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Storage of Unit
The DC bus of the KEB F5 is equipped with electrolytic capacitors. If the
electrolytic capacitors are stored de-energized, the oxide film working as
a dielectric fluid reacts with the acidic electrolyte and destroys itself slowly.
This affects the dielectric strength and capacity of the unit. If the capacitors
start running with rated voltage again, the oxide film tries to build up quickly.
This causes heat and gas and leads to the destruction of the capacitors.
To avoid failures, the KEB F5 must be started up according to the following
specification based on duration of storage period (powered off):
Storage Period: < 1 Year
Start up normally, without any additional precautions
Storage Period: 1 - 2 Years
Power on frequency inverter for one hour without any modulation
Storage Period: 2 - 3 Years
Remove all cables from power circuit, including braking resistor connections
Remove drive enable command
Connect variable voltage supply to inverter input
Increase voltage slowly to indicated input level and remain for specified time.
Voltage Class
Input Voltage
Minimum Time
230V
0 - 160V
15 minutes
160 - 220V
15 minutes
220 - 260V
1 hour
480V
0 - 280V
15 minutes
280 - 400V
15 minutes
400 - 500V
1 hour
Storage Period: > 3 Years
Input voltage same as above, however double the amount of time for each
additional year. Eventually consider changing capacitors.
1.2.11. Storage of Unit
Содержание COMBIVERT F5
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