ENGLISH
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4.1
Electromagnetic Compatibility (EMC)
MCE/C inverters respect standard EN 61800-3, in the C2 category, for electromagnetic compatibility.
-
Electromagnetic emissions. Residential environment (in some cases restrictive measures may be requested).
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Conducted emissions. Residential environment (in some cases restrictive measures may be requested).
5.
ELECTRICAL CONNECTIONS
Always switch off the mains power supply before working on the electrical or mechanical part of the system. Before
opening the equipment, wait at least 5 minutes after disconnecting it from the power supply. The capacitor of the
direct current intermediate circuit remains charged with dangerously high voltage even after the mains power has
been turned off.
Only firmly cabled mains connections are admissible. The appliance must be earthed (IEC 536 class 1,
NEC and other applicable standards).
Ensure that the voltage and frequency on the data plate of the MCE-22/C are the same as those of the
power mains.
5.1
Connection to the Power Supply Line
The connection between the single-phase power supply line and the MCE-22/C must be made with a 3-core cable (phase + n
earth). The characteristics of the power supply must satisfy the indications in
Table 1.
The
input terminals
are the ones marked with the words
LINE LN
and with an
arrow entering
the terminals, see
Figure 1
.
Figure 1: Electrical connections
The minimum section of the input and output cables must be such as to guarantee correct tightening of the cable clamps, while the
maximum section accepted by the terminals is 4mm
2
.
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. The table 2 supplies an indication on the section of the cable to be used to supply power to the
inverter. The table refers to 3-core PVC cables (phase + n 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 maximum supply current of the MCE-22/C may generally be estimated as double the maximum current absorbed by the pump.
Although the MCE-22/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-22/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-22/C and the electropump is made with a 4-core cable (3 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-22/C power supply voltage.
The utility connected to the MCE-22/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.
Table 3
supplies an indication on the section of the cable to be used to connect to the pump. 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.
