Lenze EDB9300UES User Manual

Page 115

Operation and Software

110

BA8230

Kinetic back-up

This parameter activates kinetic back-up. In the event of brief mains failure this
function provides a bridge using kinetic energy, i.e. the rotating mass in the drive
system. The output frequency is regulated so that system losses are covered by over-
synchronous operation of the motor. The link voltage get back-up. The drive speed
drops during back-up. If the mains supply returns during the support period, the 8230
frequency inverter runs the drive to the preset speed demand using the ramp time set.
The demand for the magnetising current controller is reduced as standard to 85 % of
the value while back-up is active. This further lengthens the support time through
power conservation.

Operation of the control electronics is supported by the energy drawn from the drive
during its controlled run-down.
The back-up signal is generated internally by monitoring the link voltage.

Select list:

- Yes
- No

As supplied:

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