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Although the inverter is already equipped with internal safety devices, the installation of a suitably sized thermal
magnetic circuit breaker is recommended.
If using all the power available, in order to calculate the current to use when selecting the cables and the
thermal magnetic cut-out, refer to the Table 1c which specifies the type of thermal magnetic cut-out to be used
according to current values.
10 m
20 m
30 m
1,5
1,5
1,5
4 A
1,5
1,5
2,5
8 A
1,5
2,5
12 A
2,5
2,5
16 A
4
4
20 A
4
4
24 A
6
6
28 A
2.2.1.2
Connection to the power line MCE-150/P – MCE-110/P – MCE-55/P – MCE-30/P
The inverter must be connected to the 3-phase power line by means of a 4-core cable (3 phases+earth) The
relative line specifications must correspond to those shown in Table 1.
The input terminals are those marked with the text RST and an arrow pointing towards the terminals; see
Figure 3. The section, type and laying of cables for inverter power supply and electric pump connections must
be selected in compliance with current standards. Table 4 provides indications on the cable section to be used.
The table refers to cables in PVC with 4 wires (3 phases+earth) with the minimum recommended section based
on the current and length of cable.
The current supply to the inverter can normally be calculated (taking a safety margin into account) as 1/8 of
the current absorbed by the pump.
Although the inverter is already equipped with internal safety devices, the installation of a suitably sized thermal
magnetic circuit breaker is recommended.
If the entire power range available is used, for specific information on the current to be used when choosing
cables and the thermal magnetic circuit breaker, refer to Table 4.
Table 1c also indicates the sizes of thermal magnetic circuit breakers to be used, according to the current
absorption.
2.2.1.3
Electrical connections to the pump
The connection between the inverter and the electropump must be made with a 4-core cable (3 phases +
earth). The characteristics of the connected electropump must be able to satisfy the indications in Table 1.
The output terminals are those marked with the text UVW and an arrow pointing away from the terminals; see
Figure 3.
The section, type and laying of the cables for connection to the electropump must be chosen according to the
regulations in force. Table 4 supplies an indication on the section of the cable to be used. The table refers to
4-core PVC cables (3 phases + earth) and gives the recommended minimum section with relation to the current
and the length of the cable.
The electropump current is generally specified on the motor data plate.
The rated voltage of the electric pump must be the same as the supply voltage of the inverter.
The rated frequency of the electric pump can be set via the display according to the specifications on the
manufacturer's dataplate.
For example, the inverter can also be powered at 50 [Hz] with control of an electric pump at 60 [Hz] - nominal
(provided that the pump is declared as compatible for this frequency).
For special applications, pumps are also available with frequency up to 200 [Hz].
The utility connected to the inverter must not absorb current in excess of the maximum values specified in
Table 1.
Check the dataplates and type of motor connection (star or delta) used to ensure compliance with the above
conditions.
Power supply cable section in mm²
40 m
50 m
60 m
1,5
2,5
2,5
2,5
4
4
4
6
4
6
10
10
6
10
10
10
6
10
10
16
10
10
16
16
Data concerning 3-core PVC cables (phase neutral+earth)
Table 5: Single phase line power cable section
ENGLISH
70 m
80 m
90 m
2,5
2,5
4
6
6
6
10
10
10
10
10
16
16
16
16
16
16
16
76
100 m
120 m
140 m
4
4
4
6
10
10
10
10
16
16
16
16
16
160 m
180 m
200 m
6
6
6
10
10
16
16
16
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