Technical data
401
ACH550-01 User's Manual
Input power (mains) cable, fuses and circuit breakers
A four conductor cable (three phases and earth/protective earth)
is recommended for the input power cabling. Shielding is not
necessary. Dimension the cables and fuses in accordance with
the input current. Always pay attention to local codes when
sizing the cables and fuses.
The input power connectors are at the bottom of the drive. Input
power cable routing must be done so that the distance from the
sides of the drive is at least 20 cm (8 in) to avoid excessive
radiation to the input power cable. In the case of shielded cable,
twist the cable shield wires together into a bundle (pigtail) not
longer than five times its width and connect to the PE terminal of
the drive (or PE terminal of input filter, if present).
Line current harmonics
Standard ACH550 drive without any additional options meets
IEC/EN 61000-3-12 limits for harmonic currents. The standard
can be met with a transformer short circuit ratio of 120 or higher.
The harmonic levels under rated load conditions are available
on request.
Fuses
Branch circuit protection must be provided by the end-user,
sized in accordance with the NEC and local codes.
Recommendations for fuses for short-circuit protection on the
mains cable are in the following tables.
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