ABB PSTX30 Installation And Commissioning Manual page 92

7.15 Protections
The softstarter is equipped with a number of protection
functions to protect the softstarter, motor and other
equipments.
A protection can be completely turned off, configured to
stop the motor, or indicate that the event has occurred.
There are two options if the protection shall stop the
motor: either a manual reset is required, or the softstarter
will automatically reset the protection when the protection
goes inactive, i.e. when the conditions that triggered the
event are gone.
In addition to the type of operations mentioned above,
which are avilable for all protections, some protections
have more options.
When the protection acts as a warning, it will indicate that
something is wrong.
When the protection acts as a fault, it will stop the motor
when fault occur (Direct stop).
Protections can be enabled or disabled by the user.
The protection parameters can only be configured if the
protection is activated.
When any of the protections signals a risk of damage, the
following basic actions will be performed:
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- Protection LED will light up
- The type of event is displayed
- The type of event is logged on the event list
Protections can be set to have automatic reset or manual
reset. For every protection, there is parameter options
called Operation, which can be set as:
• Stop-Automatic – The engine stops and reset
automatic after the fault condition has been
corrected*.
• Stop-Manual – The engine stops and have to be reset
manually after the fault condition has been corrected*.
• Off
• Indication
* You cannot reset a fault before the fault condition
is corrected. Example: If stop-manual is set at EOL
Fault (engine is too warm) you can only reset the
softstarter once the engine has cooled down to the
right temperature.
Protections can be set to an Event group by a parameter
option called Out. The Event group can be configured for
relay output to control other devices in an application.
As default all parameters are set to one Eventgroup.
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