DAB PUMPS PWM 203, Instruction For Installation And Maintenance

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ENGLISH
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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 n 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 3 which specifies the type of thermal magnetic cut-out to be used according to current values.
CAUTION: The thermal magnetic circuit breaker and power cables of the inverter and pump must be sized according to the system.
The differential switch that protects the system must be adequately sized and must be of “ Class A ” type. The automatic differntial
switch must be marked with the following two symbols:
If the instructions supplied in this manual are in contrast with the regulations in force the regulations must be considered as valid.
Power supply cable section in mm²
10 m 20 m 30 m 40 m 50 m 60 m 70 m 80 m 90 m 100 m 120 m 140 m 160 m 180 m 200 m
4 A
1,5 1,5 1,5 1,5 2,5 2,5 2,5 2,5 4 4 4 6 6 6 10
8 A
1,5 1,5 2,5 2,5 4 4 6 6 6 10 10 10 10 16 16
12 A
1,5 2,5 4 4 6 6 10 10 10 10 16 16 16
16 A
2,5 2,5 4 6 10 10 10 10 16 16 16
20 A
4 4 6 10 10 10 16 16 16 16
24 A
4 4 6 10 10 16 16 16
28 A
6 6 10 10 16 16 16
Data concerning 3-core PVC cables (phase earth)
Table 2: Single phase line power cable section
2.2.1.2 Connection to the power line PWM 420 – 415 – 410 – 407 – 405 – 404
The inverter must be connected to the 3-phase power line by means of a 4-core cable (3 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 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 4 provides indications on the cable section to be used. The table refers to cables in PVC
with 4 wires (3 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 3 also indicates the sizes of thermal magnetic circuit breakers to be used, according to the current absorption.
CAUTION: The thermal magnetic circuit breaker and power cables of the inverter and pump must be sized according to the system.
The differential switch that protects the system must be adequately sized and must be of “ Class AS” type. The automatic differntial
switch must be marked with the following two symbols:
If the instructions supplied in this manual are in contrast with the regulations in force the regulations must be considered as valid.
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 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 4.
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 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.