LS ELECTRIC SV-iS7 Series, Руководство пользователя, Страница: 351 / 491

Using Protection Features
334
Code Description
PRT-05 Phase Loss
Chk
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 Keypad
display Function
Bit 2 Bit 1

Output open-phase protection. If one or more
than one phase from U, V, and W is open, the
inverter output will be blocked and
“ Out Phase
Open ” will be displayed on the keypad.

Input open-phase protection. If one or more
phases from R, S, and T are open, the inverter
output will be blocked and
“ In Phase Open ” will
be displayed on the keypad. Protection against
input phase open starts only when a certain
amount of current (70
– 80% of the inverter-rated
output current) flows through the motor.
 
Input and output open-phase protection
PRT-06 IPO V Band
Sets the band of the allowed ripple voltage. If one or more phases from the
inverter output are open, the ripple of the DC link voltage increases. If ripple
voltage exceeds the set ripple voltage band, an input phase open trip occurs.
The IPO V Band may be adjusted depending on the operating environment.
Sets the IPO V Band 1 – 10 volts higher if the output load is too large for the
input capacity, and an open phase fault trip occurs during a normal
operation.
Sets the IPO V Band 1
– 10 volts lower if the output load is too smaller for the
input capacity.
Note
Ensure that the motor-rated current (BAS-13 Rated Curr) is correctly set. Phase open protection may
not be operated properly i
f the motor’ s rated current is not correctly set at BAS-13.