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ADCP-80-575 • Issue 2 • December 2006
Page 1
© 2006, ADC Telecommunications, Inc.
1 PRODUCT DESCRIPTION
This section describes the PowerWorx Select Series Fuse Platform.
1.1 Product Functions and Features
The Select Series Fuse Platform, shown on the front cover of this manual, supplies protected dc
power to the –24 Vdc or –48 Vdc equipment typically installed in a central office, multimedia
headend, remote site, Controlled Environmental Vault (CEV), or other restricted locations. The
fuse platform is available in a single or dual bus configuration and in several configurations of
fuse types. The fuse platform provides the following important features:
• 19-inch or 23-inch EIA or WECO rack mounting.
• Self-configuring input voltage capability to –24 Vdc or –48 Vdc.
• GMT, KLM, or TPA fuse types alone (with corresponding fuse holder modules), or GMT
in combination with either of the other two types.
• “Upside down” GMT fuse holders making blown fuses easier to see.
• Optimally-positioned, high-brilliance fuse alarm (red LED) indicators, providing quick
identification of blown fuses.
• Field-replaceable high-brilliance power-on (green LED) indicators (one per bus).
• Easy-to-remove plastic protective covers for input and output terminals.
• Two-hole compression-lug terminals for input power connections.
• Two grounding studs for robust and reliable ground connectivity.
• Screw-down barrier terminal strips for power output connections.
• Relay contacts for alarms (corresponding to red LEDs above). The alarm contacts may be
used to open or close a loop connected from an external alarm system.
1.2 Fuse Platform Components
The Select Series Fuse Platform, shown in Figure 1, is a customer-configurable product
containing either one or two power buses. Each power bus is connected to multiple fuse holder
modules. In a dual bus platform, the two buses are mirror images of one another, having the
same types of fuses and the same size fuse holder modules.
Note: KTK fuses will also fit in the KLM fuse holder, but are not currently rated for dc
voltages by Underwriters Laboratories (UL).
Note: For KLM fuses, there is a two-color (green/red) LED for each fuse position. A
green LED indicates a good fuse. A red LED indicates a failed fuse or a removed fuse. A
method is available to disable the LED (no green or red light) when a fuse holder is left
empty on purpose (see Section 6.1 on Page 28).