ABB ACS880-07CLC, Hardware Manual

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• switch-disconnector, with or without fuses, in accordance with IEC 60947-3, utilization
category AC-23B or DC-23B
• control and protective switching device suitable for isolation, in accordance with
IEC 60947-6-2
• a circuit-breaker suitable for isolation in accordance with IEC 60947-2
• any other switching device in accordance with an IEC product standard for that device
and which meets the isolation requirements and the appropriate utilization category
and/or specified endurance requirements defined in the product standard.
Selecting the main contactor or breaker
The installer must provide an external main contactor or breaker as the drive does not have
an internal main contactor or breaker.
Obey these guidelines when you select the main contactor (breaker):
• Dimension the contactor (breaker) according to the nominal voltage and current of the
drive. Also consider the environmental conditions such as ambient temperature.
• Select contactor/breaker with utilization category AC-1 (number of operations under
load) according to IEC 60947-4, Low-voltage switch gear and control gear.
• Consider the application life time requirements.
See also section Contact data for main contactor/breaker control (page 164) .
Examining the compatibility of the motor and drive
Use an asynchronous AC induction motors, permanent magnet synchronous motors, AC
induction servomotors or ABB synchronous reluctance motors (SynRM motors) with the
drive.
Select the motor size and drive type from the rating tables on basis of the AC line voltage
and motor load. Use the DriveSize PC tool if you need to tune the selection more in detail.
Make sure that the motor withstands the maximum peak voltage in the motor terminals. See
section
Requirements table (page 67) . For basics of protecting the motor insulation and
bearings in drive systems, see section Protecting the motor insulation and bearings (page 66) .
Note:
• Consult the motor manufacturer before using a motor whose nominal voltage differs
from the AC line voltage connected to the drive input.
• The voltage peaks at the motor terminals are relative to the supply voltage of the drive,
not the drive output voltage.
• If the motor and drive are not of the same size, consider the operation limits of the drive
control program for the motor nominal voltage and current. See the appropriate
parameters in the firmware manual.
￭ Protecting the motor insulation and bearings
The drive employs modern IGBT inverter technology. Regardless of frequency, the drive
output comprises pulses of approximately the drive DC bus voltage with a very short rise
time. The pulse voltage can almost double at the motor terminals, depending on the
attenuation and reflection properties of the motor cable and the terminals. This can cause
additional stress on the motor and motor cable insulation.
66 Guidelines for planning the electrical installation