455-461 Series
4.5.3 Power supply
The wiring diagram of the voltage between terminals 8 and 9 (220 V) or 8 and 10 (voltage
other than 220 V) provides the power supply:
• o f the electronic drive (see fig. 4.3)
• o f the fan (for fan-cooled units)
• o f the partial load failure detection circuit (for the 461 series).
Terminal 8 is the neutral or the reference phase, while terminal 9 is only used when the
electronic control is powered with 200 - 260 V.
Terminals 8 and 10 are used for the voltages other than the 200-260 V range (110 or 400 V,
for example).
This voltage is specified in the unit code.
Warning
• The phases arriving on terminals 8, 9 or 8, 10 must be the same as those
which are present on the unit power terminals, especially when several
units are distributed between several phases of a three-phase supply.
• The drive power must be switched on after or at the same time as the
power.
• The drive power must be switched off before or at the same time as the
power.
451-461 User Manual
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