Programmable Protection Functions - ABB ACQ80-04 Firmware Manual

46 Program features
Settings
Parameter group 35 Motor thermal protection
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Programmable protection functions

External events (parameters 31.01...31.10)
Five different event signals from the process can be connected to selectable inputs to
generate trips and warnings for the driven equipment. When the signal is lost, an
external event (fault, warning, or a mere log entry) is generated.
Motor phase loss detection (parameter 31.19)
The parameter selects how the drive reacts whenever a motor phase loss is detected.
Earth (Ground) fault detection (parameter 31.20)
Note that
• an earth fault in the supply cable does not activate the protection
• in a grounded supply, the protection activates within 2 milliseconds
• in an ungrounded supply, the supply capacitance must be 1 microfarad or more
• the capacitive currents caused by shielded motor cables up to 300 meters will not
activate the protection
• the protection is deactivated when the drive is stopped.
Supply phase loss detection (parameter 31.21)
The parameter selects how the drive reacts whenever a supply phase loss is
detected.
Safe torque off detection (parameter 31.22)
The drive monitors the status of the Safe torque off input, and this parameter selects
which indications are given when the signals are lost. (The parameter does not affect
the operation of the Safe torque off function itself). For more information on the Safe
torque off function, see section Implementing the Safe torque off function in the
Hardware manual of the drive.
Swapped supply and motor cabling (parameter 31.23)
The drive can detect if the supply and motor cables are swapped accidentally (for
example, if the supply is connected to the motor connection of the drive). The
parameter selects if a fault is generated or not.
Current limit function (parameters 30.09, 30.17, and 30.10)
The drive monitors the maximum current limit and its related parameters, and helps
the motor not to reach its stall current limit. The maximum current, monitoring time,
(page 120).