Shut Down; Storage; A.6 Shut Down - KEB Combivert F5 series Instruction Manual

Annex
A.6

Shut down

A.6.1 Storage
The DC link of the KEB COMBIVERT is equipped with electrolytic capacitors. If electrolytic capacitors are stored
de-energized, the oxide film working as dielectric fluid reacts with the acidic electrolyte and destroy themselves
slowly. This affects the dielectric strength and the capacity.
If the capacitor starts running with rated voltage, it is tried to build the oxide film abrupt again. This causes heat
and gas and leads to the destruction of the capacitor.
In order to avoid defectives, the KEB COMBIVERT must be started up depending on the storage period in accor-
dance with the following specification:
Storage period < 1 year
• Start-up without special measures
Storage period 1...2 years
• Operate frequency inverter one hour without modulation
Storage period 2...3 years
• Remove all cables from the power circuit; especially of braking resistor or module
• Open control release
• Connect variable transformer to inverter input
• Increase variable transformer slowly to indicated input voltage (>1 min) and remain at least on the specified
time.
Voltage class
Storage period > 3 years
• Input voltages as before, however double the times per year. Eventually change capacitors.
After expiration of this start-up the KEB COMBIVERT can be operated on nominal rating conditions or delivered
to a new storage.
230 V
400 V
690 V
Input voltage
0...160 V
160...220 V
220...260 V
0...280 V
280...400 V
400...500 V
0...420 V
420...600 V
600...760 V
Residence time
15 rpm
15 min
1 h
15 min
15 min
1 h
15 min
15 min
1 h
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