Storage - Vacon NX Active Front End User Manual

vacon • 12
3.4

Storage

®
If Vacon NX Active Front End is to be stored before use, make sure that the ambient conditions are
acceptable:
Storage temperature –40...+70 °C
Relative humidity
When the Active Front End unit is stored without voltage being applied, the recharging of the
capacitors should be done at least once a year by connecting voltage into the unit and keeping it
powered at least for 1hour.
If the storing time is much longer than one year, the recharging of the capacitors has to be carried
out so that the possible high leakage current through the capacitors is limited. The best alternative
is to use DC-power supply with adjustable current limit. Current limit has to be set for example to
300...500 mA and DC-power supply has to be connected to the B+/B- terminals (DC supply
terminals). DC-voltage must be adjusted up to nominal DC-voltage level of the unit (1.35*U
shall be supplied at least for 1 hour.
If DC power supply with current limiting is not available and unit has been stored much longer than
1 year de-energized, consult factory before connecting the power.
3
<95%, no condensation
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
Receipt of delivery
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