ADCP-80-524 • Issue 1 • November 2001

General Safety Precautions

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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.

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

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© 2001, ADC Telecommunications, Inc.