Intrinsically safe barrier

[mcknight]

When voltage passes through an intrinsically safe barrier does the voltage change?

 

[itsmoked]

No other than it is specifically limited to a maximum. If the maximum is exceeded it will fault. It is also current limited.

Their entire point is to limit the delivered energy.

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[mcknight]

Thanks, I appreiciate the Information

 

[logbook]

A more complete answer would be that the barrier must limit the voltage at some value, but below that the barrier could reduce the voltage by resistive attenuation or indeed increase it by transformer action!

The key point is that it must not pass more than the defined "safe" level. Other than that the exact amount of gain/attenuation is not defined. (Ok, typically it would be a bit less than unity voltage gain.)

 

[ScottyUK]

If you have a poke around on MTL's website you will see how the basic principles used to design a barrier. They are usually pretty simple circuits and their behaviour is predictable.

http://www.mtl-inst.com/support/tp.htm

You will need to register but it is worthwhile.


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