Hitachi SJ Series User Manual page 322

Chapter 12
12.13.9 Restarting after overvoltage
Q
• Overvoltage occurs rarely, but I want to restart
continuously as it is since there is no problem in the
system.
• I want the system continue to function in case of
overvoltage.
A
• In case of overvoltage, you can restart without
causing tripping.
Parameters
Item Parameter
Overvoltage tripping
selection
Overvotage tripping
retry selection
Overvoltage retry
standby time
(Ex. 1) When [bb-23] = 00, tripping occurs
P-N
Inverter
Output
Motor Speed
[AL]
Data
[bb-23] 0~5 (Counts)
00
01
02
[bb-30]
03
04
[bb-31] 0.3~100.0(s)
Overvoltage Detection Level
Overvoltage error occurs
Free Running
12-13-15
!
• If overvoltage continues to be observed, there are
some possible causes: short deceleration time,
heavy load, motor operated by external force, etc.
Description
Sets the retry counts in case of overvoltage. If this is
set to 0, the motor will trip upon overvoltage.
Restarts at 0 Hz
Restarts with the frequency matching
Restarts upon frequency pull-in
Detection speed (frequency) <v2.00 or higher>
Trips after decelerating and stopping with the
frequency matching
Restarts after waiting for the set time upon
overvoltage.
(Ex. 2) When [bb-23] ≠00 and [bb-30] = 00, it restarts
at 0 Hz.
P-N Voltage
Inverter
Output
Motor Speed
Retry Standby Time
[AL]
Inverter Function
Overvoltage Detection Level
Free Running