i' ik_000.ppt - ispark explosionprotection made by ptb: physikalisch-technische bundesanstalt...
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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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isparisparkk
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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isparisparkk
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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isparisparkk
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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isparisparkk
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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isparisparkk
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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isparisparkk
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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isparisparkk
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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isparisparkk
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]