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Installation
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Insulation test voltage
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With regard to the insulation and separation of terminals and cables, it should be noted
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that the insulation test voltage is derived from the sum of the rated operating voltages
of intrinsically safe circuits.
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"Intrinsically safe against earth"
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In case of "intrinsically safe against earth" then the insulation voltage value is at least
500 V (or double the value of the intrinsically safe circuit rated operational voltage).
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"Intrinsically safe against non intrinsically safe"
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In case of "intrinsically safe against non-intrinsically safe", then the insulation voltage
value is at least 1500 V (double the sum of the rated operational voltage of
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intrinsically-safe circuits plus 1000 V).
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Terminal blocks in Ex e terminal compartment
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18
Ex d Enclosures made of Light
Metal, Flameproof Encapsulation
Danger due to incorrectly routed cables and wires!
Risk of short circuit.
Wires and cables must be at a minimum distance of 8 mm to wires and
cables of other intrinsically safe circuits.
Exception: The cores of intrinsically safe or non-intrinsically safe circuits
are protected by an earthed shield.
A distance of 50 mm around an insulating () 1 mm thick) or earthed metal
( ) 0.45 mm thick) isolating plate must be provided between the connection
points of intrinsically safe and non-intrinsically safe circuits.
An isolating plate at a distance of ( 1.5 mm to the enclosure wall must be
provided between the connection points of intrinsically safe and
non-intrinsically safe circuits.
Pay attention to the test certificate of the terminals.
Only one conductor may be connected to each terminal. Terminal bridging
is only permitted if original I.S. accessories have been used.
Equip with the necessary partitions as needed.
For additional protection against splaying use crimped wire-end sleeves
or cable lugs.
The cross section of the splay protection must meet the conductor
cross section.
WARNING
143457 / 826560300010
2016-03-10·BA00·III·en·09
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