3
vacon • 14 Receipt of delivery
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
3.4 Storage
If VACON
®
NX Active Front End is to be stored before use, make sure that the ambient conditions
are acceptable:
If you must keep the VACON
®
NX Active Front End in storage for a long time, you must connect the
power to the VACON
®
NX Active Front End each year. Keep the power on for a minimum of 2 hours.
We do not recommend a long storage time. If the storage time is more than 12 months, you must
charge the electrolytic DC capacitors with caution. To reform the capacitors, obey the instructions
in Chapter 3.4.1 Capacitor reforming.
3.4.1 Capacitor reforming
After a long storage time, it is necessary to reform the capacitors to prevent damage to the
capacitors. To make sure that the possible high leakage current through the capacitors stays in
minimum, use a DC-power supply with an adjustable current limit.
1. Set the current limit to 300-800mA to agree with the size of the drive.
2. Connect the DC-power supply to the B+/Bterminals (DC+ to B+, DC- to B-) of the DC-link or
directly to the capacitor terminals.
3. Set the DC-voltage to the nominal DC-voltage level of the Active Front End (1.35*Un AC) and
keep the power on for 1 hour, at minimum. If the Active Front End was in store for much longer
than 12 months and the capacitors were not charged, speak to the factory to get instructions
before you connect the power.
Storage temperature –40…+70 °C (-40...+158°F)
Relative humidity 0 to 95%, no condensation
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