Safety And Protections; Fixed/Standard Protections; Emergency Stop - ABB ACS280 Firmware Manual

Safety and protections



Fixed/Standard protections

Overcurrent
If the output current exceeds the internal overcurrent limit, the IGBTs are shut
down immediately to protect the drive.
DC overvoltage
Overvoltage control
See section
DC undervoltage
Undervoltage control (power loss ride-through)
See section
Drive temperature
If the temperature rises high enough, the drive first starts to limit the switching
frequency and then the current to protect itself. If it is still keeps heating up, for
example because of a fan failure, an overtemperature fault is generated.
Short circuit
In case of a short circuit, the IGBTs are shut down immediately to protect the
drive.
Earth (Ground) fault detection
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.


Emergency stop

The emergency stop signal is connected to the input selected by parameter
21.05 Emergency stop source
through fieldbus (parameter
69
on page .
. An emergency stop can also be generated
06.01 Main control word
Program features 73
69
on page
, bits 0...2).
.