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Testing for Intrinsic safety

Testing for Intrinsic safety

(OP)
When designing inductive circuits (solenoids) for use in intrinsically safe equipment, there are curves that specify maximum inductance as a function of applied voltage.  Does anyone have these in electronic format to eliminate the "guess work" involved when trying to interpolate voltage and current values?
Thanks,
podo

RE: Testing for Intrinsic safety

FM 3610 standard is free for download and contains the graphs you are looking for. Figures B-5 and B-6.

http://www.fmglobal.com/approvals/resources/standards.asp

right click and save as on 3610.

The graphs were originally printed in ‘‘Some Aspects of the Design of Intrinsically Safe Circuits,’’ Research Report 256, 1968, by D. W. Widginton, Safety in Mines Research Establishment, Sheffield, England.

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