Underload Protection - ABB PSE 18 Installation And Commissioning Manual

Figure 7.23: Underload Protection param-
eter displayed
Figure 7.24: Type of operation for reset of Un-
derload Protection fault parameter displayed
68 Chapter 7 Softstarters Type PSE18...PSE370 Installation and commissioning manual 1SFC132057M0201

7.5.10 Underload Protection

When active the Underload Protection trip if the current (I e ) will fall to a lower level
than the set value for 30 seconds or more.
This protection could be used to avoid for example a pump running dry,
detect a broken belt or similar.
There is an option for type of reset after tripping, hand or automatic. HAnd is
default value for reset of Locked Rotor Protection after tripping.
Display Default
value
OFF
HAnd
1. HAnd = Manual reset:
Auto = Automatic reset: _ When tripping will stop the motor, an automatic reset is
Setting Description
range
OFF, 0.2...1 Level of Underload Protection
x I e
HAnd/Auto Type of operation for reset of
Underload Protection
_ When tripping will stop the motor, a manual reset is
required before restart can be done.
performed before the unit is ready for restart.
1