Protection Against Short-Circuit In The Motor And Motor Cable; Thermal Overload Protection Of The Motor - ABB ACS350 User Manual

Protection against short-circuit in the motor and motor cable

The drive protects the motor and motor cable in a short-circuit situation when the
motor cable is dimensioned according to the nominal current of the drive. No
additional protection devices are needed.

Thermal overload protection of the motor

According to regulations, the motor must be protected against thermal overload and
the current must be switched off when overload is detected. The drive includes a
motor thermal protection function that protects the motor and switches off the current
when necessary. It is also possible to connect a motor temperature measurement to
the drive. The user can tune both the thermal model and the temperature
measurement function further by parameters.
The most common temperature sensors are:
• motor sizes IEC180...225: thermal switch (e.g. Klixon)
• motor sizes IEC200...250 and larger: PTC or Pt100.
For more information on the thermal model, see section
on page 116. For more information on the temperature measurement function see
section Motor temperature measurement through the standard I/O
Motor Thermal Protection
on page 124.
Planning electrical installation
31