GB - 39
Annex
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
leastonthespeciedtime.
Voltage class Input voltage Residence time
400 V
0…280 V 15 min
280…400 V 15 min
400…500 V 1 h
Storage period > 3 years
• Input voltages as before, however double the times per year. Eventually change capac-
itors.
After expiration of this start-up the KEB COMBIVERT can be operated on nominal rating con-
ditions or delivered to a new storage.
A.5.1 Cooling circuit
The cooling circuit must be completely empty if a unit shall be switched off for a longer period.
The cooling circuit must be blown out additionally with compressed air at temperatures below
0°C.
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