Hitachi SJ Series, User Manual

Page: 350 / 786

12-16-1
Chapter 12 Inverter Function
12.16 Using Protection Functions
12.16.1 Detecting input phase loss
• How to prevent system failure due to unstable
motor operation when a phase loss occurs by
breakage of the input power cable
• Enable the input phase loss protection function by
using [bb-65] Input phase loss protection
selection.
• When the input phase loss protection function has
been enabled, an input phase loss error [E024]
will occur if a phase loss state due to
disconnection or breakage of the input power
cable continues for 1 second or more.
Parameter
• When 3-phase AC is not input to power supply
terminals R, S, and T, such as in cases where DC
voltage is input to R and T or between P and N of
the inverter, this function is disabled regardless of
the setting for [bb-65].
• There will be no detection during an instantaneous
power failure.
• If an input phase loss error [E024] occurs, it is
necessary to cut off the power supply to the
inverter and check the state of wiring and
breakers.
Item Parameter Data Description
Input phase loss
protection selection
[bb-65]
00 Disabled
01 Enabled
Q
A
!