ADCP-80-526
Issue 6
December 2006
PowerWorx® Power Distribution Products
Select Series™ Fuse Platform
User Manual
18858-A
1354430 Rev B
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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
Page iii
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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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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.
Page v
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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.
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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
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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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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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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
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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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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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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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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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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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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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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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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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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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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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3. Re-install the fuse holder (with working fuse).
4. Connect one test probe to the BATT (–) terminal on the input power terminal block.
5. Connect the other test probe to the BATT terminal on the output power terminal block.
6. Verify that continuity exists between the specified terminals.
7. Repeat the test procedure for the second fuse type, if present.
8. Repeat the test procedure for the second power bus, if present.
Note: When done, remove the working fuse from the fuse holder following completion of
this test and reinstall an empty fuse holder in each fuse holder position.
TEST 2- POWER BUS B:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 1 FUSED OUTPUT
BATT TERMINALS
TEST 2- POWER BUS A:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 1 FUSED OUTPUT
BATT TERMINALS
18872-A
Figure 8. Test 2: Input Battery to Output Battery (Type 1 Fuse)
TEST 3- POWER BUS B:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 2 FUSED OUTPUT
BATT TERMINALS
TEST 3- POWER BUS A:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 2 FUSED OUTPUT
BATT TERMINALS
18873-A
Figure 9. Test 2: Input Battery to Output Battery (Type 2 Fuse)
Test 3: Input Return to Output Return—Do the following test for each input power position
1. Connect one test probe to the input power RTN (+) terminal
2. Connect the other test probe to the RTN terminal on the output power terminal block.
3. Verify that continuity exists between the specified terminals.
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4. Repeat the test procedure for second fuse type, if present.
5. Repeat the test procedure for the second power bus, if present.
TEST 4- POWER BUS B:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 1 FUSED OUTPUT
RTN TERMINALS
TEST 4- POWER BUS A:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 1 FUSED OUTPUT
RTN TERMINALS
18874-A
Figure 10. Test 3: Input Return to Fused Output Return (Type 1 Fuse)
TEST 5- POWER BUS B:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 2 FUSED OUTPUT
RTN TERMINALS
TEST 5- POWER BUS A:
VERIFY THAT CONTINUITY
EXISTS BETWEEN INPUT
AND TYPE 2 FUSED OUTPUT
RTN TERMINALS
18875-A
Figure 11. Test 3: Input Return to Fused Output Return, (Type 2 Fuse)
Test 4: Alarm Terminals—Connect the test probes alternately between the C and NC terminals
and the C and NO terminals on each set of alarm terminals. Verify that no continuity exists
between the C and NC terminals and that continuity exists between the C and NO terminals.
If the fuse platform fails any of the specified tests, it is defective and must not be installed.
(Return Material Authorization) and to reorder if replacement is required.
4 INSTALLATION
This section provides procedures for mounting the fuse platform on a rack and installing wiring.
Wiring includes input, grounding, alarm, and output wiring.
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Caution: This equipment employs electrical voltage and amperage levels which 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 fuse platform is energized. Only insulated tools should be used on
energized elements of the fuse platform.
Warning: Never install telephone equipment in a wet location or during a lightning storm.
When installing or modifying telephone lines, disconnect lines at the network interface before
working with uninsulated lines or terminals to prevent electrical shock.
Warning: Do not install fuses in fuse platform or power source until you have completed the
power wiring connections.
Note: Do not apply power to the fuse platform until all testing and wiring are completed.
4.1 Installing Cable Management Bar (Optional Item)
Before installing the fuse platform in the rack, mount the cable management bar (accessory
screws are provided with the cable management bar. The cable management bar can be recess
mounted by using the mounting holes closest to the front of the fuse platform. Tighten all
screws to 9 pound force-inches (1 Newton-meter) of torque to insure grounding.
Caution: When attaching the cable management bar to the fuse platform, use only the 1/4-inch
(6.350 mm) long 4-40 screws that are supplied with the cable management bar. Use of any other
hardware could cause contact with internal parts of the fuse platform.
MOUNTING BRACKET
INSTALLED FOR
19-IN. (48.26 CM)
RACK MOUNTING
ATTACH TO
EITHER SET
OF 3 HOLES
CABLE
MANAGEMENT
BAR
18863-A
Figure 12. Cable Management Bar Installation
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4.2 Mounting Fuse Platform on Rack
The fuse platform can be mounted in either a 19- or 23-inch (48.26 or 58.42 cm) wide rack. Two
sets of mounting brackets, one set for 19-inch racks and one set for 23-inch racks, are provided
with the fuse platform.
Eight 5/16-inch (7.936 mm) long, thread-forming, Phillips-drive, 8-32 flat-head screws are
provided for attaching the mounting brackets to the panel. Four 3/8-inch (9.53 mm) long,
Phillips-drive, 12-24 pan-head screws (with flat washers) are provided for attaching the
mounting brackets to the equipment rack.
Note: A fuse platform with the cable management bar attached may exceed the 12 inch
(305 mm overall depth objective described in GR-63 CORE, 02-14.
Caution: When attaching the mounting brackets to the fuse platform, use only the 5/16-inch
(7.94 mm) long, thread-forming, flat-head screws supplied with the fuse platform. Use of any
other hardware could cause contact with internal parts of the fuse platform. If parts are
missing, contact ADC to order replacement parts.
Use the following procedure to attach the mounting brackets to the fuse platform and to install
the fuse platform in the equipment rack:
1. Select the set of mounting brackets (19- or 23-inch) that correspond to the width of the
equipment rack into which the fuse platform will be installed.
3. Attach the brackets to the sides of the fuse platform using the eight 5/16-inch (7.94 mm)
long flathead screws provided. Tighten screws to 15 pound force-inches (1.7 Newton
meters) of torque to insure grounding.
19-INCH RACK
INSTALLATION
5/16-INCH (7.94 MM)
8-32 FLAT-HEAD
THREAD-FORMING
SCREWS
23-INCH RACK
INSTALLATION
TIGHTEN MOUNTING SCREWS
TO 15 POUND-FORCE INCHES
(1.7 NEWTON METERS) OF TORQUE
18864-A
Figure 13. Mounting Brackets
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4. Place the fuse platform in the specified mounting space within the rack.
inch (9.53 mm) long pan-head screws and flat washers provided.
Caution: Do not use any hardware other than the hardware supplied with the fuse platform.
TIGHTEN MOUNTING SCREWS
TO 27 POUND-FORCE INCHES
(3.1 NEWTON METERS) OF TORQUE
DETAIL DRAWING OF
MOUNTING SCREWS
AND WASHERS
USE #12 STAR WASHERS INSTEAD OF FLAT
WASHERS IF REQUIRED BY LOCAL PRACTICE
18865-A
Figure 14. Mounting Fuse Platform on Rack
4.3 Grounding Chassis
Use the following procedure to connect the panel to an approved office ground source:
1. Obtain two lengths of #10 AWG wire for use as the chassis grounding wires.
Note: A single ground wire can also be used. If using a single ground wire, use #6 AWG
wire terminated at either stud.
2. Terminate one end of each wire with the #10 ring terminals provided (requires crimper).
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DETAIL DRAWING
OF GROUNDING
WIRE CONNECTION
18868-A
TIGHTEN STUD NUT TO
23 POUND-FORCE INCHES
(2.6 NEWTON METERS)
OF TORQUE
Figure 15. Chassis Ground Connections
4. Connect the ring terminal end of each wire to one of the studs and secure using the nuts
with captive star washers provided (requires 3/8-inch socket). Tighten each stud nut to 23
pound-force inches (2.6 Newton meters) of torque.
5. Route the free end of each chassis grounding wire to an approved office ground source.
6. Cut each chassis grounding wire to length and connect it to the office ground source as
required by local code or practice.
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4.4 Connecting Alarms
Depending on the model being installed, the fuse platform will have either of two types of alarm
connectors on the rear side of the platform:
• Screw-down barrier terminal strip
• Wire wrap pin
Figure 16 shows the two types. Connect the connectors as follows:
•
•
Screw-down barrier terminal strip: The terminal screw size is 3-48. Terminate wire leads
with crimp-on spade lug or ring connectors that have a maximum width of 0.200 (5.080
mm) or use #16 to #30 AWG copper wire without lugs (insulation stripped back). In
selecting wire size, follow local code referring to the ampacity guidelines provided in
Appendix A of this manual.Tighten the terminal screws to approximately 9 pound-inches
(1 Newton-meter) of force.
Wire-wrap terminal: Wrap terminal block pins using #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.
SCREW-DOWN BARRIER TERMINAL STRIP
CONNECT TO CORRESPONDING
ALARM CONNECTORS
CONNECT TO REMOTE ALARMS
CONNECT TO REMOTE ALARMS
WIRE-WRAP PIN TERMINAL BLOCK
CONNECT TO CORRESPONDING
ALARM CONNECTORS
CONNECT TO AUDIO ALARMS
CONNECT TO VISUAL ALARMS
CONNECT TO REMOTE ALARMS
17056-A
Figure 16. Alarm Contact Connections
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4.5 Connecting Output Power
Output power is supplied to the equipment through screw-down barrier terminal strips located
on the rear of the chassis. Each bus has separate strips for each fuse type. 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).
Connections are typically made using ring or spade-type connectors crimped onto the output
# accepted for copper wire. In selecting wire size, follow local code referring to the ampacity
guidelines provided in Appendix A of this manual.
appropriate set of terminal strips. Use the appropriate wire size with appropriate size crimp-on
spade lugs or ring connectors or use the appropriate size wire with insulation stripped back at
the wire end. Tighten the screws to approximately 9 pound force-inches (1 Newton-meter) of
torque.
POWER
FEED
TERMINALS
DETAIL DRAWING OF OUTPUT
TERMINAL BLOCK CONNECTIONS
TIGHTEN TERMINAL SCREWS
TO 15 POUND-FORCE INCHES
(1.7 NEWTON METERS)
OF TORQUE
POWER
RETURN
TERMINALS
18869-A
BUS A
GMT FUSED
POWER OUTPUT
TERMINALS
BUS A
KLM/KTK FUSED
POWER OUTPUT
TERMINALS
Figure 17. Output Power Connections
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ADCP-80-526 • Issue 6 • December 2006
Caution: Connecting the equipment to the wrong circuit may cause damage to the equipment or
the fuse platform. Make sure the fuse is the correct type and has the correct current rating as
specified by the equipment manufacturer.
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.
4.6 Connecting Input Power
Input power is supplied to the fuse platform through the single or dual terminal blocks located
on the rear of the platform. Each input terminal block consists of two pairs of 0.25-inch studs
that are used for connecting the BATT (battery –) and RTN (return +) input power cables.
The stud pairs are mounted on 0.625 inch centers and accept 2-hole compression lugs. The
maximum lug width is 0.62 inches. Nuts with captive washers are provided to secure the
compression lugs to the terminal block.
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.
Caution: Connect only the input voltage wire [the wire labeled BATTERY or BATT, or labeled
with the negative (–) voltage polarity and/or the voltage value] to the connector on the fuse
platform labeled BATTERY. Connect only the input return wire [the wire labeled RTN,
RETURN, or BATTERY GROUND, or labeled with the positive (+) voltage polarity] to the
connector on the fuse platform labeled RETURN.
Caution: Caution should be taken to not reverse the input wires to the fuse platform. Within the
panel, the internal return wiring is not protected by fuses. If the wires are reversed, current will
flow through the unprotected return wiring in the panel to the equipment. This condition can
cause damage to the equipment in the frame in which the panel is installed and to equipment in
adjacent frames
Use the following procedure to connect the input power cables to the fuse platform:
1. Obtain eight lengths of #2 AWG wire for use as the input power cables.
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ADCP-80-526 • Issue 6 • December 2006
2-HOLE LUG
TERMINAL
HEAT SHRINK
TUBING
(2-INCH LENGTH)
#2 AWG
COPPER
WIRE
STRIP BACK 7/8 INCH
OF INSULATION
17950-A
Figure 18. 2-Hole Lug Terminal Installation
3. Slide a 2-inch length of heat shrink insulation over the end of each wire.
4. Terminate one end of each wire with the 2-hole lug terminals provided (requires crimper).
5. Slide the heat shrink insulation down to the lug terminal so the barrel end of the terminal is covered.
6. Use a heat gun to apply heat to the heat shrink insulation until it tightens around the wire
and barrel end of the terminal.
7. Form each input cable into the shape required for connection to the input terminals and
secure to side of rack.
8. Use the nuts (with captive star washers) provided to secure the input power wires to the
terminals, labeled BATT and RTN. Connect the wires to the terminals as follows:
a. Battery wires: Connect to BATT (–) terminals on the A and B input power terminal
blocks.
b. Return wires: Connect to RTN (+) terminals on the A and B input power terminal
blocks.
9. Use a torque wrench (with a 7/16-inch socket) to tighten the input power terminal block
nuts to 32 pound-force inches (3.6 Newton meters) of torque.
10. Route the free end of each input power cable to the office battery source.
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ADCP-80-526 • Issue 6 • December 2006
18870-A
TIGHTEN INPUT TERMINAL
NUTS TO 32 POUND FORCE INCHES
(3.6 NEWTON METERS) OF TORQUE
Figure 19. Input Power Connections
11. Connect the input power cables to the office battery power source in accordance with
applicable local electrical codes and/or National Electrical Codes.
Caution: Do not apply power to the fuse platform until instructed to do so for testing (see
4.7 Installing Protective Covers
Install the rear protective covers over the connectors at the rear of the fuse platform when all the
To install the plastic protective cover, thread the four 3/8-inch (9.53 mm) long, Phillips drive, 6-
32 pan-head screws into the standoffs located between the output power screw-down terminal
strips. Rotate each screw approximately two turns to get it started. Hold the cover so the
lettering is oriented properly and then install the cover over the screw heads. Slide the cover to
the left and then tighten the screws.
4.8 Installing GMT Fuse Designation Pins
Color-coded fuse designation pins (accessory item) are available for GMT fuses. The pin color
corresponds to the color of the fuse indicator. Insert the appropriate color-coded pins (accessory
item) into the corresponding holes in each GMT fuse holder as required.
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ADCP-80-526 • Issue 6 • December 2006
4.9 Installing Fuse Designation Card Holder and Card
Attach the fuse designation card holder to the fuse platform, to one of the fuse platform mount-
ing brackets, or to a part of the rack. Remove the backing from the back of the card holder and
press the card holder against the mounting surface. Fill out one of the cards with the required
circuit information insert it in the card holder.
4.10 Installing Voltage Designation Label
Write the voltage used in the fuse platform on the voltage designation label and attach the label
to the back of the fuse platform.
4.11 Installing Fuses
Replace the dummy fuses in the fuse holder with the appropriate type and value fuses. Leave the
dummy fuses in unused fuse positions.
5 SYSTEM CHECK
Perform the following procedures to check out the platform after completing installation.
5.1 Wiring Connections Torque Measurements
Measure the torque of all input, output, chassis ground and fuse alarm relay contact connections
included in the non-powered testing paragraphs above using a torque screwdriver that is
calibrated in pound force-inches (Newton-meters). The torque specifications are printed on the
rear of the panel adjacent to the connector.
5.2 Power Indication Test
After checking input resistance and verifying the wiring connections torque, power may be
applied to the fuse platform. Upon power application, the fuse alarm indicators will not light
unless no fuse is in the fuse holder or a fuse that has failed is in the fuse holder.
Note: The KLM fuse positions require that a load be connected to the corresponding
outputs in order for the indicators to light.
The fuse alarm relay should indicate an open circuit between the normally open (NO) terminals
and the common (C) terminals and a closed circuit between the normally closed (NC) terminals
and the common terminals.
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ADCP-80-526 • Issue 6 • December 2006
5.3 Connection Polarity Test
Use the following procedure to check that the power input wires are connected for correct
polarity:
1. Verify that the input power cables are connected to the correct terminals.
2. Verify that the circuit breakers for all circuits are on.
3. Using a multimeter set to measure DC voltage, measure the voltage between each input
power (RTN) terminal and chassis ground. The voltage level should be less than 2.0 Vdc.
4. If the voltage is much higher, and reads out in the –30 to –60 Vdc range, the input leads are
probably reversed. If this appears to be true, power down the panel. Disconnect the
negative (BATT) and positive (RTN) input lugs and switch them around. Power up the
panel and check again to verify that the higher voltage is on the negative (BATT) lug.
5. If the problem is such that you can’t figure it out with these instructions, consult with ADC
Technical Assistance Center (TAC).
5.4 GMT, TPA Fuse Alarm Test
Place a fuse that has failed in one of the fuse positions on each bus. The visual fuse alarm
LED(s) will change from unlit to lit (red light), and the fuse alarm relay will operate. Replace
the failed fuses with known good fuses.
5.5 KLM Fuse Alarm Test
Perform the following tests:
Note: The KLM fuse positions require a load connected to the corresponding outputs to
light the fuse alarm indicators.
1. With the fuse platform powered, no load on the outputs, and no KLM fuses installed,
verify that no fuse alarm LED is lit (no red light). Verify that the fuse alarm relay indicates
an open circuit between the NO contact and the C contact at the fuse alarm contacts.
2. Connect a 10 kohm, ½ watt resistor between each KLM fuse output (labeled BATT) and
return (labeled RTN). Verify that each KLM fuse alarm LED lights (red light) when the
corresponding load is connected. Verify that the fuse alarm relay indicates a short circuit
between the NO contact and the C contact at the fuse alarm contacts.
3. Insert a known good KLM fuse in each fuse position, one at a time, and verify that the
corresponding fuse alarm LED is off.
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ADCP-80-526 • Issue 6 • December 2006
6 OPERATION
Caution: This equipment employs electrical voltage and amperage levels which 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 fuse platform is energized. Only insulated tools should be used on
energized elements of the fuse platform.
All fuse platform circuits are operational as soon as power is applied to the input connectors.
The alarm indicator should not light when power is applied.
Operation of the fuse platform consists of removing and replacing fuses when a fuse fails. If a
fuse fails, the alarm indicator lights, and the external and remote alarms are activated (if
present).
7 MAINTENANCE
Caution: This equipment employs electrical voltage and amperage levels which 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 fuse platform is energized. Only insulated tools should be used on
energized elements of the fuse platform.
7.1 Inspection
Inspect the fuse platform periodically (every six months is recommended) for damage to the
fuses and for damaged or broken wires on the power outputs and the external alarm
connections. Inspect for excessive dust and dirt that may block the vents.
7.2 Cleaning
If excessive dirt is found during the inspection, brush or wipe dust and dirt from the fuse
platform with a soft bristle brush or soft cloth. Take care not to not damage the fuses or any
wiring.
7.3 Fuse Removal
The GMT fuses can be removed with the aid of a wire hook or tweezers-type fuse puller. A fuse
puller is available as an accessory item. A TPA or KLM fuse may be removed by pulling the
fuses straight out from the fuse holders.
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ADCP-80-526 • Issue 6 • December 2006
8 CUSTOMER INFORMATION AND ASSISTANCE
PHONE:
U.S.A. OR CANADA
Sales: 1-800-366-3891 Extension 73000
Technical Assistance: 1-800-366-3891
Connectivity Extension 73475
Wireless Extension 73476
EUROPE
Sales Administration: +32-2-712-65 00
Technical Assistance: +32-2-712-65 42
EUROPEAN TOLL FREE NUMBERS
Germany:
UK:
Spain:
France:
Italy:
0180 2232923
0800 960236
900 983291
0800 914032
0800 782374
ASIA/PACIFIC
Sales Administration: +65-6294-9948
Technical Assistance: +65-6393-0739
ELSEWHERE
Sales Administration: +1-952-938-8080
Technical Assistance: +1-952-917-3475
WRITE:
ADC TELECOMMUNICATIONS, INC
PO BOX 1101,
MINNEAPOLIS, MN 55440-1101, USA
ADC TELECOMMUNICATIONS (S'PORE) PTE. LTD.
100 BEACH ROAD, #18-01, SHAW TOWERS.
SINGAPORE 189702.
ADC EUROPEAN CUSTOMER SERVICE, INC
BELGICASTRAAT 2,
1930 ZAVENTEM, BELGIUM
PRODUCT INFORMATION AND TECHNICAL ASSISTANCE:
13944-RM
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages.This disclaimer of
liability applies to all products, publications and services during and after the warranty period.This publication may be
verified at any time by contacting ADC's Technical Assistance Center.
© 2006, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A.
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ADCP-80-526 • Issue 6 • December 2006
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ADCP-80-526 • Issue 6 • December 2006
APPENDIX A: ALLOWABLE AMPACITIES OF INSULATED CONDUCTORS
This appendix provides guidelines for selecting AWG wire size based on the temperature rating
of the conductor and the anticipated load. The information contained is from Table 310-16 of
the National Electrical Code document, ANSI/NPFA 70 (1978).
Note: Information for aluminum conductors has been omitted from the table here
because copper conductors only are recommended for use with the ADC panel.
Table 310-16 (NEC): Allowable Ampacities of Insulated Conductors, Rated O Through 2000 Volts, 60° to
90°C (140° to 194°F), Not More Than Three Current-Carrying Conductors in Raceway or Cable or Earth
(Directly Buried), Based on Ambient Temperature of 30°C (86°F)
SIZE
TEMPERATURE RATING OF CONDUCTOR
AWG
KCMIL
60°C
60°C
60°C
(114°F)
(114°F)
(114°F)
TYPES
TBS, SA,
SIS, FEP*,
FEPB*, MI,
RHH*, RHW-2,
THHN*,
THHW*, THW-2*,
THWN-2*,
TYPES
FEPW*,
RH*, RHW*,
THHW*,
THW*,
USE-2,
XHH,
THWN*,
XHHW*,
USE*, ZW*
XHHW*
XHHW-2
ZW-2
TYPES
TW*,
UF*
18
16
14
12
10
8
....
....
....
14
....
18
20*
25*
30
20*
25*
35*
50
25*
30*
40*
55
40
6
55
65
75
4
70
85
95
3
85
100
115
130
150
175
200
230
255
285
310
335
110
130
150
170
195
225
260
290
320
350
380
2
95
1
110
125
145
165
195
215
240
260
280
1/0
2/0
3/0
4/0
250
300
350
400
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ADCP-80-526 • Issue 6 • December 2006
Table 310-16 (NEC): Allowable Ampacities of Insulated Conductors, Rated O Through 2000 Volts, 60° to
90°C (140° to 194°F), Not More Than Three Current-Carrying Conductors in Raceway or Cable or Earth
(Directly Buried), Based on Ambient Temperature of 30°C (86°F)
SIZE
TEMPERATURE RATING OF CONDUCTOR
AWG
KCMIL
60°C
60°C
60°C
(114°F)
(114°F)
(114°F)
TYPES
TBS, SA,
SIS, FEP*,
FEPB*, MI,
RHH*, RHW-2,
THHN*,
THHW*, THW-2*,
THWN-2*,
TYPES
FEPW*,
RH*, RHW*,
THHW*,
THW*,
USE-2,
XHH,
THWN*,
XHHW*,
USE*, ZW*
XHHW*
XHHW-2
ZW-2
TYPES
TW*,
UF*
500
600
320
355
385
400
410
435
455
495
520
545
560
380
420
460
335
490
520
545
590
625
650
665
430
475
520
380
555
585
615
665
705
735
750
700
750
800
900
1000
1250
1500
1750
2000
CORRECTION FACTORS
For ambient temperatures other than 30C (86F), multiply
the allowable ampacities shown by the appropriate factor shown below.
21-25
26-30
31-35
36-40
41-45
46-50
51-55
56-60
61-70
71-80
1.08
1.00
.91
.82
.71
.58
.41
....
1.05
1.00
.94
.88
.82
.75
.67
.58
.33
....
1.04
1.00
.96
.91
.87
.82
.76
.71
.58
.41
....
....
* Unless otherwise specifically permitted in the code, as defined in the NEC document cited
(ANSI/NEC 70), the overcurrent protection for conductor types marked with an asterisk (*)
shall not exceed 15 amperes for No. 14, 20 amperes for No. 12, and 30 amperes for No. 10
copper, after any correction factors for ambient temperature and number of conductors have
been applied.
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