How do controllers and transducers react to varying voltage/frequency 2

[FerrariF]

Dear collegues,

I'm busy with a project on the respons of our systems to varying grid parameters: voltage and frequency.

There are a lot of controllers in action in the plant, and it would be usefull to know what the respons would be of the transducers and controllers (mostely analogue but also some digital) in degrading grid conditions.

Can anybody tell me what I can expect to happen if the voltage and or frequency changes (raises or drops)?

thanks!
greetings,
Frits

 

[itsmoked]

Virtually all sensors and transducers have voltage regulation in them as that is part of what gives them accuracy and robustness. So fluctuating voltage rarely causes any problems with them. If it is severe enough to affect them you have other problems. The frequency will likely not affect them at all as they rectify to DC the supply voltage anyway.

If you really must know specifically, you need to actually look at each one's manual and determine the max and min limits.

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[Skogsgurra]

The only transducer I know of that is affected directly by mains frequency is the old Pressductor (force transducer used in rolling mills). The modern ones are, as Keith says, not sensitive to voltage or frequency variations.

There may be situations where you have a ferroresonant stabilizer (constant voltage transformer) supplying a transducer or controller. Frequency variations affect them strongly. A few Hz takes them out of operation. Better remove them if frequency variations are your problem.

Gunnar Englund

http://www.gke.org

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