ABB PST Series Installation And Commissioning Manual page 142

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If one or several thyristors are shorted, this parameter
makes it possible to select between two different actions
of the softstarter.
Stop–M
Stop–A
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SCR SC Stop–M
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The motor stops and a manual reset is
required before restart.
The motor stops and an automatic reset is
performed when the fault disappears.
Stop–M, Stop–A
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Type of opera-
tion for thyristor
short circuit fault