ABB PSTX720 - Page 119

1SFC132081M0201 | Installation and commissioning manual | Functions 119
7.19.1 Internal faults
7.19.1.1 Shunt fault
The Softstarter has been shorted and cannot stop the
power to the motor.
If Softstarter is connected in-line, shunt fault is on if 2 or
3 phases are shorted.
If Softstarter is connected inside-delta, shunt fault is on if
1 or more phases are shorted.
If the user puts shunt fault on 1 relay and connect it to a
line contactor or a circuit breaker, the user can break off
the motor.
Speak to ABB sales office for service.
Shunt fault has these parameters:
Parameter Description Setting range Default value
25.01 Shunt fault out
Identifies the Event groups this
fault is part of.
Eventgroup 0 ... 6 0000001
25.02 Shunt fault op
Sets the operation of this fault.
Stop manual, Stop
auto.
Stop manual
7.19.1.2 Short circuit fault
The Softstarter has a short circuit or bypass. The
Softstarter can run in Limp mode function, even if 1
phase become shorted.
INFORMATION
If Automatic restart is set to on, a short circuit
fault will automatically start the motor again.
For more information about Automatic restart, see
chapter 7.13 Automatic restart.
If 1 or multiple thyristors are shorted, speak to ABB sales
office for service.
Short circuit fault has these parameters:
Parameter Description Setting range Default value
25.03 Short circuit out
Identifies the Event groups this
fault is part of.
Eventgroup 0 ... 6 0000001
25.04 Short circuit fault op
Sets the operation of this fault.
Stop manual, Stop
auto
Stop manual
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