{}

브랜드

Impact-Company-Logo-English Black-01-177x54

슈나이더 일렉트릭 코리아 웹사이트에 방문해 주셔서 감사합니다.

슈나이더 일렉트릭 코리아 웹사이트 방문자 분들 모두 환영합니다.
FAQ 검색
What is USF (under voltage fault) on an ATV630 process drive?
Issue:
USF fault on an ATV630 process drive

Product Line:
Altivar 630, Process

Environment:
All

Cause:
N/A

Resolution:
The USF fault occurs when the DC bus voltage level drops below the threshold set in Complete settings, Error/Warning handling, Undervoltage handling.
In this submenu, you can change the value of what is considered undervoltage level, the timeout for the fault to appear, along with response to the fault.

Recommendations:
- Measure the the incoming line to line voltages
- Compare the line voltage to the Mains Voltage as shown under Display menu, Drive parameters, and also the measurement of the DC bus voltage.
- If the standard line voltage is low, you can adjust the Mains voltage setting
- Adjust the Undervoltage time out to compensate for line contactors, or add time delay before a fault would occur.

The DC bus of the drive can also be measured on terminals PA and PC.  This requires a true RMS cat 3 meter minimum.
Check for flat topping issues.  Check the load for high current draw.

슈나이더 일렉트릭 Korea

자세히 알아보기
제품군
유용한 문서
자세히 알아보기
제품군