What is the expected voltage when using ATV320 DC Bus to power up the drive?
Issue:
What is the normal DC Bus Voltage measurement when powering an ATV320 via the DC Bus instead of using single phase supply?
Product Line:
ATV320
Environment:
DC Bus
Cause:
Input Power Supply
Resolution:
On a 460v system, the normal bus voltage is around 650 V dc while it is running and 680 V dc before it is running.
For 230v drives that would be around 340v dc.
A DC voltage above 720 V may cause the drive to trip on overvoltage on power up.
760 V dc is above where the braking transistor would be pulsed, if it were used.
Although some people have powered these drives by dc, this voltage seems a bit high. Also, UL has not evaluated drives for being powered by the dc bus, so we cannot recommend this.
What is the normal DC Bus Voltage measurement when powering an ATV320 via the DC Bus instead of using single phase supply?
Product Line:
ATV320
Environment:
DC Bus
Cause:
Input Power Supply
Resolution:
On a 460v system, the normal bus voltage is around 650 V dc while it is running and 680 V dc before it is running.
For 230v drives that would be around 340v dc.
A DC voltage above 720 V may cause the drive to trip on overvoltage on power up.
760 V dc is above where the braking transistor would be pulsed, if it were used.
Although some people have powered these drives by dc, this voltage seems a bit high. Also, UL has not evaluated drives for being powered by the dc bus, so we cannot recommend this.