LSIS 6731001500, User Manual

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238
Learning Advanced Features
Code Description
CON-78
KEB Start Lev,
CON-79
KEB Stop Lev
Sets the start and stop points of the kinetic energy buffering operation. The set
values must be based on the low voltage trip level at 100%, and the stop level
(CON-79) must be set higher than the start level (CON-78).
CON-80
KEB Slip Gain Used to prevent malfunctions caused by low voltage from initial kinetic energy
buffering occurring due to power interruptions.
CON-81
KEB P Gain
Used to maintain the voltage during the kinetic energy buffering operation. It
operates the inverter by modifying the set value to prevent malfunctions
caused by low voltage after power interruptions.
CON-82
KEB I Gain
Used to maintain the voltage during the kinetic energy buffering operation.
Sets the gain value to maintain the operation until the frequency stops during
the kinetic energy buffering operation.
CON-83
KEB Acc Time Sets the acceleration time for the frequency reference when the inverter’s
operation becomes normal after the kinetic energy buffering operation.
Note
•
The KEB functions may perform differently depending on the size of the loads. The KEB Gains can
be set for a better performance.
•
If a low voltage trip occurs after a power interruption, it indicates the load inertia and level are
high. In such cases, the KEB functions can be performed better by increasing the KEB I Gain and
the KEB Slip Gain.
•
If motor vibration or torque variation occurs during the KEB function operation after power
interruptions, the KEB functions can be performed better by increasing the KEB P Gain or
decreasing the KEB I Gain.
Depending on the duration of instantaneous power interruptions and the amount of load inertia, a low
voltage trip may occur even during a kinetic energy buffering operation. Motors may vibrate during
kinetic energy buffering operation for some loads, except for variable torque loads (for example, fan or
pump loads).