ABB Ability 800xA Series User Manual page 115

C Linking Device for Zone 2 Explosion and Protection Environment
C.2 Commissioning and Installation
• The equipment must be protected against accidental opening. The follwoing warning
sign must be installed near the plugs:
Warning: Do not separate when energized!
• The connecting plugs must be secured using a torque of min. 0.3 Nm.
• If the parts of the plugs are loosened due to vibration during the operation, then the
plugs must be provided with a light firm varnish to secure the screws. An extraction
force of 0.5 Nm has to be achieved at an equivalent thread.
• Open or not securely closed sockets must not be energized in the Ex atmosphere.
• To circuits of Zone 2, only such equipment are connected that is suitable for operation
in this zone and is certified accordingly (Ex Certificate for the conductive equipment
documents have been provided).
• The devices must be protected from ultraviolet light exposure.
• The device must be connected at low inductance with the protective earth of the
system.
• Spare parts are ordered as complete units giving the material number stated on the
device (marking, type label).
• Do not put stress on the system by bending or torsion.
• Inside the potentially explosive atmospheres, assembly must be performed
considering the locally applicable rules of erection into account. The following
directions must be observed:
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2PAA114135-610
Assembly and maintenance must be done only if atmosphere is Ex-free and a
hot work permit is in place.
Additional precautions must be considered if the presence of hydro sulphide,
ethylene oxide and/or carbon monoxide is expected, those substances are of
a very low ignition energy.
Where these substances are present and any substance of explosion group
IIC is present, and yet a potentially explosive atmosphere is expected to be
present, only non-sparking tools must be used.
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