P50 Agile P153 Chapter 2 - Safety Information
Warning:
Data communication cables with accessible screens and/or screen
conductors, (including optical fibre cables with metallic elements), may
create an electric shock hazard in a sub-station environment if both ends of
the cable screen are not connected to the same equipotential bonded
earthing system.
To reduce the risk of electric shock due to transferred potential hazards:
i. The installation shall include all necessary protection measures to ensure
that no fault currents can flow in the connected cable screen conductor.
ii. The connected cable shall have its screen conductor connected to the
protective conductor terminal (PCT) of the connected equipment at both
ends. This connection may be inherent in the connectors provided on the
equipment but, if there is any doubt, this must be confirmed by a continuity
test.
iii. The protective conductor terminal (PCT) of each piece of connected
equipment shall be connected directly to the same equipotential bonded
earthing system.
iv. If, for any reason, both ends of the cable screen are not connected to the
same equipotential bonded earth system, precautions must be taken to
ensure that such screen connections are made safe before work is done to,
or in proximity to, any such cables.
v. No equipment shall be connected to any download or maintenance
circuits or connectors of this product except temporarily and for
maintenance purposes only.
vi. Equipment temporarily connected to this product for maintenance
purposes shall be protectively earthed (if the temporary equipment is
required to be protectively earthed), directly to the same equipotential
bonded earthing system as the product.
3.8 UPGRADING/SERVICING
Warning:
Do not insert or withdraw modules, PCBs or expansion boards from the
equipment while energised, as this may result in damage to the equipment.
Hazardous live voltages would also be exposed, endangering personnel.
Caution:
Internal modules and assemblies can be heavy and may have sharp edges.
Take care when inserting or removing modules into or out of the IED.
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