Vertiv NetSure 563171 User manual

NetSure™ -48 VDC
GMT Distribution Unit
Installation and User Manual
Specification Number: 563171

Vertiv™ NetSure™ -48 VDC GMT Distribution Unit Installation and User Manual
Vertiv™ NetSure™ -48 VDC GMT Distribution Unit Installation and User Manual
The information contained in this document is subject to change without
notice and may not be suitable for all applications. While every precaution has
been taken to ensure the accuracy and completeness of this document, Vertiv
assumes no responsibility and disclaims all liability for damages resulting from
use of this information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods, tools, and
materials to be used in performing procedures not specifically described in
this document.
The products covered by this instruction manual are manufactured and/or
sold by Vertiv. This document is the property of Vertiv and contains
confidential and proprietary information owned by Vertiv. Any copying, use or
disclosure of it without the written permission of Vertiv is strictly prohibited.
Names of companies and products are trademarks or registered trademarks of
the respective companies. Any questions regarding usage of trademark
names should be directed to the original manufacturer.
Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent section of this
manual to see if the issue can be resolved by following outlined procedures.
Visit https://www.vertiv.com/en-us/support/ for additional assistance.

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TABLE OF CONTENTS
Admonishments Used in this Document.............................................................................................................................iv
Important Safety Instructions..................................................................................................................................................v
Safety Admonishments Definitions ..........................................................................................................................................................................................................................v
Safety and Regulatory Statements...........................................................................................................................................................................................................................v
Déclarations de Sécurité et de Réglementation...........................................................................................................................................................................................v
1Description ................................................................................................................................................................................1
2Specifications...........................................................................................................................................................................1
2.1 Electrical.................................................................................................................................................................................................................................................................................1
2.2 Environmental..................................................................................................................................................................................................................................................................2
2.3 Compliance Information..........................................................................................................................................................................................................................................2
2.4 Dimensions and Weight..........................................................................................................................................................................................................................................2
3Accessories ..............................................................................................................................................................................3
3.1 Mounting Brackets and Adapters..................................................................................................................................................................................................................3
3.1.1 23” Mounting Bracket Adapter Plates, P/N 563148................................................................................................................................................3
3.1.2 23” Offset Mounting Bracket Adapter, P/N SXA2300278.................................................................................................................................3
3.1.3 Special 19” Mounting Brackets, P/N SXA2300282..................................................................................................................................................3
3.2 GMT Load Distribution Fuses ...........................................................................................................................................................................................................................3
3.3 Lugs ..................................................................................................................................................................................................................................................................................4
4Installing the Distribution Unit..........................................................................................................................................4
4.1 General ..................................................................................................................................................................................................................................................................................4
4.2 Securing the Distribution Unit to a Relay Rack or a Cabinet Equipment Rack (if required)..................................................................4
4.3 Installing Fuses................................................................................................................................................................................................................................................................6
5Making Electrical Connections .........................................................................................................................................7
5.1 Important Safety Instructions............................................................................................................................................................................................................................7
5.2 Wiring Considerations...............................................................................................................................................................................................................................................7
5.3 Relay Rack / Cabinet Frame Grounding Connection...................................................................................................................................................................7
5.4 Distribution Unit Frame Grounding Connection..............................................................................................................................................................................7
5.5 External Fuse Alarm Connections.................................................................................................................................................................................................................8
5.6 Load Distribution Wiring to GMT Fuse Blocks ..................................................................................................................................................................................8
5.7 Input Wiring ........................................................................................................................................................................................................................................................................9
6Initial Startup..........................................................................................................................................................................11
7Troubleshooting and Repair .............................................................................................................................................11
7.1 Contact Information..................................................................................................................................................................................................................................................11
7.2 Replacement Procedures.................................................................................................................................................................................................................................... 11
7.2.1 Replacing a Distribution Device..............................................................................................................................................................................................11

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iv
Admonishments Used in this Document
DANGER!
Warns of a hazard the reader will be exposed to that will likely result
in death or serious injury if not avoided. (ANSI, OSHA)
WARNING!
Warns of a potential hazard the reader may be exposed to that could
result in
death or serious injury if not avoided. This admonition is not used for situations that pose a
risk only to equipment, software, data, or service. (ANSI)
CAUTION!
Warns of a potential hazard the reader may be exposed to that could
result in minor or moderate injury if not avoided. (ANSI, OSHA) This admonition is not
used for situations that pose a risk only to equipment, data, or service, even if such use
appears to be permitted in some of the applicable standards. (OSHA)
ALERT!
Alerts the reader to an action that must be avoided in order to protect
equipment, software, data, or service. (ISO)
ALERT!
Alerts the reader to an action that must be performed in order to prevent
equipment damage, software corruption, data lo
ss, or service interruption. (ISO)
FIRE SAFETY!
Informs the reader of fire safety information, reminders, precautions,
or policies, or of the locations of fire
-fighting and fire-safety equipment. (ISO)
SAFETY!
Informs the reader of general safety information, reminders, precautions, or
policies not
related to a particular source of hazard or to fire safety. (ISO, ANSI, OSHA)

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v
Important Safety Instructions
Safety Admonishments Definitions
Definitions of the safety admonishments used in this document are listed under “Admonishments Used in this Document” on page iv.
Safety and Regulatory Statements
Refer to Section 4154 (provided with your customer documentation) for Safety and Regulatory Statements.
Déclarations de Sécurité et de Réglementation
Reportez-vous à la Section 4154 (fourni avec les documents de votre client) pour les déclarations de sécurité et de réglementation.

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1Description
A 1RU high by 19” wide distribution unit with thirty-six (36) GMT fuse load positions.
Provides…
•(36) GMT fuse load distribution positions (0 A to 15 A).
•Three (3) input connection points.
•CBA/FA alarm relay contacts and resistive battery for connection to external alarms.
2Specifications
2.1 Electrical
1. Input / Output Voltage: Nominal –48 VDC.
2. Maximum Input Current: 150 A.
3. Maximum Load Distribution Current: 150 A at @ +40 °C (+104 °F) and 80 A @ +65 °C (+149 °F).
4. Maximum GMT Fuse Block Capacity:35 A @ +40 °C (+104 °F) and 30 A @ +65 °C (+149 °F).
5. Maximum GMT Fuse Size: 15 A.
6. Circuit Breaker / Fuse Alarm Circuit: A set of Form-C alarm relay contacts and resistive battery are provided for connection
to external CBA/FA alarms. Relay contacts rated for 2 A @ 30 VDC, 0.6 A @ 110 VDC, and 0.6A @ 125 VAC.

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2.2 Environmental
1. Operating Ambient Temperature Range: -40 °C to +65 °C (-40 °F to +149 °F).
2. Storage Ambient Temperature Range: -40 °C to +70 °C (-40 °F to +158 °F).
3. Relative Humidity: Capable of operating in an ambient relative humidity range of 0% to 95%, non-condensing.
4. Altitude: Capable of operating in an altitude range of -200 feet to 10,000 feet. The maximum operating ambient temperature
should be de-rated by 3 °C per 1000 feet above 6562 feet.
2.3 Compliance Information
1. Safety Compliance: This panel is UL Recognized for use in DC Power Distribution Centers for Communications Equipment.
2. NEBS Compliance: Compliance verified by a Nationally Recognized Testing Laboratory (NRTL) per GR-1089-CORE and GR-
63-CORE. Contact Vertiv for NEBS compliance reports.
3. GR-3108: GR-3108 Class 2 Compliant.
2.4 Dimensions and Weight
See Figure 2.1.
Figure 2.1 Dimensions and Weight
12.6
Front View
19” to 23” Mounting Bracket Adapters
Offset 23” Mounting Angle
Rear View
Top View
Right Side ViewLeft Side View
1.4
1.25
1.25
1.25
22.3
23.0
17.6
18.3
19.0
22.3
23.0
Notes:
1. Dimensions are in inches,
unless otherwise specified.
2. Finish: Galvanized Steel.
3. Weight:
Net: 13.5 lbs.
4. 19” to 23” mounting bracket
adapters can be attached to the
standard 19” mounting brackets.
5. An offset 23” mounting angle can
be attached to the left side of the
shelf (replaces the standard
mounting angle for that side).
6. Standard 19” mounting angles can
be adjusted for 1.4” or 5” front
projection mounting.

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3Accessories
Order the following by part number as required.
3.1 Mounting Brackets and Adapters
3.1.1 23” Mounting Bracket Adapter Plates, P/N 563148
Attaches to the 19” standard mounting brackets to allow 23” mounting.
P/N 563148 provides two (2) mounting bracket adapter plates. Order as required.
3.1.2 23” Offset Mounting Bracket Adapter, P/N SXA2300278
Replaces the 19” standard mounting bracket on the left side of the shelf to allow 23” offset mounting.
Provided with the distribution unit.
3.1.3 Special 19” Mounting Brackets, P/N SXA2300282
Replaces the 19” standard mounting brackets to allow the side access holes in the shelf to be used with
other equipment. There will be a 5” front projection mounting when this bracket is used.
Provided with the distribution unit.
3.2 GMT Load Distribution Fuses
The distribution unit holds up to thirty-six (36) GMT load distribution fuses.
Order GMT fuses as required per Table 3.1.
Table 3.1 GMT Fuses
Ampere Rating Part Number Fuse Color
18/100 (GMT-A) 248610301 --
1/4 248610200 Violet
1/2 248610300 Red
3/4 248610500 Brown
1-1/3 248610700 White
2 248610800 Orange
3 248610900 Blue
5 248611000 Green
7-1/2 248611300 Black-White
10 248611200 Red-White
15 248611500 Red-Blue
Replacement Safety Fuse
Cover (GMT-Y) 102774 --
Replacement Dummy Fuse 248872600 --
23” Mounting
Bracket Adapters
P/N 563148
23” Offset Mounting
Bracket Adapter
P/N SXA2300278
(one required)
Special 19”
Mounting Bracket
P/N SXA2300282
(two required)

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3.3 Lugs
Standard Crimp Lugs
For use on the rear input busbars.
Specify part number from Table 3.2 for desired lead size.
Maximum lug size for rear input landing point connections is 1/0 AWG flex wire lug P/N 112902.
Table 3.2 Crimp Lug, Two-Hole, 1/4” Bolt Clearance Hole, 5/8” Centers
Lead Size Part Number
14-10 AWG 245342300
8 AWG 245390200
6 AWG 245346700
4 AWG 245346800
2 AWG 245346900
1/0 AWG
112902
(Narrow Tongue)
(Flex Wire)
Note: Lugs should be crimped per lug manufacturer’s specifications.
4Installing the Distribution Unit
4.1 General
This product is intended for installation in network telecommunication facilities (CO, vault, hut, or other environmentally controlled
electronic equipment enclosure).
This product is intended to be connected to the common bonding network in a network telecommunication facility (CO, vault, hut, or
other environmentally controlled electronic equipment enclosure).
4.2 Securing the Distribution Unit to a Relay Rack or a Cabinet Equipment
Rack (if required)
DANGER! If the distribution unit is mounted in a relay rack, the relay rack must be securely anchored to the floor before the
distribution unit is installed.
The distribution unit is designed to mount in a standard 19” relay rack or equipment rack having 1” or 1-3/4” multiple drillings.
•Two 19” mounting brackets are furnished (adjustable for 1.4” or 5” front projection mounting).
•A special 19” mounting bracket is available (2 required) to allow the side access holes in the shelf to be used with other
equipment. There will be a 5” front projection mounting when this bracket is used.
•A 23” offset mounting bracket adapter is furnished.
•23” mounting bracket adapter plates are available.
Refer to Figure 2.1 on page 2 for overall dimensions.

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Procedure
1. For 23” mounting, attach the 23” mounting bracket adapter plates to the standard 19” mounting brackets or use the provided
23” offset mounting bracket.
2. Position the distribution unit in the relay rack or cabinet equipment rack.
3. Secure the distribution unit to the relay rack or cabinet equipment rack using hardware as shown in Figure 4.1 (see Figure
4.1 for recommended torque). Use grounding washers as indicated in Figure 4.1.
NOTE! Install (orient) the ground washers so the teeth dig into the mounting angles for a secure ground connection.
NOTE! Compliance with Telcordia GR-1089-CORE requires that prior to mounting the system to the equipment rack:
•All paint must be removed from the front surface of each equipment rack rail where it mates with a shelf-mounting
bracket, so that good metal-to-metal contact can be established between the shelf and rack.
•The shelf-to-rack mating surfaces must be cleaned.
•Electrical anti-oxidizing compound must be applied to the shelf-to-rack mating surfaces.
Figure 4.1 Mounting the Distribution Unit in a Relay Rack or a Cabinet Equipment Rack
MOUNTING HARDWARE
12-24 x 3/4" Thread Forming
Hex Head Screw
No. 10/12 Ground Washer
Torque: 65 in-lbs.
Front

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4.3 Installing Fuses
Refer to “Specifications” on page 1 for any temperature, sizing, and spacing restrictions.
GMT Load Distribution Fuses
Procedure
1. Install correctly sized GMT fuses into the fuseholders located on the front of the distribution unit, as required. If a dummy
fuse is installed, first remove the dummy fuse. Install a safety fuse cover over each GMT fuse. Install a dummy fuse in all
unused fuse positions. See Figure 4.2.
Figure 4.2 Installing GMT Load Distribution Fuses
GMT Fuse
GMT Fuse
GMT Fuse
Safety Cover
Safety Cover
Safety Cover
Front

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5Making Electrical Connections
5.1 Important Safety Instructions
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
WARNING! When this panel is used in non-factory integrated systems, external branch circuit protection is required for all
input feeds.
5.2 Wiring Considerations
All wiring, branch circuit protection, and grounding should follow the current edition of the American National Standards Institute
(ANSI) approved National Fire Protection Association's (NFPA) National Electrical Code (NEC), and applicable local codes. For
operation in countries where the NEC is not recognized, follow applicable codes.
5.3 Relay Rack / Cabinet Frame Grounding Connection
NOTE! This applies to the relay rack or cabinet equipment rack the distribution unit is installed in.
For relay rack / cabinet frame grounding requirements, refer to the current edition of the American National Standards Institute
(ANSI) approved National Fire Protection Association's (NFPA) National Electrical Code (NEC), applicable local codes, and your
specific site requirements.
5.4 Distribution Unit Frame Grounding Connection
For distribution unit frame grounding requirements, refer to the current edition of the American National Standards Institute (ANSI)
approved National Fire Protection Association's (NFPA) National Electrical Code (NEC), applicable local codes, and your specific site
requirements.
Procedure
1. The frame grounding connection to the distribution unit is made by using grounding washers with the mounting hardware
used to secure the distribution unit to the relay rack or cabinet. Refer to “Securing the Distribution Unit to a Relay Rack or a
Cabinet Equipment Rack” on page 4. Ensure that the relay rack or cabinet is properly grounded.
NOTE! An M4 frame ground stud is located on the rear of the distribution unit. Provide a grounding lead to this connection
point, if required. Refer to
Figure 5.1 for location.
Figure 5.1 Distribution Unit Frame Grounding Connection Points
M4 Shelf Frame
Ground Stud
Rear
(rear cover removed
for clarity only)

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5.5 External Fuse Alarm Connections
External fuse alarm wiring is made to terminal block J3 located on alarm circuit card P/N 541183. Refer to Figure 5.2 for location.
Terminal block J3 accepts a wire size in the range of 26 AWG to 14 AWG. Recommended torque is 0.5 Nm to 0.6 Nm.
•If a fuse in the distribution unit opens, relay contacts open between terminals 2 and 3 of J3 and relay contacts close between
terminals 3 and 4 of J3. Normal operation provides close relay contacts between terminals 2 and 3 of J3 and open relay
contacts between terminals 3 and 4 of J3.
•If a fuse in the distribution unit opens, -48 VDC is provided at terminal 1 of J3.
Figure 5.2 External Circuit Breaker / Fuse Alarm Connections
5.6 Load Distribution Wiring to GMT Fuse Blocks
WARNING! Observe proper polarity when making load connections.
NOTE! When used for power distribution, load should not exceed 80% of device rating, except 10 A and 15 A fuses, for which
load should not exceed 70% of device rating.
Load and load return leads are connected to screw-type terminal blocks located on the front of the distribution unit (refer to Figure
5.3). Refer to Figure 5.3 also for terminal block wire size capacity and recommended torque.
The rating of the distribution device determines the wire size requirements. Refer to the American National Standards Institute
(ANSI) approved National Fire Protection Association's (NFPA) National Electrical Code (NEC) and applicable local codes.
FA
NC
COM
NO
J3
1234
Circuit Breaker Alarm /
Fuse Alarm Circuit Card
Relay shown in the deenergized state.
Relay is normally deenergized and energizes during an alarm condition.
Rear
(rear cover removed
for clarity only)

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5.7 Input Wiring
WARNING! Observe proper polarity when making input connections.
Input source and input return leads terminated in two-hole lugs are connected to threaded studs located on the rear inside of the
distribution unit (refer to Figure 5.3). Refer to Figure 5.3 also for stud size/spacing and recommended torque.
Input wire size and lug requirements vary depending on power requirements, therefore no specific information is provided for wire
size. Refer to Table 5.1 for recommended wire sizes and lugs at rated maximum assembly load and other various loads. Note that
loads typically should not exceed 80% of capacity; therefore, input wires have been sized for an overcurrent protection device rated at
125% of the expected load. All lugs for customer connections must be ordered separately. See Table 5.1 for available lugs.
NOTE! The DC return connection to this system can remain isolated from system frame and chassis (DC-I).
Using Side Access Holes
Optional 19” mounting brackets P/N SXA2300282 can be installed to allow wiring through the side access holes in the shelf. Requires
5” front projection mounting.
Procedure
1. Install mounting brackets P/N SXA2300282.
2. Remove the top cover.
3. Select which side of shelf you want to bring the wires in from. Install supplied bushing into the access hole on this side.
Install plug into the access hole on the other side. Refer to Figure 5.3.
4. Run customer supplied wires from RTN and -48 VDC studs in the shelf through the access hole to the appropriate external
terminations.
5. Replace the top.
6. Wire the shelf’s FA termination to the external alarm circuits as required.
Table 5.1 Recommended Input External Branch Circuit Protection, Wire Sizes, and Lug
External Overcurrent Protection
Device Rating
Ambient
Operating
Temperature (1)
Loop
Length (Ft)
1.0 Voltage
Drop (2)
Recm 90°C
Wire Size
(AWG) (1)
Recommended
Crimp Lug (3)
150 A 40°C 63 1/0 112902
125 A 40°C 76 1/0 112902
100 A 40°C 59 2 245346900
1Wire sizes based on recommendations of the American National Standards Institute (ANSI) approved National Fire
Protection Association's (NFPA) National Electrical Code (NEC). Table 310.15 (B) (16) for copper wire at 90 °C
conductor temperature. For operation in countries where the NEC is not recognized, follow applicable codes.
2Recommended wire sizes are sufficient to restrict maximum voltage drop to 1.0 volt at rated full load output current
of the shelf for the loop lengths shown in this column. Loop length is the sum of the lengths of the positive and
negative leads.
3These lugs are two-hole for 1/4” bolt clearance on 5/8” centers. Lugs should be crimped per lug manufacturer’s
specifications.

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Figure 5.3 Load Distribution Wiring and Input Wiring
Input Source, Input Return:
1/4-20 studs on 5/8” centers for
installation of customer provided
two-hole lugs.
Maximum Lug Width: 0.84 inches.
Hardware:
1/4-20 Hex Nut
1/4" Lock Washer
1/4" Flat Washer
Torque to 58 in-lbs.
Front
Load Return Leads -48V Load Leads
-48 VDC Load Terminal Blocks:
Wire Size Capacity:
22 AWG to 12 AWG.
Recommended Torque:
4.4 in-lbs.
Load Return Leads -48V Load Leads Load Return Leads -48V Load Leads Load Return Leads -48V Load Leads
Load Return Leads -48V Load Leads Load Return Leads -48V Load Leads
Observe proper polarity
when making battery
and load connections.
WARNING!
Rear
(top and rear covers removed)
Side wiring access holes (1 each
side). Accessed by installing
optional 19” mounting brackets
P/N SXA2300282. Requires 5”
front projection mounting. Also
install supplied bushing into the
access hole on side being used.
Install plug into the access hole
on the other side.
-48 VDC SUPPLY
GND RTN
Input Return Bus
Input Bus
Rear
(rear cover removed
for clarity only)

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6Initial Startup
Procedure
1. Apply input power to the distribution unit.
7Troubleshooting and Repair
7.1 Contact Information
Refer to Section 4154 (provided with your customer documentation) for support contact information.
7.2 Replacement Procedures
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
7.2.1 Replacing a Distribution Device
Replace distribution devices with the same type and rating.
Replacing a GMT Distribution Fuse
Procedure
1. Refer to Figure 4.2 and replace the fuse. Ensure a safety fuse cover is installed on the replacement fuse, as shown in Figure
7.1.
2. Verify no alarms are active.
Figure 7.1 Installation of Safety Fuse Covers
Safety Cover
P/N 248898700
(GMT-X)
Safety Cover
P/N 102774
(GMT-Y)

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