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Current absorption and thermal magnetic circuit breaker sizing for maximum power
Supply voltage [V]
Max. motor current absorption [A]
Max. inverter current absorption [A]
Rated current of thermal magnetic circuit breaker [A]
Supply voltage [ 3 x V]
Max. motor current absorption [A]
Max. inverter current absorption [A
Rated current of thermal magnetic circuit breaker [A]
Supply voltage [ 3 x V]
Max. motor current absorption [A]
Max. inverter current absorption [A
Rated current of thermal magnetic circuit breaker [A]
Table 4c: Current absorption and thermal magnetic circuit breaker sizing for maximum power
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.
2.2.1.1
Connection to the power line AD 2.2 AC - 1.5 AC - 1.0 AC
The inverter must be connected to the single-phase power line by means of a 3-core cable (phase neutral + earth). The relative line
specifications must correspond to those shown in Table 1.
The input terminals are those marked with the text LN and an arrow pointing towards the terminals; see
Figure 4.
The section, type and laying of cables for inverter power supply and electric pump connections must be selected in compliance with
current standards. Table 2 provides indications on the cable section to be used. The table refers to cables in PVC with 3-core cable
(phase neutral + earth)with the minimum recommended section based on the current and length of cable.
The current supply to the inverter can generally by estimated (with a relative safety margin) at 2.5 times the current absorbed by the
three-phase pump. For example, if the pump connected to the inverter absorbs 10A per phase, the inverter power supply cables should
be sized for 25A.
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.
ENGLISH
AD 2.2 AC
230 V
11,0
25,0
32
AD 5.5 AC
380
15,0
20,5
25
AD 15.0 AC
380
41,0
55,0
63
Figure 6: Electrical connections
75
AD 1.5 AC
230 V
9,0
18,7
20
AD 4.0 AC
480
380
480
11,5
11,0
8,7
16,5
16
12,0
20
20
16
AD 11.0 AC
480
380
480
32,5
31,0
24,5
44,0
42,0
33,0
50
50
40
AD 1.0 AC
230 V
6,5
12,0
16
AD 3.0 AC
380
480
9,0
7,2
12,5
10,0
16
16
AD 7.5 AC
380
480
22,0
17,5
29,5
23,5
32
25
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