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'i' 'i' Ik_000.PPT - ispark ispark Explosionprotection made by PTB: Physikalisch-Technische Bundesanstalt Braunschweig und Berlin a method for computer aided assessment and design of intrinsically safe circuits with L o and C o

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'i'. Explosionprotection made by PTB:. ispark. a method for computer aided assessment and design of intrinsically safe circuits with L o and C o. -. Ik_000.PPT. Physikalisch-Technische Bundesanstalt Braunschweig und Berlin. 'i'. User target group. - PowerPoint PPT Presentation

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Ik_000.PPT

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isparisparkk

Explosionprotection made by PTB:

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin

a method for computer aided assessment and design of intrinsically safe circuits with Lo and Co

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User target group

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin104

Operators of sites requiring explosion protection

Manufacturers of explosion protected apparatus

Third party expertsTesting and certification bodies

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What does the method provide?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin

On the base of preset electrical source data, intrinsic safety of the source itself is checked and maximum permissible capacitances Co and inductances Lo are determined, specialities of cable reactances are picked up, granting some more headspace for site installations

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How does it work?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin

Systematic investigation of experimental ignition testing results, using the standardized spark test apparatus, yielded characteristic electrical and calorical parameters. A computer program uses these parameters for a model based calculation

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Competing methods

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin114

practical use of the standardized spark test apparatus

analytical evaluation against reference ignition data according to IEC 60079-11

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Disadvantages of practically using the standardized spark test apparatus

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin119

the standardized spark test apparatus itself, including appropriate infrastructure, is required

usage is prone to errors and often lengthy

experimental results are dependable only if statistically analysed, the standardized type test reveals no real significance

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Drawbacks using reference ignition data

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin121

reference ignition data are available only for some very simple sources and circuits

certain effects are not comprised by those data, for example non linearities and cables

usage is prone to error and often lengthy

reference ignition data often reveal quantita-tive contradictions

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Advantages using isparkispark

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin140

arbitrary electrical sources can be assessed

circuits comprising both, inductances AND capacitances as well as cables, are included

the application is simpliest to usereproducibility and coherence are very

high

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What kind of data must be preset?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin150

zone 0,1 resp. zone 2 (safety factor 1,5 resp. 1,0)

gasgrouptype of circuit including quantities for multiple sources parallel and/or serial

con-nection type of freewheeling if anyCable data: L‘, C‘ and R‘

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What kind of data are reported?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin160

summary of preset dataif the source is determined intrinsically

safe, a list of maximum Lo/Co pairs which are per-missible concurrently within the circuit

if inclusion of cables is claimed, additionally to Co/Lo pairs, a maximum cable length extra allowed

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What's needed to use isparkispark?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin180

personnel for type in electrical data and handle the reported results

a common standard PC running at least Win2000 (upto Win7_64)

the program package isparkispark itselfa license granted by PTB (royalty is €

2560.-, halved for acknowledged certification bodies)

Note: License includes all subsequent impro-vements/versions of isparkispark

without additional charge

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ispark‘s ispark‘s status today?

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin180

in PTB using isparkispark is the first choice when assessing circuits for certification

about one-third of European Notified Bodies have a license for ispark ispark

as well as one-third of IECEx participants

weaknesses of standardized experimental type testing nowadays are found more and more

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For further information please contact

Physikalisch-Technische Bundesanstalt Braunschweig und Berlin190

Martin Krämer, Dipl.-Ing., Ag 3.62Physikalisch-Technische

BundesanstaltBundesallee 10038116 Braunschweig,

DEUTSCHLANDtel: (+49) 0531/592-3525fax: (+49) 0531/592-3605email: [email protected]