motor drives

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RETRAINDAILY

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We have a panle with 20 drives and 20 starters it has a isolatoin transformer
all drives have noise fillters built in, so is the isolation transformer redundent?


would there be better way protect for the drives then 20 line reactors?.

:confused:
 
RETRAINDAILY said:
We have a panle with 20 drives and 20 starters it has a isolatoin transformer
all drives have noise fillters built in, so is the isolation transformer redundent?


would there be better way protect for the drives then 20 line reactors?.

:confused:
Click to expand...
Depends on what you mean by "noise filters". That could mean a number of things.
 
RETRAINDAILY said:
We have a panle with 20 drives and 20 starters it has a isolatoin transformer
all drives have noise fillters built in, so is the isolation transformer redundent?


would there be better way protect for the drives then 20 line reactors?.

:confused:
Click to expand...
FWIW I've been in the drives business for a very long time and we never use isolation transformers. That is transformers whose sole function is isolation.
 
Older style drives such as machine coordinated DC drive systems typically had some type of isolation transformers installed. I've even installed drive systems with a combination of delta-wye and delta-delta transformers off a single bus to help cancel some of the harmonics.

The newer PWM drives produce very little harmonic distortion on the line side of the drive and I haven't put in an isolation transformer in years and haven't seen any negative effects. So yes, it probably is redundant.

TxEngr
 
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