Is it OK to put a disconnect between a VFD drive and the motor?
Issue:
Disconnect on the output of a drive?
Product Line:
All open style and enclosed Altivar drives.
Environment:
All models, all Serial numbers
Cause:
Information not available in existing literature.
Resolution:
A disconnect can be used between the drive and the motor. This is general practice to assure that power does not reach the motor during maintenance and other non-operating times.
Note that the disconnect should not be opened or closed while the VFD is running (outputting voltage from T1,T2,T3). This is sometimes referred to as "slamming the motor." This can damage the output IGBT components of the drive and such damage is not covered under warranty.
We recommend adding a fast-acting auxiliary contact on the disconnect that will trigger a freewheel stop on the drive before the main 3 phase contacts open.
Refer to your drive's Programming Manual for instructions on programming a logic/digital input as freewheel stop.
Disconnect on the output of a drive?
Product Line:
All open style and enclosed Altivar drives.
Environment:
All models, all Serial numbers
Cause:
Information not available in existing literature.
Resolution:
A disconnect can be used between the drive and the motor. This is general practice to assure that power does not reach the motor during maintenance and other non-operating times.
Note that the disconnect should not be opened or closed while the VFD is running (outputting voltage from T1,T2,T3). This is sometimes referred to as "slamming the motor." This can damage the output IGBT components of the drive and such damage is not covered under warranty.
We recommend adding a fast-acting auxiliary contact on the disconnect that will trigger a freewheel stop on the drive before the main 3 phase contacts open.
Refer to your drive's Programming Manual for instructions on programming a logic/digital input as freewheel stop.
Publikováno pro: Schneider Electric Česká republika
Potřebujete pomoc?
Nástroj pro výběr produktů
Rychle a snadno vyhledávejte správné produkty a příslušenství pro vaše aplikace.
Získejte nabídku
Poptejte se nás online a náš lokální specialista se s vámi spojí!
Kde nakoupit?
Jednoduše najděte nejbližšího distributora výrobků Schneider Electric ve vašem okolí.
Centrum nápovědy
Zdroje podpory pro všechny své potřeby najdete na jednom místě.