Stahl 8150/1 Serie Mode D'emploi page 32

Mounting and Installation
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Distances, creepage distances and clearances
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 The creepage distances and clearances between the individual components, as well as
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The recommendation/scale are the values in standards ANSI/ISA/UL 60079-7 and
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60079-11; CSA C22.2 no. 60079-7.
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 Check the creepage distances of the components and comply with them according to the
specifications in the respective operating instructions.
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 Observe clearances.
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When doing so, use the rated operational voltage for the installed terminals as a guide.
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 Observe the distance between the cover and terminal screws of the built-in components
(with the conductor connected). It must be at least the value of the required clearances.
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Connecting intrinsically safe and non-intrinsically safe electrical circuits
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Distance provided by partitions
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 Partition must be at least 1.5 mm/0.06 inch from the enclosure wall and installed in
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accordance with all directions. Alternatively, maintain a distance of at least
50 mm/1.97 inch between the uncoated conductive parts of the connection terminals.
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 Make sure that metallic partitions
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• are at least 0.45 mm/0.02 inch thick
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• are earthed
• are sufficiently strong and rigid
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• have sufficient current carrying capacity.
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 Make sure that non-metallic, insulating partitions
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• are at least 0.9 mm/0.04 inch thick
• have an appropriate comparative tracking index (CTI)
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• are reinforced to prevent deformation
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 When using fuses > 4 A, implement additional design measures to prevent impermissible
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heat-up at the terminals of the intrinsically safe circuits.
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Distance provided by coverings
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 All live components that are not designed with "Ex i" type of protection must be provided
with an internal covering. For open equipment, these must correspond to at least IP30
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degree of protection.
Connecting intrinsically safe circuits
 Use only insulated cables and conductors with a test voltage of at least 500 V AC and
a minimum quality of H05.
Calculate the insulation test voltage as follows:
 Determine the rated operational voltages for intrinsically safe and non-intrinsically safe
circuits.
 Depending on the type of dissipation/insulation, select the following rated insulation
voltage value:
• "Intrinsically safe to earth": At least 500 V or double the value of the rated
operational voltage for intrinsically safe circuits.
• "Intrinsically safe to non-intrinsically safe": At least 1500 V or double the rated
operational voltage plus 1000 V.
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Terminal boxes
Series 8150/1, Series 8150/2
212727 / 815060300170
2021-02-25·IO00·III·en·02