ADCP-80-526
Issue 6
December 2006
PowerWorx® Power Distribution Products
Select Series™ Fuse Platform
User Manual
18858-A
1354430 Rev B
ADCP-80-526 • Issue 6 • December 2006 • Preface
TABLE OF CONTENTS
Content
Page
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Standards Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Admonishments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
General Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Product Functions and Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Fuse Platform Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Product Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Packaged Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.6 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.7 Power Buses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Bus Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.9 Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.10 Input Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.11 Output Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.12 Ground Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.13 Alarm Contact Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.14 Alarm Contact Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.15 Fuse Alarm Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.16 Power-On Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.17 Fused Equipment Designation Card and Holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.18 Voltage Designation Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1.19 Environmental Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.20 Material and Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.21 Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.22 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.23 Protective Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.24 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
UNPACKING AND INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PRE-INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 General Installation Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Installation Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Materials Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Continuity Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Installing Cable Management Bar (Optional Item) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Mounting Fuse Platform on Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3 Grounding Chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Connecting Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.5 Connecting Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006 • Preface
TABLE OF CONTENTS
Content
Page
4.6 Connecting Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7 Installing Protective Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.8 Installing GMT Fuse Designation Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.9 Installing Fuse Designation Card Holder and Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.10 Installing Voltage Designation Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.11 Installing Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SYSTEM CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 Wiring Connections Torque Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2 Power Indication Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.3 Connection Polarity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.4 GMT, TPA Fuse Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.5 KLM Fuse Alarm Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1 Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.3 Fuse Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CUSTOMER INFORMATION AND ASSISTANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006 • Preface
ABOUT THIS MANUAL
This manual describes the PowerWorx® Select Series™ Fuse Platform and provides
installation, operation, maintenance, and testing procedures. The Select Series™ Fuse Platform
is available with various types of fuses including TPA, KLM, and GMT fuses. Two types of
fuses can be combined within the same platform, if required. Within this manual, the Select
Series™ Fuse Platform is referred to as the “Select Series™ fuse platform” or the “fuse
platform”.
STANDARDS CERTIFICATION
The fuse platform complies with the applicable sections of the following standards: UL,
Telcordia, NEC 1999, CE, IEC, CSA, and NEBS Level 3.
ADMONISHMENTS
Important safety admonishments are used throughout this manual to warn of possible hazards to
persons or equipment. An admonishment identifies a possible hazard and then explains what
may happen if the hazard is not avoided. The admonishments — in the form of Dangers,
Warnings, and Cautions — must be followed at all times. These warnings are flagged by use of
the triangular alert icon (seen below), and are listed in descending order of severity of injury or
damage and likelihood of occurrence.
Danger: Danger is used to indicate the presence of a hazard that will cause severe personal
injury, death, or substantial property damage if the hazard is not avoided.
Warning: Warning is used to indicate the presence of a hazard that can cause severe personal
injury, death, or substantial property damage if the hazard is not avoided.
Caution: Caution is used to indicate the presence of a hazard that will or can cause minor
personal injury or property damage if the hazard is not avoided.
GENERAL SAFETY PRECAUTIONS
-
Warning: The fuse platform uses electrical voltage and current levels that 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 into contact with this equipment when
the fuse platform is energized. Only insulated tools should be used on energized elements of the
fuse platform.
Caution: All fuse platform 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 of the same type and current rating as the fuse being
replaced.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006 • Preface
Warning: Wet conditions increase the potential for receiving an electrical shock when
installing or using electrically-powered equipment. To prevent electrical shock, never install or
use electrical equipment in a wet location or during a lightning storm.
Page vi
© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
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 (with corresponding fuse holder modules) alone, or GMT
in combination with either of the other two types.
Note: KTK fuses will also fit in the KLM fuse holder, but are not currently rated for dc
voltages by Underwriters Laboratories (UL).
• “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 alarm notification. 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 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
(in this case, a dual bus fuse platform with four KLM and four GMT fuses per bus).
Warning: Use of one bus only on a dual bus panel will result in false alarms for the unused bus.
Power is required on both buses on a dual bus panel for normal operation.
Warning: In a fuse platform with KLM fuses, the KLM-fused output terminals will show –48
Vdc even when there is no load and no fuse in the fuse holder. This “phantom voltage” is
applied by the KLM circuitry alarm sensing function and will be less than 1 Amp.
Page 1
© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
UL/CSA/CE
LABEL
BUS A POWER ON
INDICATOR
(GREEN LED)
BUS B POWER ON
INDICATOR
(GREEN LED)
BUS A
BUS A KLM/KTK
FUSE HOLDERS
KLM/KTK
FUSE ALARM
INDICATOR
(RED LED)
(TYPICAL)
BUS A GMT
FUSE ALARM
INDICATOR
BUS B GMT
FUSE ALARM
INDICATOR
(RED LED)
(RED LED)
BUS B
KLM/KTK
FUSE ALARM
INDICATOR
(RED LED)
(TYPICAL)
BUS A GMT
FUSE HOLDER
(4 POSITION)
BUS B GMT
FUSE HOLDER
(4 POSITION)
BUS B KLM/KTK
FUSE HOLDER
FRONT VIEW
DESIGNATION CARD
AND CARD HOLDER
CHASSIS
GROUND
STUDS
BUS B
POWER INPUT
TERMINALS
BUS B
MOUNTING
BRACKETS (2),
INSTALLED FOR 19-IN.
(48.26 CM) RACK
MOUNTING
GMT FUSED
POWER OUTPUT
TERMINALS
BUS B
BUS A
KLM/KTK FUSED
POWER OUTPUT
TERMINALS
GMT FUSED
POWER OUTPUT
TERMINALS
ALARM
TERMINALS
BUS A
POWER INPUT
TERMINALS
BUS A
KLM/KTK FUSED
POWER OUTPUT
TERMINALS
COVERS FOR
INPUT POWER
TERMINALS
REAR VIEW
18877-A
PROTECTIVE
COVER
Figure 1. Dual Bus KLM-GMT Fuse Platform
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
Warning: If a KLM fuse holder without a fuse is connected to a load, an alarm is reported
(alarm red LED lights and alarm contacts change states, as in a fuse failure).
Depending on customer order, the fuse platform may have one fuse type alone, or GMT fuses in
combination with one other fuse type (KLM or TPA). The number of fuse positions on each bus
is dependent on the maximum current limit, as well as on the current value of the fuses and the
width of the fuse holders. The maximum current input per bus is 100 Amps.
1.3 Product Options
Product options including the following:
• Two, four, or six TPA fuses with four or ten GMT fuses
• Two or four KLM or KTK fuses with four or ten GMT fuses
• Any of the above fuse types alone including:
– Two, four, or six TPA fuses per bus
– Two or four KLM or KTK fuses per bus
– Ten GMT fuses per bus
output cannot exceed 100 Amps per bus (200 Amps per dual bus platform).
Note: The continuous output load of the equipment during normal operation should not
exceed 80% of the rated value of the fuse. This allows some room for manufacturing
tolerances and voltage fluctuations in the plant power mains.
Two types of alarm contacts are available: wire wrap or screw-down barrier terminal strip.
Two fuse platform mounting options are available: EIA/WECO or ETSI. (All fuse platforms can
be installed in either a 19-inch or 23-inch rack. The fuse platform comes with mounting
brackets for both rack widths.)
1.4 Packaged Hardware
separately and enclosed in the same carton. The packaged hardware components include the
following items:
• Two sets of mounting brackets (for 19-inch or 23-inch rack mounting)—Used to mount
the panel on the equipment rack.
• 5/16-inch long, Phillips drive, 8-32 flat-head thread-forming screws (8)—Used to secure
the mounting brackets to the panel.
• 3/8-inch long, combination drive, 12-24 pan-head screws (4) and #12 flat washers (4)—
Used to secure the mounting brackets to the equipment rack.
• #10 ring terminals (2) for 12–10 AWG wire—Used to connect the grounding cables to the
grounding studs.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
• Rear protective input terminal covers and output terminal covers—Used to prevent
accidental contact with the power input and output terminals. The number of covers
provided depends on the fuse configuration.
• Designation card and card holder—Used to record information about the protected
equipment. The card holder has a pressure-sensitive adhesive backing to permit
attachment to the panel, the rack, or a location close to the panel. The designation card
inserts into the card holder. It is also available as an accessory item.
REAR COVER FOR OUTPUT POWER TERMINAL BLOCKS,
ALARM TERMINALS, AND CHASSIS GROUND TERMINALS
REAR COVERS FOR INPUT
POWER TERMINAL BLOCKS
#10 RING TERMINALS FOR
12-10 AWG WIRE (GROUNDING)
5/16-INCH (7.936 MM) 8-32
FLAT-HEAD SCREWS
19-INCH
RACK MOUNTING
BRACKETS
3/8-INCH (9.525 MM) 12-24
SCREWS AND #12 WASHERS
DESIGNATION CARD,
PROTECTIVE COVER,
AND CARD HOLDER
23-INCH
RACK MOUNTING
BRACKETS
MOUNTING BRACKETS
AND SCREWS FOR 19-INCH OR
23-INCH RACK INSTALLATION
18876-A
Figure 2. Packaged Hardware Components
Page 4
© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
1.5 Accessories
The following accessories are available for the fuse platform:
• Standard size GMT, KLM, and TPA type fuses
• GMT colored fuse-value designation pins (rivets)
• Cable management bar kits
• GMT fuse pullers
• Two-hole compression connector lugs for input power connections
• Lug terminals to connect #10 AWG wire to earth ground
• GMT fuse value designation pin holders
• Fuse value designation card holder kits
1.6 Mounting
The fuse platform can be mounted in a 19-inch (48.26 cm) or a 23-inch (58.42 cm) equipment
rack. Two pairs of mounting brackets, one pair for 19-inch racks and one pair for 23-inch racks,
are provided with the fuse platform. The fuse platform can be flush mounted or recessed 1, 2, 3,
or 4 inches (2.54, 5.08, 7.62 or 10.16 cm) from the front of the rack. The mounting brackets
allow mounting in racks with WECO 1.00-inch (2.54 cm) hole spacing or EIA 1.25-inch (3.18
cm) hole spacing. The slotted hole pattern in the mounting brackets compensates for vertical
rack differences and allows the fuse platform to be mounted in either 1.75- or 2-inch (4.45 or
5.08 cm) rack spaces.
1.7 Power Buses
The fuse platform is available with one or two separate power buses. Each bus distributes the
input power to multiple fused output circuits. In each bus circuit, current flows from the input
connector to the fuse bus. When a fuse is installed in a fuse holder, the circuit is completed to
fuse platform.
Fuse failure is sensed by a sensor which causes the alarm monitor to light a red LED indicator
on the front of the fuse holder. For KLM, KTK, and TPA fuses, there is an individual red LED
indicator for each individual fuse because each fuse holder holds a single fuse. For GMT fuses,
there is a red LED indicator for each set of fuses (depending on product configuration, each fuse
holder holds four or ten fuses). Fuse failure also opens and closes a set of alarm contacts (form
C dry contacts) connected to the alarm output terminals. There is one such set of alarm contacts
for each bus, with failure of any fuse on the bus causing an alarm condition.
If a fuse holder without a fuse is connected to a load, the result differs depending on fuse type.
For a KLM and KTK fuses, this situation causes the red LED to light and the alarm contacts to
change states, same as would occur in a fuse failure. A KLM or KTK fuse holder without a fuse
installed should, therefore, not be connected to a load since this situation could be
misinterpreted as a failed fuse.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
For other types of fuses (TPA and GMT), if a fuse holder without a fuse is connected to a load,
the corresponding sensor remains inactive and no failure is indicated.
The maximum current capacity of each power bus circuit is 100 Amps. The total output current
capacity of the fuses on each bus must, therefore, not exceed 100 Amps. The maximum current
rating is marked on the fuse platform rear side. The power dissipation of the panel is 80 watts
maximum per fuse platform (40 watts per bus at 100 Amps).
Note: The continuous output load of the equipment during normal operation should not
exceed 80% of the rated value of the fuse. This allows some room for manufacturing
tolerances and voltage fluctuations in the plant power mains.
KLM
GMT
BATT
RTN
BATT
RTN
1
2
1
2
BATT
RTN
3
3
4
4
RED
RED
KLM
GMT
GREEN
GREEN
POWER A
ALARM
MONITOR
NO C NC
ALARM
AUDIO
VISUAL
REMOTE
POWER B
ALARM
MONITOR
RED
RED
KLM
GMT
BATT
RTN
BATT
RTN
1
2
1
2
RTN
3
3
BATT
4
4
20827-A
Figure 3. Block Diagram of Typical Fuse Platform Power Buses
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
1.8 Bus Capacity
The current capacity of each power bus is 100 Amps maximum, which is marked above the
input connectors on the rear of the fuse platform. The total current of a fuse platform with two
buses is 200 Amps maximum. The power dissipation of the fuse platform is 80 watts maximum
per fuse platform (40 watts per bus at 100 Amps)
The following lists the maximum current that each type of fuse can provide:
• TPA type fuse (each fuse in two, four, or six position module): 50 Amps max.
• KLM type fuse (each fuse in two or four position modules): 30 Amps max.
• GMT type fuse (each fuse in four position module): 15 Amps max.
• GMT type fuse (each fuse in 10 position modules): 10 Amps max.
1.9 Input Voltage
The fuse platform can accommodate –24 Vdc input power on both busses or –48 Vdc input
power on both busses. The voltage is sensed by the fuse platform circuitry.
The input voltage used with the fuse platform is required to have the following voltage
characteristics:
• –24 Vdc nominal, within a range of –21 Vdc to –30 Vdc
• –48 Vdc nominal, within a range of –42 Vdc to –56 Vdc
Fuse panels for use with other input voltage values and polarity may be available by special
order.
1.10 Input Power Connectors
Input power to the power bus is supplied through an input power terminal block located on the
rear side of the fuse platform. Dual bus fuse platforms have a separate input terminal block for
each bus. If two buses are present, the terminal blocks are designated A and B, corresponding to
the two power buses.
Each input terminal block includes two pairs of 0.25-inch studs that are used for connecting the
BATT (battery –) and RTN (return +) input power cables. Each pair of studs is mounted on
0.625 inch centers and accepts various size 2-hole compression lugs. The maximum lug width is
0.62 inches.
Compression lugs for various sizes AWG wire are available as accessory items. Nuts with
captive washers are included to secure the compression lugs to the studs. The input terminal
blocks are located on the rear side of the panel.
The minimum recommended wire size for the input power wiring is #2 AWG copper wire. In
selecting wire size, follow local code referring to the ampacity guidelines provided in Appendix
A of this manual.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
1.11 Output Power Connectors
Depending on the fuse configuration used, the fuse platform will have at least one, and up to
four, output power terminal blocks, located on the rear side of the platform. The number present
will depend on the fuse type and number of fuse positions. In general, there will be one terminal
block per bus for each fuse type present on that bus.
All of the output power terminal blocks are screw-down barrier terminal strips. The terminal
screws are of various sizes corresponding to the current load of the fuses. Each individual output
has two terminals, battery (BATT) and return (RTN).
Copper wire is used for output power wiring. Connections are typically made using ring or
maximum terminal width, and accepted wire gauge. In selecting wire size, follow local code
referring to the ampacity guidelines provided in Appendix A of this manual.
Warning: In a fuse platform with KLM fuses, the KLM-fused output terminals will show –48
Vdc even when there is no load and no fuse in the fuse holder. This “phantom voltage” is
applied by the KLM circuitry alarm sensing function and will be less than 1 Amp.
Table 1. Output Power Terminal Blocks
LUG/AWG
FUSE
TYPE
FUSE HOLDER
MODULE
TERMINAL
MAXIMUM
RANGE *
SCREW SIZE TERMINAL WIDTH
KLM
All sizes
8-32
8-32
6-32
6-32
8-32
3-48
0.320 inch (8.128 mm) #10 to #22
0.320 inch (8.128 mm) #10 to #22
0.325 inch (8.255 mm) #12 to #22
0.260 inch (6.604 mm) #14 to #22
0.320 inch (8.128 mm) #10 to #22
0.200 inch (5.080 mm) #16 to #24
TPA
All sizes
GMT
4- or 5-position
10-position
GMT
TPA/GMT
4 TPA fuses with
10 GMT fuses
* Output terminal accepts wire sizes in the AWG range given; however, wire
size should be determined based on local requirements and practice.
1.12 Ground Connectors
Two #10 studs (with nuts) are provided for grounding the fuse platform chassis. The studs are
mounted on 0.625 inch (15.875 mm) centers.
Two crimp ring lug terminals for two #10 AWG wires are provided with each fuse platform. The
fuse platform may be grounded using only one stud.
1.13 Alarm Contact Operation
The fuse platform contains circuitry that opens and closes a set of alarm contacts when any fuse
on the bus fails or when input power to the bus is lost. These contacts may be used to open or
close a loop connected to an external alarm system.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
The alarm circuitry uses form C alarm relay dry contacts. During normal operation (power
applied and all fuses operational), the normally open (NO) contacts remain open and the
normally closed (NC) contacts remain closed. When a fuse fails on either bus or power to either
is lost, the NO contacts close creating a connection from NO and common and the normally
closed (NC) contacts open creating an open circuit between NC and common. The current
rating for each set of alarm relay contacts (either two or three sets of contacts are provided) is
110 Vdc/125 Vac maximum voltage, 1.0 Amp maximum switching current.
Note: If a KLM or KTM fuse holder without a fuse is connected to a load, this situation
causes the red LED to light and the alarm contacts to change states, same as would occur
in a fuse failure. For other types of fuses (TPA and GMT), if a fuse holder without a fuse is
connected to a load, the corresponding sensor remains inactive and no failure is indicated.
Warning: In a fuse platform with KLM fuses, the KLM-fused output terminals will show –48
Vdc even when there is no load and no fuse in the fuse holder. This “phantom voltage” is
applied by the KLM circuitry alarm sensing function and will be less than 1 Amp.
1.14 Alarm Contact Connectors
The fuse platform is available with either screw-down barrier terminal strips or wire wrap pins
for the alarm contact connections. The following describes both types of contact connections:
Warning: Use of one bus only on a dual bus panel will result in false alarms for the unused bus.
Power is required on both buses on a dual bus panel for normal operation.
• Screw-down barrier terminal strip: Six terminals with 3-48 screws are mounted in a barrier
type terminal block. The terminals are on 0.25 inch (6.35 mm) centers with a maximum
distance between barriers (maximum connecting terminal width) of 0.20 inch (5.08 mm).
The alarm terminal strip has two sets of three terminals (NO, C, and NC) for use with two
alarm systems. The terminals can accept #16 to #30 AWG copper wire with insulation
stripped back. In selecting wire size, follow local code referring to the ampacity guidelines
provided in Appendix A of this manual.
• Wire-wrap terminal block: Nine wire-wrap pins are mounted in a terminal block for both
buses. The alarm terminal block has three sets of three wire-wrap pins (NO, C, NC), for
use with three alarm systems. The wire-wrap pins can accept #22 to #26 AWG copper wire
with insulation stripped back. In selecting wire size, follow local code referring to the
ampacity guidelines provided in Appendix A of this manual.
1.15 Fuse Alarm Indicators
A visual fuse alarm indicator (red LED) is provided on the front of each fuse holder module.
The fuse alarm indicator lights when any fuse in the corresponding fuse holder fails. The fuse
alarm indicator is off when all fuses in the fuse holder module are operational. Loss of power to
a bus will not cause the fuse alarm indicators corresponding to that bus to be lighted. For TPA
and KLM fuses, there is one fuse holder per fuse and, therefore, a fuse alarm indicator for each
fuse. For GMT fuses, there are four or ten fuses per fuse holder with a single fuse alarm
indicator for the entire set of fuses.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
Note: If a KLM or KTM fuse holder without a fuse is connected to a load, this situation
causes the red LED to light and the alarm contacts to change states, same as would occur
in a fuse failure. For other types of fuses (TPA and GMT), if a fuse holder without a fuse is
connected to a load, the corresponding sensor remains inactive and no failure is indicated.
1.16 Power-On Indicator
An optional visual power-on indicator (green LED) for each power bus is mounted near the
center of fuse platform front panel. If present, the LED, when lighted, indicates that power is
being applied to the bus input connectors. An unlighted LED indicates that power is not being
applied. The power-on indicator LED can be replaced in the field.
1.17 Fused Equipment Designation Card and Holder
provided with the fuse platform. The card holder may be attached to either the fuse platform, the
fuse platform mounting brackets, the rack, or a suitable surface close to the fuse platform. One
of the cards may be filled out with circuit information for each of the circuits and inserted in the
card holder. The card holder has a pressure-sensitive adhesive backing for attachment.
Additional fused equipment designation cards, card holders, and plastic covers can be ordered
separately if required.
1.60 IN.
(4.06 CM)
2.36 IN.
(5.99 CM)
18866-A
Figure 4. Fuse Designation Cards
1.18 Voltage Designation Label
may be filled out with the actual voltage present on the buses and placed on the fuse platform.
The voltage designation label has a pressure sensitive adhesive backing for attachment.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
0.38 IN.
(0.96 CM)
14228-A
1.00 IN.
(2.54 CM)
Figure 5. Voltage Designation Label
1.19 Environmental Characteristics
Table 2 lists the environmental characteristics of the fuse platform.
Table 2. Fuse Platform Environmental Characteristics
DESCRIPTION
PARAMETER
Operating temperature
Storage temperature
Humidity range (operating)
Altitude range
–5° C to +50° C
–45° C to +85° C
0% to 95% humidity (non-condensing)
–197 ft. (0.06 km) to 13,000 ft. (3.96 km) above sea level
All components UL94-V1
NEBS Level 3; Zone 4
Fire rating
Earthquake design
Acoustic noise
0 dBA above ambient
Heat dissipation (fully loaded)
80 watts maximum per fuse platform @ 100 Amps (40
watts maximum per bus @ 100 Amps)
Heat dissipation (no load)
1 watt per bus
1.20 Material and Finish
The fuse platform chassis and brackets are made of 16 gauge cold rolled steel. The fuse
platform and brackets are finished with powder paint that is putty white color.
1.21 Weight
The weight of the fuse platform is approximately 12.5 pounds (5.675 kilograms).
1.22 Cooling
Vent openings are provided in the top and bottom of the fuse platform. The vent openings allow
convection cooling of all components without the use of fans or blowers. A minimum of 1.75
inches (4.45 cm) of air space (one rack space) must be provided above and below the fuse
platform to allow air to circulate freely.
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
1.23 Protective Cover
A smoked plastic protective cover is mounted over the input power connectors, the output
power connectors, the chassis ground terminals, and the external alarm contact connections. To
access the connectors and terminals, loosen (do not remove) the four screws.
1.24 Dimensions
Figure 6 shows the dimensions of the fuse platform.
17.13 IN.
(43.51 CM)
11.1 IN.
(28.2 CM)
10.00 IN.
(25.41 CM)
1.75 IN.
(4.44 CM)
23.00 IN.
(58.42 CM)
22.31 IN.
(56.67 CM)
1.13 IN.
(2.87 CM)
18862-A
Figure 6. Dimensions of Select Series Fuse Platform
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
2 UNPACKING AND INSPECTION
Before starting the installation, always open the shipping boxes and verify that all parts have
been received and that no shipping damage has occurred. Use the following procedure to
unpack and inspect the fuse platform:
1. Open the shipping carton and carefully unpack the fuse platform from the protective
packaging.
2. Check the panel for broken or missing parts. If there are any damages, contact ADC (see
Section 8, Customer Information and Assistance on page 29 for an RMA (Return Material
Authorization) and to reorder if replacement is required.
3 PRE-INSTALLATION
This section contains general installation recommendations, unpacking and inspection
procedures, a list of tools and materials required, and continuity test procedures.
3.1 General Installation Recommendations
The fuse platform should be installed in a central office, equipment room, or restricted access
location. Observe the following guidelines when installing the fuse platform:
• Mount the fuse platform in the upper area of the rack or cabinet to reduce exposure of the
power wiring. Provide a minimum of 1.75 inches (4.45 cm) of air space (one rack space)
above and below the fuse platform to allow air to freely circulate.
• Be aware that adding a fuse platform to the rack may displace a device which may require
relocation.
power screwdriver to install the self-tapping screws that attach the mounting brackets to
the rack is also recommended.
3.2 Installation Tools Required
The following tools are required to install the fuse platform:
• Phillips screwdrivers (#1 and #2)
• Flat-blade screwdrivers (medium and large)
• Torque screwdriver calibrated in pound-force inches or Newton meters
• Torque wrench calibrated in pound-force inches or Newton meters
• 3/8-inch and 7/16-inch sockets (for torque wrench)
• Wire cutter and wire stripper
• Compression lug crimper
• Wire-wrap tool
• Multimeter
• Heat gun
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© 2006, ADC Telecommunications, Inc.
ADCP-80-526 • Issue 6 • December 2006
3.3 Materials Required
The following materials are required to install the fuse platform:
• #2 AWG insulated copper wire for input power wires
• 2-hole compression lugs for #2 AWG wire (0.625 inches between centers)
• #10 AWG copper wire for ground connections
• Ring or spade-type connectors for output power wires
• #16 to #30 AWG insulated copper wire for alarm terminal screw-down barrier terminal
strip connectors (if present)
• #22 to #26 AWG insulated copper wire for alarm terminal wire-wrap pins (if present)
• Heat-shrink tubing
3.4 Continuity Tests
Each panel is thoroughly tested at the ADC factory before being shipped. However, before the
panel is installed, continuity tests, as described here, should be performed to verify that no
internal damage has occurred during shipping and handling.
Using a multimeter that is set to perform a continuity check, perform the following tests.
Test 1: Input Battery to Input Return—Perform this test on each input power terminal block.
Connect one test probe to the input power BATT (–) terminal and the other test probe to the
input power RTN (+) terminal. Verify that no continuity exists between the input power BATT
power terminal blocks.
TEST 1- POWER BUS B:
VERIFY NO CONTINUITY
EXISTS BETWEEN BATT
AND RTN TERMINALS
TEST 1- POWER BUS A:
VERIFY NO CONTINUITY
EXISTS BETWEEN BATT
AND RTN TERMINALS
18871-A
Figure 7. Test 1: Input Battery to Input Return
Test 2: Input Battery to Output Battery—Perform this test for each fuse position and fuse
1. Remove the fuse holder from the fuse platform.
2. Insert a working fuse into the fuse holder.
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© 2006, ADC Telecommunications, Inc.
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