Emergency Operation - gefran AGy -L Manual De Instrucciones

AGy -L is able to operate from a backup power supply (batteries, or single-phase 220Vac) in case of mains fault.
In figure 7.1, typical connection diagram of the Emergency Module MW22 is shown. When using this configuration, the
following parameters have to be changed from default, in order to activate the emergency operation:
- I.005 Freq Sel 3 src = "[0] False"
- I.011 Bak pwr act src = "[7] DI 6"
When the drive detects an Under Voltage condition (either because of a mains fault or because the drive has been
powered up from backup module), if the "Bak Pwr Active" command is active (contactor KB closed), the UV Alarm is
automatically reset and the drive will enter the Emergency Mode.
While in Emergency mode, the drive is able to operate with a low DC-link voltage (supplied from the emergency module).
Operation is exactly the same as in normal mode (Run command and frequency reference are issued as usual), but the
inverter output frequency is clamped by the internal logic to the value specified in parameter F.115 BakPwr max freq.
Note!
While in Emergency Mode, the AC-mains contactor must be open.
If the AC-mains contactor is closed and the power is restored while the drive is still in Emergency Mode, the
input bridge of the inverter may fail due to inrush current of DC-link capacitors.
Once the emergency operation is completed, the drive should be turned off, by opening contactor KB, in order not to
discharge the batteries. When the drive is turned off, the AC mains contactor K1M can be closed, so that the drive is ready
to operate when the power is restored.
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9 - Emergency Operation

AGy -L