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Before performing any installation or maintenance operation, disconnect the inverter from the electrical
mains and wait for at least 15 minutes before touching internal parts Ensure that the voltage and
frequency values on the inverter data plate correspond to those of the power mains.
To improve the immunity to any noise radiated towards other equipment we recommend using separate ducts for the
inverter supply cables.
The installer shall be responsible for checking that the electric power supply system is fitted with an efficient earthing
system according to the regulations in force.
Ensure that all the terminals are fully tightened, paying particular attention to the earth terminal.
Also ensure that the cable clamps are fully secured to guarantee IP55 protection rating.
Check that all the connecting cables are in perfect condition, with the external sheathing unbroken. The motor of the
installed electric pump must comply with the data in Table 2.
Incorrect connection of the earth lines to a terminal other than the earth terminal may cause
irremediable damage to the whole appliance!
Incorrect connection of the power supply line on output terminals intended for the load may
cause irremediable damage to the whole appliance!
2.2.1
Pump connection for M/T and T/T models
The output for the electropump is available on the three-phase cable + earth indicated with the PUMP label.
The motor of the installed electropump must be of the three-phase type with voltage 220-240V for type M/T and 380-
480V for type T/T. To make the correct type of connection of the motor windings, follow the indications on the data
plate or on the terminal board of the electropump.
2.2.2
Pump connection for M/M models
The output for the electropump is available on the single-phase cable + earth indicated with the PUMP label.
Type DV inverters can be connected to motors with power supply 110-127V oppure 220-240V. In order to use the
voltage 220-240V to control the motor in a DV inverter, it is necessary to use a power supply with the same voltage.
For all M/M inverters size 11 and 14 A, ensure that the voltage of the motor used has been correctly
configured, see par. 5.2.5.
M/M inverters size 8.5 A can be connected only to electropumps with a 230V single-phase motor.
2.3 CONNECTION TO THE POWER SUPPLY LINE
CAUTION: The line voltage may change when the electrical pump is started up by the inverter.
The voltage may be subject to variations according to other devices connected, and the quality of the
line.
ATTENTION: The protective circuit breaker and the power cables of the inverter and of the pump must be sized
according to the system.
The differential switch for protecting the system must be correctly sized according to the characteristics indicated in
Table 2. For M/T and M/M inverters it is recommended to use a type F differential switch protected against sudden
tripping. For T/T inverters it is recommended to use a type B differential switch protected against sudden tripping.
If the instructions supplied in this manual are in contrast with the regulations in force the regulations must be
considered as valid
In the case of extensions to the inverter cables, for example for power supply to submersed electric pumps, if there is
electromagnetic disturbance, the following is recommended:
Check earthing and if necessary add an earthing device in the immediate vicinity of the Inverter.
Embed the cables.
Use shielded cables.
Install the DAB Active Shield device.
ENGLISH
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