Softstarters Type PSE18...PSE370 Installation and commissioning manual 1SFC132057M0201
68 Chapter 7
7.5.10
Underload Protection
When active the Underload Protection trip if the current (Ie) 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
Setting
range
Description
OFF
OFF, 0.2...1
x Ie
Level of Underload Protection
HAnd
HAnd/Auto
Type of operation for reset of
Underload Protection
1
1. HAnd = Manual reset:
_
When tripping will stop the motor, a manual reset is
required before restart can be done.
Auto = Automatic reset:
_
When tripping will stop the motor, an automatic reset is
performed before the unit is ready for restart.
Figure 7.23: Underload Protection param-
eter displayed
Figure 7.24: Type of operation for reset of Un-
derload Protection fault parameter displayed
