ABB PSTX30 Installation And Commissioning Manual page 110

7.17.2 External faults
Phase loss fault
7.17.2.1
Voltage to one or more phases missing. For example, this
detects an open line contactor.
Check that the mains are connected. Check that no line
contactor or breaker is open.
Phase loss fault is configured with the following
parameters:
Parameter
26.01 Phase loss out
26.02 Phase loss op
Bad network fault
7.17.2.2
Bad network quality fault is signaled if there is too much
frequency disturbance in the network. Then it will be too
dificult to control the triggering of the thyristors in a safe
way.
Check for harmonics or frequency disturbance in the
supply network.
Bad network fault is configured with the following
parameters:
7
Parameter
26.03 Bad network out
26.04 Bad network op
Low supply voltage fault
7.17.2.3
Too low control supply voltage on terminals 1 and 2.
A fault signal will be given if the softstarter detects that
the control supply voltage is too low. Then it will stop the
motor and save unsaved data. However, if the control
supply voltage goes up before the softstarter is completely
turned off, the low supply voltage fault will be activated.
If the voltage is too low, it can no longer assure proper
function of the softstarter and this fault is signaled. This
fault can only be asserted after some time, since low
voltage will also be detected when the softstarter is
unplugged and shutdown.
Check for voltage dips or interruptions.
Low supply fault is configured with the following
parameters:
Parameter
26.05 Low supply voltage out
26.06 Low supply voltage op
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Description
Specifies the Event groups this
fault belongs to.
Set the operation of this fault.
Description
Specifies the Event groups this
fault belongs to.
Set the operation of this fault.
Description
Specifies the Event groups this
fault belongs to.
Sets the operation of this fault.
Setting range Default value
Eventgroup 0 ... 6 1
Stop manual, Stop Stop manual
auto
Setting range Default value
Eventgroup 0 ... 6 1
Stop manual, Stop Stop manual
auto
Setting range Default value
Eventgroup 0 ... 6 1
Stop manual, Stop Stop manual
auto