Induced EMF Distance

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ROHM

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I have a15KVA 480D/240, transformer being installed within 4 feet of a DCS (Distributed Control System) cabinet. Does anyone know if the transformer will cause any induced EMF into the circuits in the DCS cabinet?

What is acceptable distance in terms of installation from an AC transformer near a DC panel with circuits?
 
ROHM said:
I have a15KVA 480D/240, transformer being installed within 4 feet of a DCS (Distributed Control System) cabinet. Does anyone know if the transformer will cause any induced EMF into the circuits in the DCS cabinet?

What is acceptable distance in terms of installation from an AC transformer near a DC panel with circuits?
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I have often seen DCS and transformers mounted within 2' of each other and many are larger than 15kVA.

Are you using grounded steel enclosures?
 
This was a REAL issue in yesteryears since CRT monitors were extremely sensitive. Even an unbalanced switch loop and one light bulb would cause screen flitter. These days, aside from sensitive laboratory instruments and recording studios, I don't think it really matters as long as audible hum/buzz is kept in check.
 
Approx. 20 yrs ago we were called in to investigate jitter/flicker on various work station CRT screens due to EMF/EMI interference. The attached reports are presented for informational value only and do not specifically address the OPs question (forum monitors, pls go easy on me!) I converted the .doc files to .txt format to follow the rules so let me know if they open ok. Hope this helps in the investigation.
 

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