Electromagnetic Compatibility (Emc); Electrical Connections; Connection To The Power Supply Line; Connection To The Electropump - DAB MCE-50/C Installations- Und Wartungsanleitungen

4.1

Electromagnetic Compatibility (EMC)

MCE 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).
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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 10 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-55/C are the same as those of the
power mains.
5.1

Connection to the Power Supply Line

The connection between the three-phase power supply line and the MCE-55/C must be made with a 4-core cable (3 phases + 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 RST and with an arrow entering the terminals, see Figure 1.
The maximum section accepted by the input and output terminals is 6 mm².
The external diameter of the input and output cables accepted by the cable glands for correct tightness varies from a minimum of 11
mm to a maximum of 17 mm.
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-55/C may be assessed in general (allowing a safety margin) as 1/8 more than the current absorbed by
the pump.
Although the MCE-55/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-55/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-55/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-55/C power supply voltage.
The utility connected to the MCE-55/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.
ENGLISH
Figure 1: Electrical connections
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