ADC 70 - Manual (Page 4)

ADCP-80-524 • Issue 1 • November 2001
Page 4
©
2001, ADC Telecommunications, Inc.
General Safety Precautions
-
Important Product Features
Both
the traditional and uninterrupted fuse panel provide dc power over two separate buses
(feeds).
However, with the uninterrupted fuse panel, when one bus loses input power, the other
bus
supplies the output power for both buses.
Application:
Type 70 series fuse panels are used to supply protected dc power to the various
types
of telecommunications products typically used in central offices, multimedia headends,
remote
sites, and other locations.
Input
Power: Type 70 series fuse panels contain two buses (feeds) that accept –24 Vdc or –48
Vdc
input power. The traditional fuse panel is rated at 65 Amps input current per bus for a total
output
current of 130 Amps per fuse panel. The uninterrupted fuse panel is rated at 60 Amps
input
current per bus but the total output current cannot exceed 60 Amps per panel. During
back-up
operation, the uninterrupted can supply an output current of up to 30 Amps per bus or
one
half of the 60 Amps input current provided by the working power source.
Output
Power: Type 70 series fuse panels provide fuse protected output power with up to 8
fuse
positions per bus. The selectable current rating for each fuse can be standard amperage
capacity
type 70 fuses up to 10 Amps.
Type
70 series fuse panels incorporate several important features:
• Self-configuring
input voltage (–24 Vdc or –48 Vdc) capability with up to 65 Amps per
bus
(traditional fuse panel) and 60 Amps per bus (uninterrupted fuse panel) to simplify
installation
and allow their use in most dc voltage applications
• A
colored indicator that projects from the center of a blown type 70 fuse to quickly and
easily
identify the affected fuse position
• Alarm
contact connections built into the fuse panel for connection to external visual,
audio,
and remote alarms
• Field-replaceable
high-brilliance Power-On green and Alarm red LED indicators
• Easily-removable
smoked plastic protective cover over connectors to enhance safety and
panel
accessibility
• Two-post
grounding to ensure robust and reliable ground connectivity
Caution:
The fuse panel uses electrical voltage and amperage levels which, per GR-1089, may
be
considered an electrical hazard. Care should be exercised to assure that only qualified
personnel
are allowed to install, operate, maintain, or otherwise come in contact with this
equipment
when the panel is energized. Only insulated tools should be used on energized
elements
of the panel.
Caution:
All fuse panel wiring and cabling should be connected with the system office battery
input
off or disconnected at the office distribution panel.
Caution:
A replacement fuse must be the same type and must have exactly the same current
rating
as the fuse being replaced.