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How does an Altivar Drive detect a [PHF] or input phase loss?

Published date: 09 November 2019

Issue:
How do Altivar and Altivar Process AC Drives detect input phase loss, or single phase supply, and trip on [PHF]

Product Line:
Altivar Process Drive

Environment:
ALLCause:Wiring / Programming

Resolution:
Per Level 3 in France;The detection is fully managed by the firmware.Basically the drive measures the 3 input phase, like we can see on the display menu, UL1,UL3,UL3 on the drive's display menu.The three measurements between phases has been compared to the DC bus voltage in order to extract a input phase ripple.Min/Max values of DC bus and allowable ripple:   Vdc_min(V)Vdc_max(V)Vripple_min(V)Vripple_max(V)M3 - 200V2253753270N4 - 400V 41575065140. The ripple detection has been improved to 27V 57V to 65V 140V since version V1.9IE15 of ATV930, V2.3IE25 of ATV630 and V1.5IE210 for ATV340, only for range's size 1 to size 6 (0.75Kw to 160kw), nothing on size 7 (220Kw to 315Kw).PHF detection time is now 500ms. PHF is now an auto rearm mode fault. PHF can still be disabled by PHL setting.
 

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