DAB MCE-150/C Instrucciones De Instalación Y Mantenimiento página 42

The section, type and laying of the cables for supplying power to the inverter and connecting to the
electropump must be chosen according to the regulations in force. Table 2 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 supply current to the MCE-150/C may be assessed in general (allowing a safety margin) as 1/8 more
than the current absorbed by the pump.
Although the MCE-150/C has its own internal protections, it is still advisable to install a suitably sized thermal
magnetic circuit breaker.
ATTENTION: The thermal magnetic circuit breaker and the power cables of the MCE-150/C and of the pump
must be of a size suited to the system; if the indications given in the manual do not agree with the regulation
in force, use the regulation as reference.
5.2 Connection to the Electropump
The connection between the MCE-150/C and the electropump is made with a 4-core screened cable (3
phases + earth).
At output an electropump must be connected to a three-phase power supply with the characteristics
specified in Table 1.
The output terminals are the ones marked with the words PUMP UVW and with an arrow leaving the
terminals, see Figure 1.
The rated voltage of the electropump must be the same as the MCE-150/C power supply voltage.
The utility connected to the MCE-150/C must not absorb a current higher than the maximum that can be
supplied, indicated in Table 1.
Check the data plates and the type of connection (star or delta) of the motor used to respect the above-
mentioned conditions.
The incorrect connection of the earth lines to a terminal other than the earth terminal
may cause irremediable damage to the whole equipment.
The incorrect connection of the power supply line to the output terminals intended for
the load may cause irremediable damage to the whole equipment.
It is recommended to install a differential switch to protect the system, which must
have correct dimensions, such as: Class A (AS for models with three-phase power
supply), with adjustable leakage current, selective, protected against sudden tripping.
The automatic differential switch must be marked with the following two symbols:
5.3 Earth Connection
The earth connection must be made with cable lugs tightened as shown in Figure 2.
ENGLISH
Figure 2: Earth connection
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