NetSure
™
-48V DC Power System
User Instructions, UM582127000 (Issue AD, January 20, 2014)
Spec. No: 582127000
Code: UM582127000
Model No: 721
NPBB
Issue AD, January 20, 2014
[iii]
Important Safety Instructions
General Safety
DANGER!
YOU MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures may expose you to
hazards. These procedures should be performed by
qualified technicians familiar with the hazards
associated with this type of equipment. These hazards
may include shock, energy, and/or burns. To avoid
these hazards:
a) The tasks should be performed in the order
indicated.
b) Remove watches, rings, and other metal objects.
c) Prior to contacting any uninsulated surface or
termination, use a voltmeter to verify that no
voltage or the expected voltage is present. Check
for voltage with both AC and DC voltmeters prior to
making contact.
d) Wear eye protection.
e) Use double insulated tools appropriately rated for
the work to be performed.
f) For 400V DC input systems, do not work on an
energized system without full arc flash and PPE
protection.
Voltages
AC Input Voltages
DANGER!
This system may operate from AC input
voltage capable of producing fatal electrical shock. AC
input power must be completely disconnected from the
branch circuits wiring used to provide power to the
system before any AC electrical connections are made.
Follow local lockout/tagout procedures to ensure
upstream branch circuit breakers remain de-energized
during installation. DO NOT apply AC input power to
the system until all electrical connections have been
completed and checked.
DC Input Voltages
DANGER!
This system may operate from 400V DC input
voltage capable of producing fatal electrical shock. DC
input power must be completely disconnected from the
branch circuits wiring used to provide power to the
system before any DC electrical connections are made.
Follow local lockout/tagout procedures to ensure
upstream branch circuit breakers remain de-energized
during installation. DO NOT apply DC input power to
the system until all electrical connections have been
completed and checked.
DC Output and Battery Voltages
DANGER!
This system produces DC Power and may have
a battery source connected to it. Although the DC
voltage is not hazardously high, the rectifiers/converters
and/or battery can deliver large amounts of current.
Exercise extreme caution not to inadvertently contact or
have any tool inadvertently contact an output terminal
or battery terminal or exposed wire connected to an
output terminal or battery terminal. NEVER allow a
metal object, such as a tool, to contact more than one
termination or battery terminal at a time, or to
simultaneously contact a termination or battery
terminal and a grounded object. Even a momentary
short circuit can cause sparking, explosion, and injury.
DANGER!
Follow local lockout/tagout procedures to
ensure DC branch circuit protection devices remain de-
energized during installation at loads, as required.
Battery
WARNING!
Correct polarity must be observed when
connecting battery leads.
WARNING!
Special safety precautions are required for
procedures involving handling, installing, and servicing
batteries. Observe all battery safety precautions in this
manual and in the battery instruction manual. These
precautions should be followed implicitly at all times.
Danger
Danger
Warning
Warning
Danger
Danger
Danger
