Precautions - ABB 827E Product Manual

Precautions

When working on or using this type of equipment, the following precautions must be noted:
• Install, service, and operate this equipment 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
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these circuits, especially wiring).
Use care when removing or replacing covers; avoid contacting circuits.
•
•
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.
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