LumaSense SmartDGA User manual

HARDWARE MANUAL
SmartDGA®

Confidential Information
The material contained herein consists of information that is the property of LumaSense
Technologies, an Advanced Energy Company, and intended solely for use by the purchaser of the
equipment described in this manual.
All specifications are subject to change without notice. Changes are made periodically to the
information in this publication, and these changes will be incorporated in new editions.
LumaSense Technologies prohibits the duplication of any portion of this manual or the use thereof
for any purpose other than the operation or maintenance of the equipment described in this
manual, without the express written permission of LumaSense Technologies or Advanced Energy
Industries, Inc. Any unauthorized use of this manual or its contents is strictly prohibited.
Copyright
© 2018 LumaSense Technologies, Inc. All rights reserved. LumaSense Technologies, Inc. is a
subsidiary of Advanced Energy Industries, Inc.
Trademarks
SmartDGA, SmartDGA Guide, SmartDGA Gauge, SmartDGA Guard, SmartDGA EZHub, LumaSMART
iCore, DGA Viewer, and LumaSMART are trademarks of LumaSense Technologies, Inc. All other
trademarks are trademarks, registered trademarks, and/or service marks of their respective holders.
Service Centers
LumaSense Technologies, Inc.
North America
Sales & Service
Santa Clara, CA, USA
Ph: [phone]
Ph: [phone]
Fax: [phone]
LumaSense Technologies GmbH
Other Than North America
Sales & Support
Frankfurt, Germany
Ph: [phone]
Fax: [phone]
Global and Regional Centers
Our Headquarters
LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]
Americas, Australia, & Other Asia
LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]
Europe, Middle East, Africa
LumaSense Technologies GmbH
Frankfurt, Germany
Ph: [phone]
Fax: [phone]
France
LumaSense Technologies Sarl
Erstein, France
Ph: [phone]
Fax: [phone]
India
LumaSense Technologies, India
Mumbai, India
Ph: + 91 22 67419203
Fax: + 91 22 67419201
China
LumaSense Technologies, China
Shanghai, China
Ph: [phone]
Ph: [phone]
E-mail [e-mail]
[e-mail]
[e-mail]
Website http://www.LumaSenseInc.com
Part No 515-0009-01 EN
Revision J
November 2018

SmartDGA Hardware Manual Contents •iii
Contents
1General ............................................................................................................................... 7
1.1 Information about this Manual .............................................................................. 7
1.2 Conventions .............................................................................................................. 7
1.3 System Requirements .............................................................................................. 7
1.4 Limit of Liability and Warranty............................................................................... 8
1.5 Malfunction or Service Request .............................................................................. 8
1.6 Shipments to LumaSense for Repair ...................................................................... 8
1.7 Disposal and Decommissioning .............................................................................. 9
2System Overview ............................................................................................................ 11
2.1 System Components............................................................................................... 12
2.1.1 SmartDGA®Instruments ........................................................................................12
2.1.2 SmartDGA EZHubTM Unit .......................................................................................13
2.1.3 LumaSMART iCoreTM Controller (Optional)..........................................................14
2.2 Theory of Operation ............................................................................................... 14
2.2.1 Non-Dispersive Infrared (NDIR) Theory ................................................................14
2.2.2 Other Gas Measurements......................................................................................15
2.2.3 Sampling Sequence................................................................................................15
2.2.4 Oil-Gas Separating Membrane .............................................................................16
3Pre-Installation Verification........................................................................................... 17
3.1 Unpacking and Verifying Contents....................................................................... 17
3.2 Confirming Installation Locations ........................................................................ 17
3.2.1 Confirm Mounting for SmartDGA Instrument.....................................................17
3.2.2 Confirm Valve Kit...................................................................................................18
3.2.3 Confirm Mounting/Location for EZHub ...............................................................20
3.2.4 Confirm EZHub Mounting.....................................................................................21
3.2.5 Confirm Mounting Location/Type for External Computer or LumaSMART iCore
(Optional).............................................................................................................................21
3.3 Verify Power and Communications ...................................................................... 23
3.3.1 Verify Power Supply ..............................................................................................23
3.3.2 Verify Communications .........................................................................................23
4Valve Installation ............................................................................................................ 25
4.1 Single Valve (VA-1) ................................................................................................. 26
4.1.1 VA-1 Parts and Tools..............................................................................................26

SmartDGA Hardware Manual Contents •iv
4.1.2 VA-1 Installation ....................................................................................................27
4.2 Dual Valve (VA-2).................................................................................................... 35
4.2.1 VA-2 Parts and Tools..............................................................................................35
4.2.2 VA-2 Installation ....................................................................................................36
4.3 Inline (Off-Transformer) Mounting (VA-0) ........................................................... 40
4.3.1 VA-0 Parts and Tools..............................................................................................41
4.3.2 VA-0 Installation ....................................................................................................42
5SmartDGA System Installation...................................................................................... 49
5.1 SmartDGA Instrument............................................................................................ 49
5.1.1Parts and Tools for the SmartDGA Instrument....................................................49
5.1.2 Mounting the SmartDGA Instrument...................................................................49
5.2 EZHub ....................................................................................................................... 50
5.2.1 Parts and Tools for the EZHub ..............................................................................50
5.2.2 Mounting the EZHub.............................................................................................52
5.2.3 Connecting the EZHub ..........................................................................................54
5.3iCore or External Computer................................................................................... 59
5.3.1 Parts and Tools for the iCore ................................................................................59
5.3.2 Mounting the iCore ...............................................................................................60
5.3.3Connecting the iCore.............................................................................................63
6SmartDGA Commissioning............................................................................................. 67
6.1 Installing the DGA Commissioning Tool .............................................................. 67
6.2 Connecting the SmartDGA System....................................................................... 70
6.3 Using the Commissioning Tool.............................................................................. 71
6.3.1 Setup.......................................................................................................................71
6.3.2 Preparation ............................................................................................................75
6.3.3 Pump Setup ............................................................................................................77
6.3.4 Priming ...................................................................................................................78
6.3.5 Final Test.................................................................................................................78
7Maintenance .................................................................................................................... 81
7.1 Field Replaceable Unit (FRU) List........................................................................... 81
7.2 Battery Replacement .............................................................................................. 81
7.2.1 Replacing the EZHub Battery................................................................................81
7.2.2 Replacing the LumaSMART iCoreTM Battery.........................................................84
7.3 Sensor Replacement ............................................................................................... 86
7.3.1 Replacing the H2Sensor ........................................................................................87
7.3.2 Replacing the O2Sensor ........................................................................................88

SmartDGA Hardware Manual Contents •v
8Troubleshooting .............................................................................................................. 91
8.1 Visual Light Indicators ........................................................................................... 91
8.1.1 SmartDGA®Instrument .........................................................................................91
8.1.2 SmartDGA EZHubTM Controller .............................................................................92
9Diagrams & Drawings..................................................................................................... 95
9.1 Multiple SmartDGA EZHubTM Setup with Ethernet Hub or Switch .................... 95
9.2 LumaSMART iCoreTM RS485 Connections.............................................................. 96
9.3 LumaSMART iCoreTM Ethernet Connections ......................................................... 97
9.4 Unistrut Stand ......................................................................................................... 98
9.5 SmartDGA NEMA 4 Enclosure................................................................................ 99
9.6 Inline Mounting Plate........................................................................................... 100
9.7 Wiring Connection ................................................................................................ 101
9.8 Assy, Wall Mount, SmartDGA EZHubTM ............................................................... 102
9.9 Assy, Panel Mount, SmartDGA EZHubTM ............................................................. 104
9.10 Assy, Wall Mount, LumaSMART iCoreTM ............................................................. 106
9.11 Assy, Panel Mount, LumaSMART iCoreTM ........................................................... 108
9.12 SmartDGA Instrument Sun Shade....................................................................... 110
9.13 SmartDGA Instrument Dimensions .................................................................... 112
Index ..................................................................................................................................... 113

SmartDGA Hardware Manual Contents •vi
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SmartDGA Hardware Manual General •7
1General
1.1 Information about this Manual
Congratulations on choosing this high quality and highly efficient SmartDGA®system.
This manual provides important information about the system and can be used as a work of
reference for installing, operating, and maintaining the SmartDGA system. It is important that you
carefully read the information contained in this manual and follow all safety procedures before
installing or operating the instrument.
This manual assumes you have a working knowledge of the Windows™ Operating System and its
conventions; including how to use a mouse, standard menus and commands, and how to open,
save, and close files. For help with any of these functions, refer to the documentation that came
with your computer.
1.2 Conventions
•Section headings appear in large Frutiger type.
•Instruction sets appear with Bold headings.
•Menu, display, and keyboard options appear in Bold Title Case. (i.e., File, Open, etc.)
Note: Indicates tips and useful information in this manual. All notes should be read to
effectively operate the instrument.
Caution: Denotes information critical to avoiding instrument damage or a severe impact
to processing. When this symbol is found on the instrument it indicates a
potential hazard. Consult the documentation before proceeding with any
actions.
Warning: Denotes information critical to avoiding personal injury, such as when an
electrical hazard is present. When this symbol is found on the instrument it
indicates a potential hazard. Consult the documentation before proceeding with
any actions.
1.3 System Requirements
To operate the SmartDGA instruments you will need to use the DGA ViewerTM software, which
requires either a PC or an iCoreTM controller installed and connected through Ethernet or RS485 to
the EZHub device. If using a PC to operate the DGA Viewer software, ensure it is a Windows-based
computer with the following (minimum) components:
•Processor: 1 GhZ, 32-bit or 64-bit
•Operating System: Windows XP Embedded, Windows Server 2003, Windows 7, Windows 8,
and Windows Server 2008
•Hard Disk Memory: 100 MB for installation files, 10 MB for normal use
•System Memory: 512 MB or more
•Microsoft®.NET Framework

SmartDGA Hardware Manual General •8
1.4 Limit of Liability and Warranty
All general information and notes for handling, maintaining, and cleaning of the instruments are
offered according to the best of our knowledge and experience.
LumaSense Technologies is not liable for any damages that arise from the use of any examples or
processes mentioned in this manual or in case the content of this document should be incomplete
or incorrect. LumaSense Technologies reserves the right to revise this document and to make
changes from time to time in the content hereof without obligation to notify any person or persons
of such revisions or changes.
All SmartDGA systems from LumaSense Technologies have a regionally effective warranty period.
Please check our website at http://info.LumaSenseinc.com/warranty for up-to-date warranty
information. This warranty covers manufacturing defects and faults which arise during operation,
only if they are the result of defects caused by LumaSense Technologies.
A SmartDGA system has only three user-serviceable components: the battery, hydrogen (H2) sensor,
and oxygen (O2) sensor. The warranty is VOID if the instrument is otherwise disassembled, tampered
with, altered, or otherwise damaged without prior written consent from LumaSense Technologies;
or, if considered by LumaSense Technologies, to be abused or used in abnormal conditions.
1.5 Malfunction or Service Request
Contact LumaSense Technologies Technical Support in case of a malfunction or service request.
Provide clearly stated details of the problem as well as the instrument model number and serial
number. Upon receipt of this information, Technical Support will attempt to locate the fault and, if
possible, solve the problem over the telephone.
If Technical Support concludes that the instrument must be returned to LumaSense Technologies for
repair, they will issue a Return Material Authorization (RMA) number.
Return the instrument upon receipt of the RMA number, transportation prepaid. Clearly indicate
the assigned RMA number on the shipping package exterior. Refer to Section 1.6, Shipments to
LumaSense for Repair, for shipping instructions.
Technical Support can be contacted by telephone or email:
Santa Clara, California
Telephone: [phone]
[phone]
Email: [e-mail]
Frankfurt, Germany
Telephone: [phone]
Email: [e-mail]
1.6 Shipments to LumaSense for Repair
All RMA shipments of LumaSense Technologies instruments are to be prepaid and insured by way of
preferred carrier. For overseas customers, ship units air-freight, priority one.
The instrument must be shipped in the original packing container or its equivalent. LumaSense
Technologies is not responsible for freight damage to instruments that are improperly packed.
Clearly indicate the assigned RMA number on the shipping package exterior. If no RMA is indicated,
shipment will not be accepted.

SmartDGA Hardware Manual General •9
Send RMA Shipments to your nearest technical service center:
Santa Clara, California
LumaSense Technologies, Inc.
3301 Leonard Court
Santa Clara, CA 95054 USA
Telephone: [phone]
[phone]
Email: [e-mail]
Frankfurt, Germany
LumaSense Technologies GmbH
Kleyerstr. 90
60326 Frankfurt, Germany
Telephone: [phone]
Email: [e-mail]
1.7 Disposal and Decommissioning
Inoperable instruments must be disposed of in compliance with local regulations for electronic
materials. Sensors must be disposed of in compliance with local regulations.

SmartDGA Hardware Manual General •10
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SmartDGA Hardware Manual System Overview •11
2System Overview
The LumaSense SmartDGA®system was
designed with the environmental
conditions of a transformer substation in
mind and utilizes a specially constructed
Non-Dispersive Infrared Sensor (NDIR)
detection system to measure fault gases.
LumaSense offers three SmartDGA
Instrument models: Gauge, Guard, and
Guide.
A SmartDGA system includes the instrument
itself (Gauge, Guard, or Guide), necessary
mounting hardware for a transformer
single or dual valve mounting or an inline
adapter mounting which can be applied to
a transformer or a LTC filtering system,
power and/ or + I/O connection cable to an
EZHub device, and an optional LumaSMART
iCore which contains the SmartDGA Viewer
software. Installations can be accomplished
within hours (less than 4 hours in most
cases) and requires no carrier gases,
consumables, or scheduled calibration.
The SmartDGA EZHub has a battery backed-
up Real-Time-Clock-Calendar (RTC). The RTC allows the EZHub to be programmed to report
measurements at a selectable rate. The first measurement cycle can be programmed to start at a
specific time of day. The rates that can be programmed are: 3 hours, 6 hours, 9 hours, 12 hours, 24
hours, 48 hours, and weekly.
When a measurement cycle starts, the LumaSense SmartDGA®instrument flushes the old oil within
it and returns it to the transformer and/or LTC. The instrument then pulls a fresh oil sample to run
the measurement cycle and uses a membrane gas separator to extract a sample of the dissolved
gases from the transformer oil. The instrument measures the dissolved gases using an NDIR gas
sensor. After the NDIR measurement, the gas sample is sent past the oxygen and hydrogen sensors
to determine those gas concentrations. Oxygen and hydrogen cannot be measured by (non-
dispersive) infrared spectroscopy, but instead are measured using sensors which consume oxygen
and hydrogen, which is why it is done as a single step at the end. The instrument also performs a
background gas measurement which serves as a reference measurement. The SmartDGA system
collects the results of each gas analysis cycle and stores the data in memory within the SmartDGA
EZHub controller.
At the end of each measurement cycle, the EZHub stores the results on the internal memory and
sends them to the DGA Viewer software. The EZHub can also be configured to give an indication of
the fault condition in the oil by comparing the gas results to programmable thresholds for the gases
in level, rate, and ratio. The indications and conditions are:
GREEN
Normal
YELLOW
Caution
BLUE
Warning
RED
Alarm

SmartDGA Hardware Manual System Overview •12
The SmartDGA Viewer software enables the user to configure the SmartDGA instrument and
EZHub. The software can be installed on a Windows based PC or on the optional LumaSmart iCore
device. The software also displays results and other data from the EZHub and SmartDGA instrument.
This allows the user to track the dissolved gas as parts per million (ppm) levels over time and
monitor gas levels against user defined warning, caution, and alarm settings. As an option, a
LumaSMART iCore device is available to allow local display of DGA values and provide data to
external SCADA systems via DNP3, Modbus, and IEC61850 protocols.
2.1 System Components
A SmartDGA system typically consists of:
•SmartDGA instrument(s) with valve mounting kit(s) (VA-0, VA-1, or VA-2)
•EZHub(s) with connection cable(s)
•iCore (optional) or PC with DGA Commissioning Tool and DGA Viewer software
2.1.1 SmartDGA®Instruments
The SmartDGA family of instruments is the industry’s most cost effective
Dissolved Gas Analysis (DGA) solution, designed to be the most flexible and to
provide the best user experience available. Each model has been designed using
Non-Dispersive Infrared (NDIR) technology, which LumaSense Technologies
incorporated in over 400,000 instruments spanning the last 45 years.
The SmartDGA suite of products is designed to continuously monitor the
condition of electrical transformers and Load Tap Changers (LTC). The
SmartDGA instrument provides DGA values in order to develop a comprehensive
analysis of potential fault conditions through specific key gases being
monitored.
Installations are accomplished within hours (less than 4 hours in most cases) and require no carrier
gases, consumables, or scheduled calibration. The resulting online DGA information is made
available with user friendly software that allows convenient viewing of all measured and recorded
information. The ability to trigger corrective actions is provided by user programmable alarms for
individual gases plus real time indicators that are sunlight visible.
•The SmartDGA Gauge™ is the industry's first dedicated online Load Tap Changer (LTC)
condition monitor. The Gauge measures and records acetylene, methane, and ethylene plus
moisture to assess LTC health.
•The SmartDGA Guard™ measures and reports four (4) critical gases that results in a cost
effective reliable early warning online monitoring system to prevent transformer failures.
The Guard measures and records hydrogen, acetylene, carbon dioxide, and carbon
monoxide plus moisture to provide an early warning diagnostic tool. Each gas indicates that
a specific potential failure type could be pending, hydrogen indicates that a potential fault
is pending, acetylene indicates that there has been arcing or sparking within the
transformer, and a carbon dioxide/monoxide ratio is an indicator that there is a potential
failure or fault associated with the insulation within the transformer.
•The SmartDGA Guide™ measures and reports nine (9) DGA gases plus moisture and vastly
reduces total cost of ownership due to its differentiated design and installation scheme. The
Guide provides comprehensive online DGA results that enable diagnostic techniques that
are essential in protecting critical assets and helping to prevent unplanned outages. The
DGA values and diagnostics are available via user friendly software that allows complete
access to all measured and recorded values.

SmartDGA Hardware Manual System Overview •13
2.1.2 SmartDGA EZHubTM Unit
Note: The EZHub pictured above is configured for both an LTC (Gauge) and Transformer
(Guide/Guard). Your EZHub may only be configured with an LTC or a transformer side,
depending on your setup.
The SmartDGA EZHub unit is the central node for the SmartDGA system. A fully configured EZHub is
capable of handling the power and communication needs of a pair of SmartDGA instruments, either
one Guard or one Guide in combination with an individual LTC (Gauge) simultaneously. All
interface functions and interconnects are provided in the EZHub unit as well as internal memory
and four (4) relays and bright LED indicators for Caution, Warning, and Alarm conditions. The
fourth relay is a system status relay to notify of a SmartDGA system failure or abnormality as
measured by several components internal to the instrument and EZHub. The SmartDGA instrument
collects DGA gas level data and stores it in the EZHub. The data can be transferred (via RS485 or
Ethernet connections) from the EZHub and displayed on the DGA Viewer software running on a
computer or on an iCore controller. In addition, each EZHub provides a USB interface for fast data
downloading or firmware uploading.
Transformer
Power
RS485
Transformer
Ethernet
Light
Indicators
Relay
Connections
RS485
OUT
USB
LTC
Power
RS485
LTC
Light
Indicators
Relay
Connections

SmartDGA Hardware Manual System Overview •14
2.1.3 LumaSMART iCoreTM Controller (Optional)
The LumaSMART iCore controller provides a local interactive touch screen display of DGA data
collected from the SmartDGA system and EZHub using the SmartDGA Viewer software. This
software allows you to set-up your system, create alarm conditions and notifications, and view data
collected by the SmartDGA instrument(s). The controller has its own battery backed-up Real-Time-
Clock-Calendar. The iCore stores up to 40+ years of date and time stamped memory storage when
connected to external power.
Additionally, the iCore controller provides advanced communications to external systems using
standard communications connections. Each iCore controller enables connectivity to multiple EZHub
units (up to a maximum of 4).
Note: The LumaSMART iCoreTM is not required to operate the SmartDGA system.
2.2 Theory of Operation
With traditional technologies, widespread condition monitoring of transformers has been
unattainable, mostly due to high costs and excessive installation times. LumaSense is the industry
leader in the use of Non-Dispersive Infrared (NDIR) technologies and has redefined the way gases
are measured. The following sections provide a brief overview of the technology behind our
products that makes widespread condition monitoring of transformers possible.
2.2.1 Non-Dispersive Infrared (NDIR) Theory
The SmartDGA instrument utilizes Non-Dispersive
Infrared (NDIR) absorption to measure the partial
pressure of the gases: Acetylene (C2H2), Ethylene
(C2H4), Methane (CH4), Ethane (C2H6), Carbon
Monoxide (CO) and Carbon Dioxide (CO2). The NDIR
measurement is based on Infrared (IR) Absorption. The
light from a black body emitter is directed at a gas
sample. The light that passes through the gas sample is
then incident on a narrow band IR filter and detector.
There is an IR filter/detector pair for each gas to be measured. The detectors in the SmartDGA
instrument are thermopiles. The filters are each designed to be band pass filters with the band
being at a wavelength the gas of interest absorbs. The amount of that wavelength absorbed is
Front View
Bottom View
5.7-inch
Interactive
Touch Screen
USB
Power Indicator
Unused
Connection
Unused
Connection
AC In
Serial
RS 485
44.2 4.4 4.6 4.8 5
Absorbance (a.u.)
Wavelength (µm)
CO2
CO
Ethernet

SmartDGA Hardware Manual System Overview •15
proportional to the concentration of the gas of interest. By quantifying the amount of light
transmitted to the detectors with and without the gas of interest, the concentration of gas can be
determined.
2.2.2 Other Gas Measurements
The SmartDGA utilizes various independent sensors and calculations to measure Oxygen (O2),
Hydrogen (H2), Moisture, and Nitrogen (N2). Hydrogen is measured using a metal oxide sensor,
Oxygen is measured with a galvanic cell type sensor, and Moisture is measured in-oil using a
thermoset polymer capacitive sensing element. All sensors are individually calibrated by LumaSense
Technologies for optimal performance and accuracy. Nitrogen gas values are calculated as a residual
based on temperatures, gas pressures, and other gas measurements.
2.2.3 Sampling Sequence
1. All of the oil valves are defaulted to their normally closed state between measurement
cycles.
2. A pressure equalization routine runs continuously between measurement cycles. If the
pressure inside the instrument gets too far away from the oil tank pressure (due to
temperature changes), the routine will open the oil valves and equalize the pressure.
3. When the Real-Time-Clock-Calendar of the EZHub unit reaches the time of the next
measurement cycle, it sets the instrument’s state to “Go”.
4. As a safeguard against the transformer/LTC being degassed when a cycle starts, if the
measured inlet oil pressure is not 2 psi above the measured ambient pressure, the cycle will
abort.
5. The instrument flushes the oil within its oil loops with fresh oil from the transformer/LTC.
This takes approximately 10 minutes.
6. At the end of the flush, the instrument will circulate the fresh oil sample through its inner
oil loop. The oil loop contains approximately 35 mL of oil.
7. As the sample of oil circulates past the membrane gas separator, the gas migrates across the
membrane to establish partial pressure equilibrium with the gas collection volume.
8. While the oil is circulating past the gas separator on the oil side, the gas collection volume is
circulating past the gas separator on the gas side.
9. Gas is allowed to equilibrate for a predetermined period of time.

SmartDGA Hardware Manual System Overview •16
10. Once the gas has equilibrated, its absorption levels are collected for about 10 minutes for
data processing.
11. Ambient air is passed across the Hydrogen and Oxygen sensors, conditioning them for
reading gas levels.
12. The Zero level for the Hydrogen and Oxygen is read for about 1 minute.
13. Ambient air is used to push the gas collection volume past the Hydrogen and Oxygen
sensors. The sensors read their gases for 1 minute.
14. As ambient air continues to be pushed through the instrument, the NDIR absorption levels
for ambient air is collected for about 10 minutes.
15. The data is processed.
16. The cycle is completed and the oil valves are closed.
17. The EZHub unit reads the results from the SmartDGA instrument.
18. The pressure equalization routine starts.
2.2.4 Oil-Gas Separating Membrane
Gases dissolved in the Transformer/LTC insulating oil are
sampled by the SmartDGA instrument via an amorphous
polymer membrane. The non-porous membrane absorbs
gases dissolved in the oil and transfers them to a closed gas
sample space while preventing large oil molecules from
passing. A porous metal frit support prevents distortion of
the membrane into the gas sample space allowing it to
withstand high oil pressures.
To protect the membrane against the application of
negative pressure, the oil pressure is continuously monitored and the oil valves can isolate the
membrane from the oil tank. There is a metal plate with a grid of holes on the side of the
membrane to add further support.
At the beginning of each SmartDGA measurement cycle, a flow-controlled pump refreshes an
internal reservoir with oil from the transformer/LTC system. During gas collection, the same pump is
used to continuously replenish oil at the surface of the oil-gas separation membrane to expedite gas
transfer. Measurements of gas in the sample space as well as oil temperatures and pressures are
used to conduct the dissolved gas analysis of the oil.

SmartDGA Hardware Manual Pre-Installation Verification •17
3Pre-Installation Verification
This chapter involves verifying that you have all system components, confirming the installation
locations are ready, and verifying power supply and communications setup. Also, please ensure all
valves are properly shut with limited to no oil leakage.
3.1 Unpacking and Verifying Contents
When unpacking and inspecting your system components:
1. Check all materials in the container against the enclosed packing list.
2. Carefully unpack and inspect all components for visible damage.
3. Save all packing materials, including the carrier’s identification codes, until you have
inspected all components and find that there is no obvious or hidden damage.
Note: LumaSense Technologies cannot be responsible for shortages against the packing
list unless a claim is immediately filed with the carrier. If you note any damage or suspect
damage, immediately contact the carrier and LumaSense Technologies, Inc. Final claim
and negotiations with the carrier must be completed by the customer.
3.2 Confirming Installation Locations
Confirm that the mounting locations for the SmartDGA instrument and associated mounting
requirements are complete and the site is ready for installation. Power supply should already be
ready for connections and communication systems should be set up for installation.
3.2.1 Confirm Mounting for SmartDGA Instrument
Confirm that the dimensions of the instrument work for the selected installation location and that
the valve kit included is suitable for installation.
Instrument Dimensions
Verify that the installation location is suitable for the dimensions of the SmartDGA instrument:
20.918”
531.32 mm
10.765”
273.43 mm
12.152”
308.66 mm

SmartDGA Hardware Manual Pre-Installation Verification •18
Note: The SmartDGA Instrument is designed for vertical installation. Horizontal
installation is not recommended.
Caution: The SmartDGA Instrument must be installed in a location that is shaded
throughout the day. Rapid sunlight induced heating will negatively affect SmartDGA
measurements. See the LumaSense offered sun shade in Section 9.12 and contact us for
more information.
Caution: The SmartDGA instrument is designed to withstand typical vibration levels
found on transformers. Certain combinations of drain valve pipe diameter and length,
combined with line frequency, may result in a mechanical harmonic which amplifies
the inherent line frequency of the transformer. This can occur in the range of 180-
240 Hz. The SmartDGA instrument continues to function but it will experience
increased noise and is subject to accelerated wear due to high ‘g’ forces. If this
behavior is observed, the installation must be modified. Changes in the pipe extension
length and/or diameter or additional mechanical support can be used to shift the
harmonic frequency higher. Alternatively, the SmartDGA instrument can be mounted
off transformer.
3.2.2 Confirm Valve Kit
Review your site setup and the items you received from LumaSense alongside the charts below. You
may need additional reducers to connect the equipment, so please review closely.
VA-1 (Single Valve)
Description Thread Type Clearance (Distance)
Use this kit when separate
points for oil sampling and
return are not available on
the transformer. This
should only be used when
VA-2 and VA-0 options are
not available. This valve kit
is compatible with ball,
gate, and plug valves.
Not compatible with Globe
or Butterfly valves.
Confirm that the thread type
for the valve is female 1” NPT.
If it is not a 1” NPT thread
type, you will need an NPT
reducer. Verify that you have a
reducer on hand.
To Left of the Valve > 18” (45.7 cm)
To Right of the Valve > 18” (45.7 cm)
Bottom to Ground > 12” (30 cm)
Top to Obstruction > 17” (43.2 cm)
Clearance gives the installation team easier
access to the valves for workmanship. If
there is not enough free space and
obstructions cannot be moved, a new
location may need to be chosen.

SmartDGA Hardware Manual Pre-Installation Verification •19
VA-2 (Dual Valve)
Description Thread Type Clearance (Distance)
Use this kit when there is a
bottom drain valve and a
return valve available on
the transformer. This valve
kit is compatible with ball,
gate, plug, globe, and
butterfly valves.
Mount (Bottom) Valve
Confirm that the thread type
for the valve is female 1” NPT.
If it is not a 1” NPT thread
type, you will need an NPT
reducer. Verify that you have a
reducer on hand.
To Left of the Valve > 18” (45.7 cm)
To Right of the
Valve > 18” (45.7 cm)
Bottom to Ground > 12” (30 cm)
Top to Obstruction > 17” (43.2 cm)
Return (Top) Valve
Confirm that return valve
accepts 3/8” tubing. If it is not,
you may need an NPT reducer
and adapter to decrease the
present transformer return
valve size to accept 3/8”
tubing. You can also purchase
a Swagelok adapter (PN SS-
600-1-16) that will thread into
the female 1” reducer and
accept 3/8” tubing.
Vertical distance
from the drain valve
to the return valve
3’ to 20’
(0.91 m to 6.1 m)
Piping distance from
the drain valve to
the return valve
< 32.8’ (10.0 m)
Number of right
angles to the return
valve for piping
< 5 turns
VA-0 (Inline or Off-Transformer)
Description Clearance (Distance)
Use this kit any time the SmartDGA
instrument cannot be mounted directly on
the transformer valve or when connecting
the SmartDGA Gauge instrument to a LTC
tank.
Mounting Plate
The support for the mounting plate must
be capable of holding at least 50 pounds
(22 kg) and mounted near the transformer
or LTC filter. The typical support will either
be the transformer wall or a Unistrut post
supported by concrete.
The location chosen must be appropriate
for the support and allow for oil lines to
and from the transformer or LTC filter. If
installing in a cold climate where the oil
will reach a temperature of
-10 °C or less in the lines, the lines must be
heated, otherwise the oil will be too
viscous to be pumped by the SmartDGA
instrument.
Left of the mounting plate > 18” (45.7 cm)
Right of the mounting plate > 18” (45.7 cm)
Mounting plate to the ground > 12” (30 cm)
Mounting plate to the top obstruction > 17” (43.2 cm)
Vertical distance from the
instrument to the oil ports
3’ to 20’
(0.91 m – 6.1 m)
Piping distance from the instrument
to the outlet/return port
< 32.8’
(10.0 m)
Number of right angles to the
outlet/return port for piping < 5 turns
Piping distance from the instrument
to the inlet/feed port
< 32.8’
(10.0 m)
Number of right angles to the
inlet/feed port for piping < 5 turns

SmartDGA Hardware Manual Pre-Installation Verification •20
Warning: Do not cross the top of the tank when routing piping.
3.2.3 Confirm Mounting/Location for EZHub
The EZHub unit provides power and communications for the SmartDGA system. The EZHub can be
mounted in a substation control building, a transformer control cabinet, or a NEMA4X enclosure
mounted on a wall or on a Unistrut stand.
Note: If mounting in a NEMA4X enclosure, keep environmental conditions in mind.
Direct sunlight can cause temperatures to reach above the maximum rated ambient
temperature of 55 °C.
Examples of EZHub mounting:
EZHub mounted in NEMA 4X
enclosure on a wall
EZHub mounted in NEMA 4X enclosure on
a Unistrut Stand
Confirm EZHub Type & Location
1. Confirm that the EZHub shipped for your system is correct by verifying that it has LTC,
Transformer, or both sets of connections.
LTC
Transformer
LTC & Transformer
2. Confirm distance from the EZHub installation location to the SmartDGA instrument
installation location is less than 30 m (98 ft).
Note: A standard 10 m (32 ft) outdoor weather (- 20 … 150 °C) cable is provided with the
SmartDGA system. The EZHub may be located up to 30 m (98 ft) away from the
SmartDGA instrument. Additional lengths (20 m and 30 m) as well as cold weather (rated
- 50 … 125 °C) cables of 10 m, 20 m, and 30 m are available to order from LumaSense.
3. Ensure the conduit for the connection cable between the EZHub and SmartDGA instrument
is present.