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“Power+” +0500048IE - rel 2.2 - 06.11.2014
ENG
3.8 Electrical connections
For installation proceed as shown below, with reference to the general connection diagram (par. 3.9).
Important:
the following warnings must be observed when connecting the drive:
• separate as much as possible the probe and digital input cables (at least 40 cm) from the power cables to avoid
possible electromagnetic disturbance. Never lay power cables (including the electrical panel cables) and probe
signal cables in the same conduits;
• the cables must be sized according to the table in paragraph 5.1;
• when the fuses are used, these must be chosen according to the data shown in the table in paragraph 5.1, and
must comply with the national and local standards in force (in general use type gG fuses for IEC and see Chap. 6
for UL);
• when a magnetic circuit breaker (MCB) is used, it must be of type B, rated according to the data shown in the table
in paragraph 5.1;
• avoid installing cables connected to the control terminal block in the immediate vicinity of power devices
(contactors, circuit breakers, etc.). Reduce the path of the cables as much as possible, and avoid spiral paths that
enclose power devices.
Use cables rated to 90 °C, and if the temperature of the terminals exceeds 85 °C, use cables rated to 105 °C. Use cable
terminals suitable for the terminals and the cables used. Loosen each screw and insert the cable ends, then tighten
the screws and lightly tug the cables to check correct tightness. The drive must be earthed: to do this, use either the
screw terminal (earth symbol ), or the screw (PE symbol ) on the side of the heat sink, in accordance with local
standards in force. To minimise EMC problems, use a shielded power cable with earth wire included, connected
to terminal . The power supply earth must be connected directly to the earth bar in the electrical panel, without
branches to other devices; the earth wire size must be greater than or equal to the phase wires; the earth impedance
must be compliant with national and local standards; in compliance with UL requirements, the protective earth
connections (PE) must be made using eyelet lugs.
Power supply
Connect the power supply cables: for PSD10122** and PSD10162** connect the power supply to terminals L1/L and
L2/N, for PSD10184** e PSD10244** to terminals L1, L2, L3; for the size of the cables and the type of fuses, see the
table in paragraph 5.1.
To ensure conformity to the EMC directive, use shielded cable with tape + braid shields (SN/ST). The cable can also
be laid in steel and copper cableways.
Earth the shield with 360° a metal clamp on both ends of the cable, as close as possible to the terminals. In case of
connection of the shield to the drive earth terminal (not recommended) , the shield has to be twisted. The twisted
part must be left as short as possible, and the length must not exceed fi ve times the width.
For PSD10122** and PSD10162** it is recommended to use a ferrite cable core (e.g. Fair-Rite 2646665702) rounding
earth wire only, located just in front of the drive earth terminal .
Important:
• do not connect the power supply to terminals U, V, W;
• make sure the voltage, frequency and number of phases in the power supply match the ratings of the specifi c
model.
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