Amphenol GMT Series User manual

High-Power 20A GMT Series Fuse Panels
Power :: 20HPGMTXX
User Manual
Applies to : 20HPGMT05R :: 20HPGMT05FR :: 20HPGMT05FSR :: 20HPGMT05BNR :: 20HPGMT12R-75 ::
20HPGMT03R :: 20HPGMT02R

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High-Power 20A GMT
Series Fuse Panels
Table of Contents
1.1 Overview ............................................................................................................................1
1.1.1 Specifications .......................................................................................................... 2
1.1.2 Standard & Special Features ...................................................................................5
1.1.2.1 Bay & Failure Alarm Options ............................................................................6
1.1.2.2 Fail-Safe Circuit ............................................................................................... 7
1.1.2.3 Power-Line Noise Filter ....................................................................................7
1.2 Installation ..........................................................................................................................8
1.2.1 Rack-Mounting Conditions and Considerations ........................................................8
1.2.2 Inspection ................................................................................................................8
1.2.3 Installing the Panel..............................................................................................9
1.2.4 Replacing the Alarm Board................................................................................. 13
1.3 Service............................................................................................................................. 13
1.3.1 Owner Maintenance................................................................................................13
1.3.2 In-Warranty Service ................................................................................................ 14
1.3.3 Out-Of-Warranty Service......................................................................................... 14
1.3.4 Repacking for Shipment ..........................................................................................14
1.4 Parts & Accessories.......................................................................................................... 14
1.5 Diagrams...........................................................................................................................16
1.5.1 Block Diagram. .......................................................................................................16
1.5.2 1RU Dimensions .................................................................................................... 17
1.5.3 2RU Dimensions .................................................................................................... 18
1.6 Certificate of Conformity ...................................................................................................19
List of Figures
Figure 1 - 20HPGMT05BNR (1RU Panel) Front and Rear View............................................... 1
Figure 2 - 20HPGMT12R-75 (2RU Panel)...............................................................................1
Figure 3 - Model 20HPGMT05R (Front View) .......................................................................... 2
Figure 4 - Alarm Panel............................................................................................................ 5
Figure 5 - Model 20HPGMT05BNR (Rear View) .....................................................................5
Figure 6 - Standard Alarm Hookups........................................................................................6
Figure 7 - Alarm Hookups ....................................................................................................... 6
Figure 8 - Mounting Dimensions ............................................................................................. 9
Figure 9 - Ground Lug Connection.........................................................................................10
Figure 10 - Compression Lug Inputs ..................................................................................... 10
Figure 11 - Replacing the Alarm Board...................................................................................13
Figure 12 - Power, Battery Return and Fuse Circuit ................................................................ 16

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High-Power 20A GMT
Series Fuse Panels
User Guide, Part Number 130339-9 A0
Copyright 2020, Amphenol Network Solutions, All rights reserved.
Amphenol Network Solutions
22425 E. Appleway Ave #11
Liberty Lake, WA 99019
Amphenol Network Solutions assumes no liability from the application or use of theseproducts.
Amphenol Network Solutions does not convey any license under its patent rights nor the patent
rights of others. This document and the products described herein are subject to change without notice.
About
Amphenol Network Solutions is a global innovative original equipment manufacturer that serves the
data and communications markets. We design, manufacture, and distribute products for customers
who need an end to end solution for network connectivity, fiber, power distribution and rack
management. We collaborate with our customers to deliver product solutions that exceed
expectations with innovative designs and world class quality. Amphenol Network Solutions is the
industry thought leader on network cable management.
Telect, Inc. has been a market leader in secondary DC power distribution
for over 36 years. Through our acquisition by Amphenol and our merger
with All Systems Broadband, to become Amphenol Network Solutions, we
have continued to deliver reliable, high-quality solutions to power, protect,
and monitor today’s network servers and equipment. We are proud to be an
Amphenol company that will continue to be Powered by Telect.
Technical Support
Email: [e-mail]
Phone: [phone]

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High-Power 20A GMT
Series Fuse Panels
1.1 Overview
Amphenol Network Solutions’ High-Power 100A
GMT Series Fuse Panels provide protected
secondary distribution of -48 VDC power to
telecommunications equipment at the bay level.
Fuse panels are available for GMT
outputs up to 20A per position in dual-circuit (10/10 and
15/15) panel configurations.
Standard features include
• Dual-circuit, 100A input buses, -48 VDC
• Discrete GMT fuse positions: 20A capacity without
fuse management for heat dissipation
• Alarm circuit board replaceable with panel in
service (hot-swap)
• Minimal rack space: one, 1.75"
• EIA or 2" WECO rack unit (1RU) for rear access
connections; 2RU for total front access of dual-
circuit 10/10 configuration
• 19" or 23" rack mounting, with mounting brackets
provided.
• Transparent terminal cover meets electrical and
equipment safety standards.
• Dummy GMT fuses are provided for all fuse
holders.
• Holes provided in chassis for inserting colored fuse
designation pins
• All 20HPGMT panels are NEBS (Level 3).
• Fire rating: UL 94V-0 and/or VW-1 (for wiring)
• All models except 20HPGMT05R are recognized
by UL for USA and Canada. 20HPGMT05R is UL
listed for USA and Canada.
• 20HPGMT05FSR supports common returns
Figure 1 - 20HPGMT05BNR (1RU Panel) Front
and Rear View
Figure 2 - 20HPGMT12R-75 (2RU Panel)

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High-Power 20A GMT
Series Fuse Panels
POWER
Special features include
• Bay Alarm Circuitry (20HPGMT05BNR)
• Fail-Safe Circuitry (20HPGMT05FR and 20HPGMT05FSR only): load sharing permits either feed to power all
loads if the other feed fails.
• Noise Filter Circuitry (20HPGMT05BNR)
Amphenol Network Solutions’ High-Power GMT Series Fuse Panels use discrete, not modular, GMT fuse holders, to
limit heat buildup when using 15A and 20A GMT fuses.
Figure 3 - Model 20HPGMT05R (Front View)
1.1.1 Specifications
Environment: Specifications:
Temperature range
-5°C to 55°C (-23°F to 131°F)
Humidity
5% to 85% and noncondensing
Altitude range
-197 ft to 13,100 ft (-60 m to 4000 m)
Acoustic noise 0 dBA above ambient
Fit & Finish
Specifications:
Material
(Custom color/finish available)
Cold-rolled steel, powder-coat telephone grey, baked
polyurethane. Clear polycarbonate protective
terminal cover.
Weights (Approximate)
Specifications:
Weight
8 to 12 lb (~3.5 to 5.5 kg), depending on model

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High-Power 20A GMT
Series Fuse Panels
Mechanical Interface:
Specifications:
Input terminals — Compression
Stud:
1
⁄
4
-20 with nut. (Use
7
/
16
-in. [12 mm] socket.)
Lugs: Dual-hole compression lug (5/8in. center to center).
0.516 in. (13.4 mm), max. lug width
Cable: Up to 1/0 AWG copper, depending on input
interruption device
Torque: 62 in.-lb (~6.8 N•m), max.
Output terminals —
Wire binding / Compression
Screw: #6 Phillips* panhead
Wire: 14 to 22 AWG, copper wire Lug: 10 to 22 AWG,
copper wire
Spacing: 3/8in. (9.5 mm) centerline with barrier distance of
0.260 in. (6.6 mm)
Torque: 9 in.-lb (~1.0 N•m), max.
Alarm terminals — Wire Wrap
0.045 in. square wirewrap pins on 0.156 in. centers. Use 18 to
22 AWG copper
Ground terminals Screws: 2, #10 Phillips* panhead
Lugs: Single- or dual-hole compression lug (5/8in.
center to center). Dual-hole lug is recommended.
Cable: Up to #6 AWG copper for single-hole lug (Conductor
size depends on input interruption device.)
Torque: 21 in.-lb (~2.5 N•m), max.
* Screws with cross-recessed heads
Dimensions:
Specifications:
Dimensions (nominal) without brackets for all but
20HPGMT12R-75
Width: 17 in. (432 mm)
Height: 1.75 in. (44.4 mm)
Depth: 12 in. (305 mm)
Dimensions (nominal) without brackets for
20HPGMT12R-75
Width: 17 in. (432 mm)
Height: 3.5 in. (89 mm)
Depth: 7.5 in. (190 mm)
† See Pages 17 and 18 for exact dimensions.

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High-Power 20A GMT
Series Fuse Panels
Electrical Interface:
Specifications:
Operating voltage
-48 Vdc, both sides
Current capacity
All Except 20HPGMT05FR
100A per bus (200A total for dual-circuit panels), max.
20HPGMT05FSR
20HPGMT05BNR
20HPGMT05FR
150A max. total (recommended 75A max. per bus)
20HPGMT05FSR
20HPGMT05BNR
75A per bus (150A total for both buses)
Fuse capacity:
20 or 30 (total, both circuits)
Maximum input interruption device rating
• 125A for all models except those with noise filters and
fail safe.
• 90A for models with noise filters
Maximum output interruption device rating 20A GMT fuse
Interrupt rating 450A
Short circuit withstand current
450A
Alarm contact relay 2A
Alarm board power rating @ 48 Vdc
1W
Panel heat dissipation per 100A bus @% load
1.0W (3.4 Btu/hr) @ 0%
1.2W (4.1 Btu/hr) @ 25%
4.8W (16.5 Btu/hr) @ 50%
11.4W (38.7 Btu/hr) @ 75%
21.3W (72.6 Btu/hr) @ 100%
Percentage of full load heat dissipation at nominal
voltage
less than 1% of total load wattage

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High-Power 20A GMT
Series Fuse Panels
1.1.2 Standard & Special Features
GMT fuses are available in capacities ranging from 0.18A to 20A. A unique feature of the Amphenol Network
Solutions High-Power GMT Fuse Panel is that the fuse positions are oriented so the identification flags face down
to provide easy location of a blown fuse when the panel is at the top position of a relay rack or bay. (GMT splash
covers are optional for maximum safety when fuses blow.) Another unique feature of the GMT panels is a small
hole below each fuse position to accommodate color-coded optional designation pins. Designation pins are
useful for quickly identifying required fuse positions and rating of the fuses. The panel is delivered with dummy
fuses in all positions.
The standard front panel includes dual-color LEDs for power and failure alarms on the face of an easily
removable/replaceable alarm card:
• The POWER LEDs are green when power is on
and red when power to that side goes off.
• The FAIL ALARM LED is green when all installed
fuses are OK and red when any installed, operable
fuse blows.
Below the LEDs and alarm card is a pull-out circuit
designation card accommodating up to 40 circuit
designation entries.
Figure 4 - Alarm Panel
The back panel of the 1RU panels contains input and output terminal connections (NEG or POS connections at
the top; RTN connections below), chassis ground connections, and wirewrap pins for external alarm hookups.
Figure 5 - Model 20HPGMT05BNR (Rear View)
C U
L
US LISTED
OHPGMT05R Rev : A
SN: 0206381 L#:E179636
WK-YR: 11-1999
A POWER B POWER
FAIL 20A MAX/FUSE
ALARM

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High-Power 20A GMT
Series Fuse Panels
Maj NC Min RTN Min NC
External
Alarm
Device
-Vdc
External
Alarm
Device
-Vdc
External
Alarm
Device
1.1.2.1 Bay & Failure Alarm Options
The panel is available with alarm relays for standard
remote/visual/audible failure alarms to light lights and
sound alarms when either power feed to the panel fails
and/or any fuse blows. Along with the standard alarms,
Model 20HPGMT05BNR includes major/ minor bay
alarms. Bay alarms are controlled externally to turn
on the panel’s Form C relay contacts in-circuit with
external bay devices or connections. Whenever a bay
alarm occurs, the A POWER LED (for a major alarm)
or B POWER LED (for a minor alarm) will blink until
external control is turned off.
Models 20HPGMT05FR and 20HPGMT05FSR include
enhanced power/fuse failure alarms that replace the
standard failure alarms. Where the standard failure
alarm doesn’t differentiate between power or fuse
failure, the enhanced power/fuse failure alarms
differentiate between A POWER, B POWER,and fuse
failures.
NC NC
C C
NO NO
R V A
E I U
M S D
O U I
T A B
E L L
E
Figure 6 - Standard Alarm Hookups
Maj In Maj RTN Min In MAJ MI N P WR P WR FUSE
Maj NO C Min NO
A B
NC NC
C C
NO NO
A
R
PWR PWR
-Vdc
Bay Alarms (20HPGMT05BNR)
-Vdc
A B FUSE
NC NC
C C
NO NO
RTN RTN
Enhanced Alarms (20HPGMT05FR and
20HPGMT05FSR)
Figure 7 - Alarm Hookups
al
TN
Ex
Al
De
R
External
Alarm
Device

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High-Power 20A GMT
Series Fuse Panels
1.1.2.2 Fail-Safe Circuit
Schottky diodes are cross-connected at the input to the power distribution circuits. When both power supplies are
energized in a dual-circuit panel, power is balanced between the two supplies by the diodes. If one power supply
loses its power or is shut down, the other supply shares its power with both outputs (A and B) through the
Schottky diodes. The battery return circuits for A and B must be common for both circuits to operate from either
the A or B power souce in fail-safe mode. With the 20HPGMT05FR, the user must make the returns common
within the overall power system, external to the fuse panel. With the 20HPGMT05FSR, the returns are made
common internal to the fuse panel and, no further action by the user is required.
Fail safe panels can distribute a maximum of 150A total in fail safe mode; a maximum of 75A per bus is recom-
mended. The fail-safe feature also includes the enhanced failure alarms described previously.
NOTE: For the fail safe load sharing to function properly, the capacity of each of the user-supplied external feeder
fuses or breakers must be greater than the total load of the panel’s A and B outputs combined. For
example, if the panel’s total Load A = 10A and Load B = 10A, then the feeder fuse for Side A and Side B must
each be at least 20A (up to 175A). If the panel goes into Fail Safe mode, the lone input terminal can handle up
to 150A.
1.1.2.3 Power-Line Noise Filter
The filter characteristics under load are such that high-frequency transients are suppressed below effective
interference levels for telecommunications equipment used with the panel. With this filter option, the max capacity
of the bus is 75A. Typical filter characteristics are:
60 Hz -44dB 200 Hz -58dB 1kHz -96dB 10kHZ -102dB

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High-Power 20A GMT
Series Fuse Panels
1.2 Installation
1.2.1 Rack-Mounting Conditions and Considerations
Elevated operating temperature: If you install this equipment in a closed or multi-unit rack assembly, the
operating ambient temperature of that environment may become higher than room temperature. Be sure to install
the equipment in an environment that can become no warmer than the manufacturer’s specified maximum
ambient temperature (Tma).
Reduced air flow: Make sure the air flow around the equipment in a rack is enough for safe operation of the
equipment.
Mechanical loading: To prevent an accident, make sure the equipment load is even.
Circuit overloading: To prevent problems with the over-current protection and supply wiring,
take care not to overload the circuits. Pay attention to equipment nameplate ratings.
Reliable earthing: Maintain reliable earthing of rack-mounted equipment. Pay attention to supply connections as
well as direct connections to the branch circuit (i.e., use of power strips).
Disconnect device: Incorporate an easy-to-reach disconnect device in the building’s installation wiring.
1.2.2 Inspection
Please read and understand all instructions before beginning installation. If you have questions, contact Amphenol
Network Solutions Technical Support at [e-mail] or call 509.926.6000.
When you receive the equipment, carefully unpack it and compare it to the packaging list. Please report any
defective or missing parts to Amphenol Network Solutions Quality at [e-mail] or call
509.926.6000.
Amphenol Network Solutions is not liable for transit damaged. If the product is damaged, please report it to the
carrier and contact Amphenol Network Solutions Quality.

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High-Power 20A GMT
Series Fuse Panels
! ALERT
! ALERT
! ALERT
MOUNTING BRACKETS
1”
FRONT OR REAR PANEL
1 1/4”
(3” for FFA)
1 3/4”
(3 1/2” for FFA)
19” OR 23”
1” (19” RACK)
3” (23” RACK)
1.2.3 Installing the Panel
ALERT! Install this product within a restricted-access location where access is through the use of a tool,
lock and key, or other means of security, and is controlled by the authority responsible for the location.
Only qualified technicians may install and maintain this product.
ALERT! Verify all connections meet requirements specified in local electric codes or operating company
guidelines before supplying power. Protect this equipment with a fuse or breaker sufficient to interrupt
power levels specified under “Electrical Specifications,” on page 2.
ALERT! Each panel is tested at the factory. Amphenol Network Solutions recommends, however, that you
perform the testing out- lined in the following installation procedure to ensure that no damage has
occurred during shipping and handling. Both Sides A and B input circuits need to be tested.
Except for Dual-Circuit 20/20 GMT Panels, brackets are provided for either flush or extended EIA or WECO mount-
ing in a 19 in. or 23 in. rack. Mount the Dual-Circuit 20/20 GMT Panels to a 23-in EIA or WECO rack.
1. Locate an unused rack position and mount the panel using the four, 12-24 thread-cutting screws, washers,
and star washers provided. Figure 8 shows the hole locations.
2. Tighten screws to 35 in.-lb. (4.29 N•m).
Figure 8 - Mounting Dimensions
3. Remove the see-through cover.
4. Before connecting any conductor, use a multimeter to measure the resistance between the input NEG and
RTN terminals at the front or rear corners of the panel. Expect 500Ω or more for both Side A and Side B.

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High-Power 20A GMT
Series Fuse Panels
! ALERT
WARNING! Failure to properly ground this equipment can create hazardous conditions to installation per-
sonnel and to the equipment.
ALERT! Only use components and crimping tools approved by agencies or certifying bodies recognized
in your country or region such as Underwriter’s Laboratories (UL), TUV, etc.
5. For ground wiring: Use a listed (approved) crimping tool to attach a listed (approved), single- or dual-hole
compression lug (dual hole is highly recommended) suitable for a #10 stud (~5mm) on 5/8-in. (15.9 mm)
centers onto a suitable ground wire. (Ground wire can be up to #6 AWG for a single-hole lug. Conductor size
depends on input interruption device.)
6. Use a coarse, nonmetallic cleaning pad to clean terminals and stud(s).
7. Amphenol Network Solutions recommends that you lightly coat
anti-oxidant on the lug, grounding screw(s), and surrounding
contacting surface.
8. Connect the lug to the rear panel using the #10 screw(s)
provided, as shown in Figure 9.
9. Make sure the input power is off.
WARNING! Before connecting input power cables,
make sure the input power to the panel is turned off.
10. For input wiring:
a. Crimp dual-hole compression lugs for 1⁄4-in. studs
on 5/8-in. (15.9 mm) centers onto suitable copper
wires (#6 to 1/0 AWG) for NEG (or POS) and RTN
terminals, Feeds A and B. Lug width must not
exceed 0.52 in. (13.4 mm).
b. Use a coarse, nonmetallic cleaning pad to clean
the terminals and studs.
Figure 9-Ground Lug Connection
Figure 10 - Compression Lug Inputs
c. Lightly coat anti-oxidant on the lugs and input negative and positive terminals.
d. Connect the lugs to Feed A and B input terminals on the back of the panel using the 1⁄4-20 KEPs nuts and
washers provided, as shown in Figure 10.
e. Use a 7/16-in (12 mm) socket to tighten lugs to 62 in.-lb. (~6.8 N•m).
WARNING
!
WARNING
!

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High-Power 20A GMT
Series Fuse Panels
CAUTION
!
CAUTION
!
11. Make sure the power is off (open breaker, dummy fuse, or vacant fuse holder at power distribution unit [PDU])
before connecting this panel’s cables to the PDU.
12. Make sure that only dummy GMT fuses are installed in the panel or that the GMT fuse holders are vacant.
CAUTION! Disconnect all inputs before servicing this unit.
CAUTION! For a panel with an input noise filter, reversing the input cables between the positive and
negative terminals could result in damage to the panel. Double-check before proceeding to ensure that the
NEG (or POS) and RTN feeds from the PDU are cabled to the proper terminals.
13. Enable the fuse or breaker at the PDU (90A or 125A max., with or without the noise-filter feature, respectively)
to turn on Side A of the panel.
14. Check the voltage and polarity at the input connectors of the panel. Also, checkthat
• The A POWER LED on the front of the panel turns on (green).
• The FAIL ALARM LED turns green.
• The B POWER LED must remain red.
15. On the rear of the panel, with A POWER lit (normal operation) — but with the B POWER LED off (failure
operation) — test the power-fail relays:
• For a panel with standard failure alarms, test across the remote (R), visual (V), and audi- ble (A)pins.
When testing,
− Expect an open circuit (00Ω) between Terminals C and NC.
− Expect continuity (0Ω) between Terminals C and NO.
• For a panel with enhanced failure alarms (included with fail-safe feature), test at A PWR, B PWR, and F ALM
pins. When testing the A PWR and FALM pins,
− Expect continuity (0Ω) between Terminals C and NC.
− Expect an open circuit (00Ω) between Terminals C and NO. Conversely, when testing the B PWR pins,
− Expect an open circuit (00Ω) between Terminals C and NC.
− Expect continuity (0Ω) between Terminals C and NO.
16. Repeat Steps 13 to 15 for Feed B and watch to make sure the B POWER LED turns green. Also, across all
sets of alarm pins,
• Expect continuity (0Ω) between Terminals C and NC.
• Expect an open circuit (00Ω) between Terminals C and NO.
17. For output wiring, do either of the following:
• If using lugs, strip off 3/8in. (~10 mm) of insulation from one end of the copper output wires and then crimp
on ring or forked, single-hole lugs, as required by NEC. (Screw terminals will accommodate lugs for up to
10 AWG.)
• If using bare wire, strip off 5/8in. (~15 mm) of insulation. (Stranded wires should betinned.)

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High-Power 20A GMT
Series Fuse Panels
! ALERT
ALERT! GMT fuses have a small, inherent electrical resistance resulting in a small inherent power
loss. For this reason, the GMT fuse manufacturer recommends that the load for GMT fuses up to and
including 7.5A not exceed 80% of the fuse rating and that the load for GMT fuse sizes 10A, 15A, and
20A not exceed 70% of the fuse rating. For example, the load for a 15A GMT fuse should not exceed
10.5A (15A x 0.70 = 10.5A).
Total load for all fuse outputs on each side must not exceed 100A for a panel without the fail-safe feature,
or 75A for a panel with the fail-safe feature.
18. Amphenol Network Solutions recommends that you lightly coat anti-oxidant on lugs, wires, and output
negative and positive terminals before connecting the lugs/wires to outputs. (NEC specifies only one lug/
wire and load for each output terminal.)
19. Tighten the screws to 9 in.-lb. (~1.0 N•m).
20. Connect the other end of the output wires to load.
21. Use the pull-out designation card at the front of the panel to record outputs, as specified by operating
company standard operating procedures.
22. Make sure the inputs at loads are disabled by removing all power cards or all input fuses at the load
equipment.
Always follow the recommended operating company guidelines when disabling load equipment.
ALERT! Use only UL-listed circuit breakers or UL-recognized component secondary protection devices.
23. Insert the proper sizes of GMT fuses in designated fuse holders using the designation card to identify the
circuits. If applicable, install color-coded designation pins to match the fuses.
24. Check voltage and polarity at input of loads.
25. After you have installed all designated GMT fuses, check that the FAIL ALARM LED is still green. Again, test
the alarm relay contacts at R, V, A, F ALM pins on the rear of the panel. As before,
• Expect continuity (0Ω) between Terminals C and NC.
• Expect an open circuit (00Ω) between Terminals C and NO.
! ALERT

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High-Power 20A GMT
Series Fuse Panels
CAUTION
!
26. If available, replace one of the fuses with a blown fuse and check that the FAIL ALARM LED changes tored.
Check the R,V, A, F ALM pins again:
• Expect an open circuit (∞Ω) between Terminals C and NC.
• Expect continuity (0Ω) between Terminals C and NO. When finished, re-install the operablefuse.
27. If desired, wirewrap the remote external audio/visual alarm indicator wires (solid copper wires, #22 to #18
AWG) to the alarm terminals.
28. One by one, re-enable the load equipment and verify proper operation.
29. Re-install the cover.
1.2.4 Replacing the Alarm Board
If the alarm LEDs or other alarm functions are not
operating properly, the alarm circuit board may be
removed and replaced from the front of the fuse panel.
You do not need to remove power or otherwise take the
fuse panel or the equipment it is feeding out of service
to perform alarm board replacement.
Contact Amphenol Network Solutions for a
replacement alarm board. (See “1.4 Parts &
Accessories” on page 14.) When replacing an alarm
board, ensure that the keyed connector at the rear
wall of the panel mates properly with the new board.
1.3 Service
Plastic clips hold the
alarm board to the
front of the panel.
Figure 11 - Replacing the Alarm Board
WARNING! DISCONNECT ALL INPUTS BEFORE SERVICING THIS UNIT.
CAUTION! Only qualified technicians may install and maintain this product.
1.3.1 Owner Maintenance
High-Power GMT Fuse Panels do not require special preventive maintenance.
If you encounter technical difficulties, please use the online request form at
www.amphenol-ns.com under Support\Technical Support or call Amphenol Network Solutions
directly at 888.821.4856.
WARNING
!

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High-Power 20A GMT
Series Fuse Panels
1.3.2 In-Warranty Service
Contact Amphenol Network Solutions Quality at 509.926.6000 or e-mail us at [e-mail].
Amphenol Network Solutions will ship a new replacement product, along with a return shipping label and
authorization information. When you receive your replacement product, pack up the defective product and
return it to Amphenol Network Solutions using the return label, box and any additional information provided.
1.3.3 Out-Of-Warranty Service
Follow the In-Warranty directions above. Amphenol Network Solutions charges a processing fee for out-of-
warranty service, and you must submit a Purchase Order along with a Return Material Authorization (RMA)
before returning equipment. The processing fee guarantees a repair estimate and is credited against actual
material and labor costs. Call Amphenol Network Solutions Quality at 509.926.6000 for more information.
1.3.4 Repacking for Shipment
1. Tag the equipment showing owner’s name, address, and telephone number, together with a detailed
description of the problem.
2. Use the original shipping container if possible. If you do not have it, package the equipment in a way to
prevent shipping damage. Include the RMA inside the container and legibly print the RMA number on the
outside of the package, near the shipping address.
3. Insure the package.
1.4 Parts & Accessories
Table 2 - Alarm Boards
Item
Description
Part Number
Alarm Board for Dual Circuits
Standard
16188F01
Table 3 - GMT Fuses
GMT Fuse
Part Numbers GMT Fuse
Parts Numbers for Colored
Designation Pin
0.18A Yellow (YEL)
130781
102435-21
1
⁄
4
A Violet (VIO)
100151
102435-2
1⁄2A Red (RED) 004001 102435-5
3⁄4A Brown (BRN) 004008 102435-7

15
Amphenol Network Solutions
All rights reserved. 03.17.2020 130339-9 A0
509.926.6000 – amphenol-ns.com
High-Power 20A GMT
Series Fuse Panels
Table 3 - GMT Fuses
GMT Fuse
Part Numbers GMT Fuse
Parts Numbers for Colored
Designation Pin
1A Gray (GRY) 100991 102435-8
11/3A White (WHT)
004006
102435-9
11⁄2A White/Yellow (WHT/YEL)
004011
102435-10
2A Orange (ORN)
004002
102435-11
2.5A White/Orange (WHT/ORN)
130783
102435-12
3A Blue (BLU)
004012
102435-13
3.5A White/Blue (WHT/BLU) 130782 102435-14
4A White/Brown (WHT/BRN) 004013 102435-15
5A Green (GRN)
004014
102435-16
71⁄2A Black/White (BLK/WHT)
004010
102435-17
10A Red/White (RED/WHT)
004015
102435-18
12A Yellow/Green (YEL/GRN)
102287
102435-19
15A Red/Blue (RED/BLU) 102288 102435-20
20A White/Green (WHT/GRN) 127240RC 102435-22
Dummy Fuses
132748
GMT Safety Covers
116915
Medium-duty GMT fuse puller
06113-03
Table 4 - Dual-Hole Compression Lug Part Numbers vs. Input or Ground Wire Size For 1⁄4-in. Studs
on 5/8-in. Centers)
1/0 AWG
#1 AWG
#2 AWG
#4 AWG
#6 AWG
a
#8 AWG
T&B 54206
(Die Code 29)
54205
(Die Code 24)
54850BE
(Die Code 21)
BurndybYA25L2NT14E1
(Die Code 12)
YA1CL2NT14
(Die Code 11)
YA2CL2NT14
(Die Code 10)
YA4CL2TC14
(Die Code 8)
YA6CL2TC14
(Die Code 7)
YA8CL2TC14
(Die Code 9)
Panduit
LCDN2-14AQ
(Die Code 33)
LCD6-14A-L
(Die Code 24)
LCD8-14A-L
(Die Code 21)
a. #6 AWG lug can be used for dual-hole grounding as well.
b. Burndy lugs available in 45- and 90-degrees, will add degree suffix.
Example: 45 degree, YA2CL2NT14 = YA2CLNT1445

16
Amphenol Network Solutions
All rights reserved. 03.17.2020 130339-9 A0
509.926.6000 – amphenol-ns.com
High-Power 20A GMT
Series Fuse Panels
Table 5 - Single-Hole Ring Lug Part Numbers vs Output Wire Size (For #6 Panhead Screws)
#22 - 18 AWG
#22-16 AWG
#16 - 14 AWG
#12 - 10 AWG
AMP
51863
51863
320619
329697
Panduit
PN18-6R-M
PN14--6RN-M
1.5 Diagrams
1.5.1 Block Diagram
Figure 12 - Power, Battery Return and Fuse Circuit

17
Amphenol Network Solutions
All rights reserved. 03.17.2020 130339-9 A0
509.926.6000 – amphenol-ns.com
High-Power 20A GMT
Series Fuse Panels
Transparent C over
2.27 [57 .7 ]
P anel m ay be flush m ounted or
extended by up to 3 in .
(76 m m ) in 0 .5 in . (12 .7 m m )
increm ents.
9.63 [244 .5 ]
3.0000
0.12 [3 .0 ]
0.75 [18 .9 ]
1.5.2 1RU Dimensions
NO TE : Dim ensions are in in . [m m ].
10-32 P anhead S crew s are Included.
0.2
TO P VIEW
1.00 [25 .4 ]
w ww .telect.c om
1.25 [31 .7 ] 1.75 [44 .5 ]
17.00 [431 .8]
19.00 [482 .6]
23.00 [584 .2 ]
7 [6 .8 ]
0.33 [8 .5 ]
0.62 [15 .9 ]
0.62 [15 .8 ]
0.30 [7 .5 ]
1 4 - 20 S tuds & K EPS N uts
6-32 P anhead Screw s
R EAR VIEW
(R O TATED)
M ax. lug w idth is 0.54 in . (13 .7 m m )
M ax. lug w idth is 0.67 in . (17 .0 m m )