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Participant

Join Date: May 2020
Posts: 2

Separate earthing

01/04/2022 12:49 PM

Separate earthing systems is a new recommeded for power to control as protectio?

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Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 30958
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#1

Re: Separate earthing

01/04/2022 2:36 PM

"Protection for installations that have been modernized or retrofitted presents a unique mix of problems that require a different perspective from a new installation.

The paper addresses lightning, transients, and radiation that cause problems on programmable logic controllers, distributed control systems, and remote electronic transducers.

While complex grounding grids and networks were not required for analog systems, newer digital equipment requires a very effective means of maintaining equal potential throughout the facility.

Methods of protecting circuits include a variety of sophisticated and not-so-elegant techniques. Special consideration must be given to the impact that towers have on a protection system.

The investigation ranges from no air terminals to lightning arrays. The protection problem is compounded when different soils such as clay and rock are encountered. Methods of calculating the grounding circuit resistance are identified.

Although the paper is based on a retrofit, the techniques are appropriate for any industrial installation using distributed control."...

https://www.semanticscholar.org/paper/Lightning%2C-Grounding-and-Protection-for-Control-Durham-Durham/cdd31684a54f6f278a4f896f424ae5e56e3e1658

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: Separate earthing

01/05/2022 5:15 AM

What is this question about:

  • British Standard 7671?
  • Instrument "clean" earth?
  • Something else?
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Anonymous Poster #1
#3
In reply to #2

Re: Separate earthing

01/05/2022 5:03 PM

Thanks friend, I would like more information from you experience as you effer to me in 2013 (isdray)

Thanks

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