ABB ACS880-14, Hardware Manual

Page: 91 / 248

For more information, see drive firmware manual.
Protecting the drive and the input power cable in
short-circuits
Protect the drive (1) with fuses (a) and the input cable with fuses (b) or a circuit breaker.
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M
3~
b a
1
Size the fuses or the circuit breaker according to local regulations for the input cable
protection. Select the fuses for the drive according to the instructions given in the technical
data. The fuses for the drive protection will restrict drive damage and prevent damage to
adjoining equipment in case of a short-circuit inside the drive.
Note: Circuit breakers must not be used without fuses.
WARNING!
Due to the inherent operating principle and construction of circuit breakers,
independent of the manufacturer, hot ionized gases can escape from the breaker
enclosure in case of a short-circuit. To ensure safe use, pay special attention to
the installation and placement of the breakers. Obey the manufacturer’s instructions.
Protecting the drive against thermal overload
The drive has overload protection as standard.
Protecting the input power cable against thermal overload
The drive has overload protection as standard. If the sizing of the input power cable is
correct, the drive overload protection protects also the cable against overload. In case of
parallel input power cables, it may be necessary to protect each cable separately. Obey the
local regulations.
Implementing a motor temperature sensor connection
WARNING!
IEC 61800-5-1 requires double or reinforced insulation between live parts and
accessible parts when:
• the accessible parts are not conductive, or
• the accessible parts are conductive, but not connected to the protective earth.
Obey this requirement when you plan the connection of the motor temperature
sensor to the drive.
You have these implementation alternatives:
Guidelines for planning the electrical installation 91