Electrical Connections To The Pump - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

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 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 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.
2.2.1.4 Electrical connections to the electric pump PWM 203 – 202 – 201
Models PWM 203 – 202 – 201 require motor configuration for a three-phase voltage of 230V. This is
normally obtained by a delta configuration of the motor. See Figure 5.
Incorrect connection of the earthing line, to a terminal other than the earth terminal can
cause irremediable damage to the equipment.
Incorrect connection of the power line on the output load terminals can cause irremediable
damage to the equipment.
ENGLISH
Figure 5: Pump connection PWM 203 - 202 – 201
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