ABB ACH550-02-645A-4 Руководство пользователя онлайн [11/454] 453994

ABB ACH550-02-645A-4 Руководство пользователя онлайн [11/454] 453994
Contents of this manual 7
ACH550-02 User’s Manual
WARNING! When the control terminals of two or more drive
units are connected in parallel, the auxiliary voltage for these
control connections must be taken from a single source which
can either be one of the units or an external supply.
WARNING! Disconnect the varistor network when installing the
drive on an IT system (an unearthed power system, a high
resistance-earthed [over 30 ohm] power system or a power
system equipped with residual current circuit breakers),
otherwise the system will be connected to earth potential
through the varistor network. This may cause danger or damage
the drive.
Disconnect the varistor network when installing the drive on a
corner-earthed TN system, otherwise the drive will be damaged.
For disconnecting the varistors, see page 53.
WARNING! The ACH550-02 is not a field repairable unit. Never
attempt to repair a malfunctioning unit; contact the factory or
your local Authorized Service Centre for replacement.
WARNING! The ACH550 will start up automatically after an
input voltage interruption if the external run command is on.
WARNING! The heat sink may reach a high temperature. See
chapter Technical data.
WARNING! Do not control the motor with an AC contactor or
disconnecting device (disconnecting means); use instead the
control panel (operator keypad) start (HAND , AUTO )
and stop (OFF ) keys or external commands (I/O or
fieldbus). The maximum allowed number of charging cycles of
the DC capacitors (i.e. power-ups by applying power) is five in
ten minutes.

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