LSIS 6731001500, User Manual

Page: 344 / 659

331
Learning Protection Features
6.2 Inverter and Sequence Protection
6.2.1 Open-phase Protection
Open-phase protection is used to prevent over current levels induced by the inverter inputs due
to an open-phase within the input power supply. Open-phase output protection is also available.
An open-phase at the connection between the motor and the inverter output may cause the
motor to stall, due to a lack of torque.
Group Code Name LCD Display Parameter Setting Setting range Unit
PRT
05
Input/output open-
phase protection
Phase Loss Chk 00 - bit
06
Open-phase input
voltage band
IPO V Band 40 1–100 V V
Input and Output Open-phase Protection Setting Details
Code Description
PRT-05 Phase Loss
Chk
PRT-06 IPO V Band
When open-phase protection is operating, input and output configurations are
displayed differently. When the LCD segment is On, the corresponding bit is set
to ‘Off’.
Item Bit status (On) Bit status (Off)
Keypad
display
Setting Function
Bit 2 Bit 1
Output open-phase protection
Input open-phase protection