Underload Protection; Underload Protection Level; Phase Imbalance Protection - ABB PST30 Installation And Maintenance Manual

10
10.8
1SXU 132 021 M0201
Chapter 10
Functions
10:22 Underload protection
Path in menu:
Menu/SETTINGS/Functional Settings/
Protections/Underload
If the motor current falls below the set level and the set time when the motor is running at
full voltage, the protection is activated. The protection starts monitoring when full voltage is
applied to the motor.
Parameter text
Underload
Information!
This protection could be used to avoid for example a pump running dry or detecting a
broken belt.
10:23 Underload protection level
Path in menu:
Menu/SETTINGS/Functional Settings/
Protections/Underload/Underl Lev
This parameter makes it possible to set the level of the underload protection. It is active only
if the underload protection is selected.
Parameter text
Underl Lev
10:24 Underload protection time
Path in menu:
Menu/SETTINGS/Functional Settings/
Protections/Underload/Underl Time
This parameter makes it possible to set the delay time from detection until the protection is
activated. It is active only if underload protection is selected.
Parameter text
Underl Time
10:25 Underload protection, type of operation
Path in menu:
Menu/SETTINGS/Functional Settings/
Protections/Underload/Underl Op
This parameter makes it possible to select between three different actions when the protec-
tion is activated. It is active only if the underload protection is selected.
Parameter text
Underl Op
10:26 Phase imbalance protection
Path in menu:
Menu/SETTINGS/Functional Settings/
Protections/Phase Imb
If the current in one phase differs from another phase by more than the set level, the protec-
tion is activated. The protection starts monitoring 30 seconds after full voltage and trips after
10 seconds of imbalance.
Parameter text
Phase Imb
Default value
No
Default value
0.5 x Ie
Default value
10s
Stop-M The motor stops and a manual reset is required before restart
Stop-A The motor stops and an automatic reset is performed when the fault
disappears
Ind The motor continues to run but a fault indication is given
Default value
Stop-M
Default value Setting range
No Yes, No
Setting range Description
Yes, No

Underload protection

Setting range Description
Trip level for Underload
0.4...0.8xle
protection
Setting range Description
Trip time for Underload
1....30s
protection
Setting range Description
Type of operation for
Stop-M, Stop-A, Ind
Underload protection
Description

Phase imbalance protection

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