GE Industrial Solutions Millennium II Controller J85501P-1 - Manual (Page 18)

Basic Installation and User’s Guide for the Millennium II Controller
Issue 3 January 2008 18
Precautions
When working on or using this type of equipment, the following precautions should be
noted:
• This unit must be installed, serviced, and operated only by 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 could 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.
• Hazardous energy and voltages are present in the unit and on the interface cables
that can shock or cause serious injury. Follow all safety warnings and practices
when servicing this equipment. When equipped with ringer modules, hazardous
voltages will be present on the ringer output connectors.
In addition to proper job training and safety procedures, the following are some basic
precautions that should always be used:
• 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.