ABB PSTX Series Installation And Commissioning Manual page 151

9.2 Service and repair
For repair of the PSTX Softstarter, speak to your ABB
reseller/Office or speak to ABB through
www.abb.com/lowvoltage
WARNING
A short circuit on the load side of the Softstarter
can cause large damage to the unit and cause
danger to personnel.
By using a correctly rated short circuit protection device,
e.g. a fuse or a circuit breaker, the damage is limited to
1 of the 2 categories, specified in IEC 60947-4-2 and EN
60947-4-2:
Type 1: The Softstarter can have damage and it can be
necessary to replace some or all parts.
Type 2: The device can operate after a short circuit.
Type 2: Use a semiconductor fuse to get coordination.
A coordination table is found in the catalogue and online
through:
www.abb.com/lowvoltage
For warranty for damage on the thyristors, the
coordination type 2 is necessary.
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