Mounting and installation
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167225 / 8264605300
2015-02-03·BA00·III·en·04
Control and Distribution Panel in
flameproof enclosure
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Intrinsically safe circuits
Distance between the connecting parts for intrinsically safe and non-intrinsically safe cir-
cuits
• Provide a distance of 50 mm around the non-metallic insulating (1 mm) or earthed
metal (0.45 mm) separating plate between the connection points of intrinsically safe
and non-intrinsically safe circuits. The separating plates must have an appropriate
comparative tracking index (CTI) and must be reinforced in such a way that no
deformation can occur.
Terminal blocks in Ex e enclosure
Installation of additional components in the Ex d enclosure results in new
values for the power dissipation (see table "Power dissipation and
temperature class" in chapter "Technical data"). Extension of the Ex d
enclosure requires a repeated certification or evaluation by the manufacturer!
WARNING
Risk of electric shock (short circuit) due to incorrectly dimensioned or routed
cables and conductors!
Non-compliance can result in severe or fatal injuries.
• Use only insulated cables and conductors with a testing voltage of at
least 500 V AC and a minimum quality of H05.
• Make sure that the diameter of individual conductors and individual
finely stranded wires must not be smaller than 0.1 mm.
• Conductors and cables must be routed at a minimum distance of 8 mm
between Ex i and Ex e electric circuits. Exception: The cores are
protected by an earthed shield.
Observe the following when working on terminal blocks:
• Observe the test certificate of the terminals.
• Terminal bridging is only permitted if original Ex accessories are used.
• If necessary, retrofit required partitions.
• For additional splice protection, use core end sleeves or cable lugs.
• Make sure that the cross section of the splice protection matches the
conductor cross section.
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