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IEVref:426-28-01ID:
Language:enStatus: Standard
Term: effective ignition source
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Definition: potential ignition source that is able to ignite an explosive atmosphere when consideration is taken of when it occurs (i.e. in normal operation, expected malfunction or rare malfunction)

Note 1 to entry: This is important for establishing the EPL.

Note 2 to entry: An effective ignition source is a potential ignition source which can ignite the explosive atmosphere if protective measures are not used.

Note 3 to entry: For example, the frictional heat that can be produced by a bearing is a possible ignition source. This is an equipment-related ignition source if the piece of equipment contains a bearing. If the energy that can be produced by the friction in the bearing is capable of igniting an explosive atmosphere, then this is a potential ignition source. Whether this potential ignition source is effective depends on the likelihood that it will occur in a particular situation.


Publication date:2020-03
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