GE Industrial Solutions 664 Infinity C DC to DC Power System - Manual (Page 13)

663 / 664E Installation Guide
CC848921016 r02 December 2012 Page 13
Precautions
Read and follow these precautions and those in equipment manuals.
• The equipment must be installed, serviced, and operated only by professional, skilled and qualified personnel
who have the necessary knowledge and practical experience with electrical equipment and who understand
the hazards that can arise when working on this type of equipment.
• The equipment may be powered by multiple AC inputs. Ensure that the appropriate circuit protection device for
each AC input being serviced is disconnected before servicing the equipment.
• Do not disconnect permanent bonding provisions unless all ac inputs are disconnected.
• Batteries may be connected in parallel with the output of the rectifiers. Turning off the rectifiers will not
necessarily remove power from the bus. Make sure the battery power is also disconnected and/or follow safety
procedures while working on any equipment that contains hazardous energy/voltage.
• High leakage currents may be possible on this type of equipment. Make sure the equipment is properly
safety earth grounded before connecting power.
• Exercise care and follow all safety warnings and practices when servicing this equipment. Hazardous energy
and voltages are present in the unit and on the interface cables that can shock or cause serious injury.
When equipped with ringer modules, hazardous voltages will be present on the ringer output connectors.
• Use the following precautions in addition to proper job training and safety procedures:
• Use only properly insulated tools.
• Remove all metallic objects (key chains, glasses, rings, watches, or other jewelry).
• Wear safety glasses. Fuses can produce sparks. High energy levels on buses and distribution components
can produce severe arcing.
• Test circuits before touching.
• Lock out and tag circuit breakers/fuses when possible to prevent accidental turn on.
• Be aware of potential hazards before servicing equipment.
• Identify exposed hazardous electrical potentials on connectors, wiring, etc. (note the condition of these
circuits, especially wiring).
• Use care when removing or replacing covers; avoid contacting circuits.
• Use a personal ESD strap when accessing or removing electronic components.
• Electricity produces magnetic fields that can affect implanted medical electronic devices, such as pacemakers.
The strength of the magnetic field depends on the amount of current in the circuit, as well as other conditions
(such as number of conductors, placement, and distance from the conductor). DC power and distribution
systems, including batteries, which are typically used in telecommunications utility rooms, can operate at high
current levels. Personnel with electronic medical devices need to be aware of their restrictions when working
around electricity.