
20
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