GE TOP-FREEZER 16 User manual

GEDE-GA_M-DLIS-TE.MA-001 Rev 3.0 18-Jan-16
GE
Grid Solutions
Kelman TRANSFIX™-family
Installation Manual
Transformer Oil
Dissolved Gas and Moisture Monitor

Contents
1Introduction.................................................................................................................................... 5
1.1 Product Overview................................................................................................................... 5
1.2 Manual Scope......................................................................................................................... 6
2Safety.............................................................................................................................................. 7
2.1 Symbols .................................................................................................................................. 7
2.2 Warnings ................................................................................................................................ 7
3Requirements ................................................................................................................................. 9
3.1 Pre-installation ....................................................................................................................... 9
3.2 Handling & Storage................................................................................................................ 9
4Technical Specification ................................................................................................................ 10
5Compliance................................................................................................................................... 11
6Transformer Criteria..................................................................................................................... 12
7Mounting....................................................................................................................................... 13
8Plumbing....................................................................................................................................... 15
8.1 Transformer Valves.............................................................................................................. 16
8.1.1 Fill Valve........................................................................................................................ 16
8.1.2 Drain Valve ................................................................................................................... 16
8.1.3 Ancillary Valves ............................................................................................................ 16
8.1.4 Cooling Loop Valves..................................................................................................... 17
8.2 Supply & Return Valves........................................................................................................ 17
8.2.1 Oil Supply...................................................................................................................... 17
8.2.2 Oil Return ...................................................................................................................... 18
8.3 Tubing ................................................................................................................................... 18
8.3.1 Fitting Requirements.................................................................................................... 20
8.3.2 Fitting Instructions ....................................................................................................... 22
8.3.3 Connection to Oil Supply Valve.................................................................................... 22
8.3.4 Connection to Oil Return Valve.................................................................................... 23
9Power............................................................................................................................................ 26
9.1 Connections.......................................................................................................................... 26
9.2 Cold Start .............................................................................................................................. 28
9.3 Battery .................................................................................................................................. 28
10 Electronics ................................................................................................................................ 30
10.1 System Board ....................................................................................................................... 30

10.2 Alarm Connections............................................................................................................... 30
10.3 Accessory Power.................................................................................................................. 31
10.4 External Sensors................................................................................................................... 31
11 Communications...................................................................................................................... 32
11.1 Electromagnetic Compatibility (EMC) requirements........................................................... 33
Appendix A Installation Tools and Supplies.................................................................................... 34
Appendix B Customer Checklist ...................................................................................................... 35
Appendix C Installation Record ....................................................................................................... 36
Appendix D Tubing Specification and Ordering Details ................................................................. 40
Appendix E Dielectric fittings........................................................................................................... 43
Appendix F Product Dimensions..................................................................................................... 45
Appendix G Mounting Stand Dimensions ....................................................................................... 48
Appendix H Footprint Dimensions................................................................................................... 50
Appendix I System Board ............................................................................................................... 51
Appendix J Heat Trace Cable.......................................................................................................... 54
Contact & Copyright Details ................................................................................................................ 55
Table of Figures
Figure 8—1: Schematic representation of an installation.................................................................. 15
Figure 8—2: Examples of possible line configurations (three of many)............................................. 15
Figure 8—3: Transformer Valve locations........................................................................................... 16
Figure 8—4: TRANSFIX 1.6 connections - bottom view ...................................................................... 20
Figure 8—5: MULTITRANS connections - bottom view....................................................................... 21
Figure 8—6: TAPTRANS connections - bottom view........................................................................... 21
Figure 8—7: Fitting body and tubing................................................................................................... 22
Figure 8—8: Nut at 6 o'clock position.................................................................................................. 22
Figure 8—9: Nut at 9 o'clock position.................................................................................................. 22
Figure 8—10: Bleed assembly on flange-type oil return valve .......................................................... 23
Figure 8—11: Flange example ............................................................................................................. 24
Figure 8—12: Return Assembly kit....................................................................................................... 24
Figure 8—13: Bleed assembly on threaded-type oil return valve...................................................... 25
Figure 9—1: Location of mains supply ................................................................................................ 27
Figure 9—2: Protective cover............................................................................................................... 27
Figure 9—3: Earth terminal on bottom of enclosure .......................................................................... 28
Figure 9—4: Voltage selector switch................................................................................................... 28
Figure 9—5: Coin cell battery............................................................................................................... 29
Figure 10—1: Accessory power points for 12 V and 24 V .................................................................. 31
Figure 11—1: Ferrite placement on RS-485........................................................................................ 33

Figure F—1: TRANSFIX 1.6 dimensions................................................................................................ 45
Figure F—2: TAPTRANS dimensions..................................................................................................... 46
Figure F—3: MULTITRANS dimensions................................................................................................. 47
Figure G—1: TRANSFIX 1.6 & MULTITRANS mounting stand dimensions –top, front & side............ 48
Figure G—2: TAPTRANS mounting stand dimensions –top, front & side .......................................... 49
Figure H—1: TRANSFIX 1.6 & MULTITRANS footprint dimensions ...................................................... 50
Figure H—2: TAPTRANS footprint dimensions..................................................................................... 50
Figure I—1: System board.................................................................................................................... 51
Figure I—2: RS-232 & RS-485 connections ......................................................................................... 53
List of Tables
Table 4—1: Technical specification ..................................................................................................... 10
Table 5—1: Type tests .......................................................................................................................... 11
Table 11—1: Product communications channels............................................................................... 32
Table I—1: List of terminals.................................................................................................................. 52

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1INTRODUCTION
1.1 Product Overview
The TRANSFIX™family of products (herein referred to as the product, meaning the
TRANSFIX 1.6, MULTITRANS and TAPTRANS) are on-line DGA (Dissolved Gas Analysis)
systems for transformer diagnostics. The products measure the following key fault gases
in the transformer oil: hydrogen, methane, ethane, ethylene, carbon monoxide, carbon
dioxide and acetylene. In addition they also measure oxygen, nitrogen as well as
moisture in the oil and the transformer load current. Such data provides insight on
transformer condition criteria, such as developing faults, paper degradation and
electrical arcing. Once installed, operation is straightforward. All results are stored within
the product, but can be downloaded to a PC for analysis.
In addition, the MULTITRANS has the facility to measure oil from three separate oil tanks,
for example, three transformer tanks operating in a single phase bank. The TAPTRANS
has the facility to measure oil from the transformer main tank and on-load tap changer
(OLTC), including both the separate diverter tank and selector tank where one exists.
The key features and characteristics are summarised as follows:
Utilises dynamic headspace sampling to extract target gases from the oil sample.
No consumables, such as carrier gases are required.
Accurate results are available as often as once per hour.
Minimal maintenance.
Uses highly accurate and stable Photo-acoustic Spectrographic technology.
Fully embedded microprocessor with non-volatile internal memory storage for
10,000 records.
Stainless steel outdoor-rated IP55 enclosure connected to the transformer by
robust stainless steel tubing.
All gas sensing is carried out internally –no external gas sensors.
Transformer load tracking is available.
Six user-configurable relay contacts based on absolute gas and moisture values.
Two user-configurable sunlight-visible LED arrays on the exterior of the enclosure
–one red for alarm, one yellow for caution.
Two standard sunlight-visible LED arrays –green for power, blue for service.
Communication options include: Ethernet, RS-232, Cellular modem (GSM/GPRS),
PSTN modem, RS-485 and Fibre Optic. Other options may be available on request.
Internal USB connection provided for commissioning and service, or local data
download.

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1.2 Manual Scope
This manual details the installation requirements and procedure, including important pre-
installation tasks to be considered when planning and preparing for the installation. It
examines mounting, plumbing, power, electronics and communications —including tools,
supplies and items to purchase. Differences between the products are always qualified
by the use of the respective product name and operational details can be found in the
respective product user guides. This manual must be read in its entirety prior to
installation so as to prepare the site and obtain the necessary equipment. Refer to the
appendices for details and record site details in the Installation Record (see Appendix C).

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2SAFETY
2.1 Symbols
General Warning or Caution. Refer to the Installation Manual / User
Guide to prevent injury or damage to equipment.
Electrical Hazard. Risk of electric shock.
Primary Protective Earth connection.
Hot surfaces may be present.
2.2 Warnings
The minimum ambient temperature for installation and service activities is
−10 °C.
If the equipment is installed or used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
If working at height, third parties must have received appropriate training for
working at height prior to work commencing. This includes, but is not limited to
"Working at height training".
If working at a height greater than 4 feet or at a height greater than that
stipulated by national or site regulatory requirements, it is the responsibility of
the installer to ensure that planned work complies with those requirements.
The installer shall also ensure that any third-party equipment, such as an
approved platform, scaffold or lift is suitable and safe before commencing
work. Ladders or improvised platforms do not meet GE service engineer
requirements.
Once installed, the product may have more than one source of supply.
Disconnect all supplies at their source before accessing the cabinet for
servicing. Follow the site lockout-tagout (LOTO) procedure.

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Only GE-trained and certified personnel may commission GE products.
Commissioning tasks include making any connections and/or performing any
work within the enclosure, or performing tasks such as purging the oil circuit
between the transformer and the product, and/or all first start-up procedures
relating to equipment or firmware/software.

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3REQUIREMENTS
3.1 Pre-installation
Ensure that the mains selection switch in the product is set to the relevant voltage range.
The product can be safely connected to an energised or non-energised transformer.
However, if installation personnel are required to work in an energised environment they
must be made aware of this prior to work commencing and must observe all health and
safety practices, especially when working with conductive materials such as stainless
steel installation tubing. If either of the oil supply or return valves to be utilised brings
personnel within restricted approach boundaries then the transformer must be de-
energised and isolated before such work is performed.
To ensure success, careful planning and proper execution of the tasks outlined in this
manual are essential. In addition, the GE Customer Service Centre representative will
need specific information in order to provide recommendations for a trouble-free
installation. If GE is to perform the installation, the installation will not be scheduled until
all pre-installation tasks outlined in this manual are complete (as performed by the
customer and GE).
The appendices to this manual contain additional information, such as drawings, forms
and checklists that need to be reviewed and completed prior to the installation. This
relates to materials and facilities that need to be ordered, acquired and in place well in
advance of the scheduled installation date. Confirmation of this needs to reach GE as
soon as possible, at a minimum four weeks prior to the installation date, unless prior
arrangements have been made with the installation group. This aids in planning and
supporting the installation thereby ensuring a trouble-free commissioning process.
3.2 Handling & Storage
For short-term storage (defined as less than one week), it is acceptable to store the
products in the open air, provided that they are protected from wet weather and direct
sunlight by a suitable customer-supplied waterproof covering and also provided that the
outside temperature does not exceed 45 °C or fall below 0 °C. For storage periods
exceeding one week, customers are requested to store the product in a fully enclosed
building that is free from damp and extremes in ambient temperature (defined as above
30 °C or below 2 °C).
Note: TAPTRANS packages do not include a mounting stand top section, so are unsuitable for stacking.
Note: Customers are fully responsible for ensuring that stacked pallets are stable and, if necessary,
providing additional external support. Damage incurred as a result of poor customer handling or storage
will not be covered under the GE warranty.

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4TECHNICAL SPECIFICATION
The product meets the following technical specification as listed in Table 4—1.
Table 4—1: Technical specification
PARAMETER
VALUE/MEETS
GAS MEASURED
MEASUREMENT RANGE (ppm) and accuracy
Hydrogen (H2)
5 –5,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Methane (CH4)
2 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Ethane (C2H6)
2 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Ethylene (C2H4)
2 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Acetylene (C2H2)
0.5 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Carbon Monoxide (CO)
2 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Carbon Dioxide (CO2)
20 –50,000 Accuracy ± 5% or ± LDL (whichever is greater) *1
Oxygen (O2)
100 –50,000 Accuracy ± 10% or ± LDL (whichever is greater) *1
Nitrogen (N2)
(Available on free-breathing transformers
only)
10,000 –100,000 ppm Accuracy ± 15% or ± LDL (whichever is
greater) *1
Moisture (H2O)
0 –100% RS (given in ppm)
ENVIRONMENTAL
External temperature range
−40 °C to 55 °C
Oil temperature range
−20 °C to 120 °C *2
Altitude
Up to 2000 m
Atmospheric pressure
Up to 1050 mbar
Operating humidity
10 –95% RH non-condensing
Enclosure
IP55
Weight
72 kg (159 lb) TRANSFIX 1.6
88 kg (194 lb) TAPTRANS
76.5 kg (169 lb) MULTITRANS
POWER REQUIREMENTS
110 / 230 V AC*3 (factory set), 50/60 Hz, 8 A Max
Single phase Alarm Relays: NO and NC
provided
3 A 250 V AC, 150 mA 300 V DC*4, 200 mA 125 V DC, 3 A 30 V DC
Fuses *5
10 A 500 V (Cooper Bussmann BAF), 10x38 mm
MEASUREMENT FREQUENCY
Variable –Once per hour to once every 4 weeks
*1 Note: Accuracy quoted is the accuracy of detectors during calibration; gas-in-oil measurement
accuracy may also be affected by sampling and/or oil type.
*2 Note: Based on testing carried out using VOLTESSO™ 35 mineral oil over a ¼ in. pipe run of 10 metres
or less from oil supply or return valve to product connection point, and on transformer oil supply valve
volumes of 200ml or less. For oil temperatures colder than -20 ºC, GE recommends the use of heat trace
cabling on piping.
*3 Note: Voltage ranges:
Set Voltage (V AC)
Minimum I/P Voltage (V AC)
Maximum I/P Voltage (V AC)
110
100
121
230
207
253
*4 Note: Maximum DC breaking capacity for a resistive load.
*5 Note: Use only the approved and recommended fuse to ensure continued fire protection and
compliance.

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5COMPLIANCE
The product meets the following type tests as listed in Table 5—1:
Table 5—1: Type tests
Category
Standard
Class/Level
Test
EMC Emissions –
EN 61326-1:2006
CISPR 11
A
Radiated & Conducted Emissions
FCC Part 15
A
Radiated & Conducted Emissions
EN 61000-3-2
A
Harmonic Current Emissions
Limits
EMC Immunity –
EN 61326-1:2006
EN 61000-4-2
IV
Electrostatic Discharge
EN 61000-4-3
III
Electromagnetic Field Immunity
EN 61000-4-4
III
Electrical Fast Transients
EN 61000-4-5
III
Surge Immunity
EN 61000-4-6
III
Conducted RF Immunity
EN 61000-4-8
IV & V
Magnetic Field Immunity
IEC 61000-4-9
X
Pulsed Magnetic Field Immunity
IEC 61000-4-10
X
Damped Oscillatory Magnetic
Field Immunity
EN 61000-4-11
III
Voltage Dips & Interruptions
IEC 61000-4-12
X 2.5 kV & 1kV
Oscillatory Wave
IEC 61000-4-18
X
Damped Oscillatory Wave
EN 61000-3-3
Pst 10 min, Plt 120 min
Voltage fluctuations & flicker
EN 60255-5
5 kV, 2 kV & 500 V DC
Impulse, Dielectric & Insulation
resistance testing
Environmental
IEC 60068-2-1
−40 °C
Cold
IEC 60068-2-2
55 °C
Dry Heat
IEC 60068-2-6
10 –150 Hz, 0.5 g operation
10 –150 Hz, 0.5 g endurance
Vibration
IEC 60068-2-30
55 °C, 95% RH
Damp Heat
EN 60529
IP55
Degree of Protection
Safety
IEC 61010-1
2010
EN 61010-1
2010
UL 61010-1
2012

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6TRANSFORMER CRITERIA
The transformer shall meet the following criteria:
The transformer contains mineral type oils (paraffinic or naphthenic) that meet the
requirements of IEC 60296, BS EN 60296, VDE 0370 or ASTM D 3487.
The transformer oil must be certified PCB free.
The temperature of the oil at the outlet valve of the transformer should not fall
below −20 °C nor exceed 120 °C.
The transformer oil is at atmospheric pressure or above (see points below).
There are separate supply and return valves available for connection.
The condition of the transformer supply and return valves must allow a secure
long-term connection to the product. The valve size should measure at least
15 mm (½ in.) in diameter.
The ambient temperature in the area where the product resides should not fall
below −40 °C nor exceed 55 °C.
If the transformer is nitrogen blanketed, check the pressure/vacuum gauge. If
the pressure is positive, then the product can be installed. If the pressure is
negative, a vacuum exists within the transformer. Air will be drawn into the
transformer when a valve is opened. Air bubbles could be damaging to the
transformer if the transformer is energised.
Do not install the product on an energised transformer that is under vacuum.
Dielectric fittings are a safety measure to prevent circulating currents from
flowing in the tubing circuits whenever a transformer is not grounded to the
same point as the monitoring product. Customers should consult with their
local tubing supplier to source suitable dielectric fittings if required.

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7MOUNTING
Depending on requirements and the installation environment, the product can be
mounted on a separate standalone mounting stand (recommended) or direct mounted to
the body of a transformer. When considering where and how to mount the product,
observe the following points to ensure an appropriate mounting configuration:
The location for the product shall allow easy access to the transformer oil
supply and return valves, so that tubing runs can be kept to a minimum,
particularly in case of extreme temperature. The supply and return tubing runs
between each transformer valve and the product connection point should not
exceed 30 m (98 ft) in length, or 60 m (196 ft) in total length for the complete oil
circuit. Note: This avoids putting stress on the internal pump and also reduces the possibility
of oil cavitation.
If the recommended GE mounting stand is not purchased, a structurally sound
weather-resistant mounting that supports the 80 kg (177 lb) of the TRANSFIX
1.6 / MULTITRANS, or the 90 kg (199 lb) of the TAPTRANS must be available (see
Appendix G for dimensions). It must also be designed to be securely fastened to
a flat mounting surface. Additional reinforcement and/or dampening may be
necessary if local conditions (environmental or otherwise) could expose the
product to potential external forces or vibration.
The product must be mounted on a flat surface within 5 degrees of plumb and
level on both axes, which is capable of supporting the combined weight of the
product and its mounting stand. (See Appendix G and Appendix H.)
If a new concrete pad is required, GE recommends that it be at least 61 cm (24
in.) wide by 122 cm (48 in.) long and 9 cm (3 ½ in.) thick with a #3 (10 mm) steel
reinforcing bar around the perimeter. (Earth bonded as per local or site practice
and code.)
The product must not be mounted where it could interfere with the regular
maintenance of the transformer.
The product must not be mounted where it could interfere with the airflow of
the transformer’s cooling system.
At least 100 cm (3.3 ft) must be kept clear of the Peltier cooler. The airflow to the
vent areas on the bottom and sides of the product must not be blocked or
restricted in any way. See Appendix Figure F—1.
At least 75 cm (2.5 ft) must be kept clear directly in front of the product. The
front door of the product opens for access during installation, maintenance and
operation.
It is acceptable to mount the product to the body of a transformer, which is
exhibiting normal operational levels of vibration, provided that

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care is taken to ensure a level and secure mounting configuration;
the product is mounted within 5 degrees of plumb and level on both axes;
the product is mounted in such a way as to support the total weight of the
product;
the product is mounted to an area of the tank body with minimum vibration,
such as close to a corner or the stiffeners;
guidance on inlet and outlet oil supply lengths and configuration is followed.
If mounting to the body of a transformer, GE’s recommendation is to do so with
the top half of the GE-supplied mounting stand. If there is concern about
extreme vibration on a transformer, GE strongly advises against mounting the
product to the body of a transformer. Furthermore, should damage occur to
the product that is attributable to the mounting arrangement and/or excessive
transformer vibration, such damage will not be covered under warranty. Care
should be taken at all times to ensure that damage does not occur to the
transformer or the product during installation.
The chosen location should take account of the potential requirement for
testing an onsite water deluge system (if applicable), such that the product is
not located in the direct line of water jets. While the product provides IP55-level
water spray protection, a water deluge system could exceed IP55 thresholds
depending on the location, pressure and direction of the water jets. See the
relevant product User Guide for further recommendations around testing a
water deluge system.

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8PLUMBING
The product removes oil from the transformer, extracts the gases, analyses the gases
and then returns the oil to the transformer. The locations from which the oil is removed
and to which it is returned are important for the accurate analysis of the gases (see
Figure 8—1 and Figure 8—2).
Figure 8—1: Schematic representation of an installation
The oil is removed from one valve of the transformer (the supply valve) and returned via
another (the return valve). The location of the supply valve should produce an oil sample
that is a well-mixed representation of the transformer oil. The following pages contain
points to consider when choosing where to connect the oil circuit from the transformer to
the product.
Figure 8—2: Examples of possible line configurations (three of many)

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8.1 Transformer Valves
The possible valve locations of a transformer are shown in Figure 8—3.
Figure 8—3: Transformer Valve locations
8.1.1 Fill Valve
If the transformer is nitrogen blanketed, the fill valve or any other valve at the top of the
transformer should not be used as an oil supply valve because there is no guarantee that
there will always be oil at this position. However, it is acceptable to return oil through this
valve.
8.1.2 Drain Valve
The drain valve may be used as an oil supply or oil return valve. However, it is particularly
useful to return the oil to the transformer through this valve because it is near ground
level, providing an easily accessible point to bleed the air from the oil lines during the
installation.
8.1.3 Ancillary Valves
Some transformers have an array of ancillary valves and ports. These valves can be a
good choice to connect the product to the transformer, although it is important to know
how these valves route inside the transformer.

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Ensure that the valve chosen to return oil is not internally piped to another
location within the transformer, such as the headspace or the internal
windings.
8.1.4 Cooling Loop Valves
The product should only be supplied with oil from a cooling loop valve if there are no
other valves available. Note: If oil has to be taken from an oil-forced cooling loop, the oil supply valve
must be located on the high pressure side of the oil pump.
Do not return oil to the cooling loop unless it is absolutely clear that the cooling
is not directed flow and that there are no other alternative valves in which to
connect the product.
8.2 Supply & Return Valves
All transformers have different valve configurations. The transformer supply and return
valves should be assessed for durability to ensure that a reliable connection can be
made. The valve size should measure at least 15 mm (½ in.) in diameter. These valves will
need to be adapted to ¼ in. female NPT fittings to properly fit the ¼ in. NPT male fittings
on the product. When choosing how to prepare the oil supply and return valves, consider
these points:
8.2.1 Oil Supply
Oil is typically taken from a valve midway up on the transformer or from an active
cooling loop. Note: If oil has to be taken from an oil-forced cooling loop, the oil supply valve
must be located on the high pressure side of the oil pump. It is necessary to ensure that the
oil is taken from a location where the oil is well mixed and in the active flow of
transformer oil. The oil temperature at this location should not exceed 120 °C or
be lower than −20 °C.
The distance between the oil supply valve and oil return valve should be at least
30 cm (12 in.) to prevent mixing of the de-gassed oil with the transformer oil being
sampled.
Fittings must be provided to adapt the oil supply valve to a ¼ in. female NPT fitting
using fittings and adaptors made from stainless steel, brass or black iron.
Do not use galvanised steel, copper or plastic fittings as these materials can
negatively affect the gas concentrations in the sample line.
If the oil supply valve is located more than 1.82 m (6 ft) above the base of the
transformer, it is recommended that an additional ¼ in. ball valve be placed in the
oil supply line within easy reach while standing, and in an easily accessible and

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visible location. This valve can be used to conveniently shut off the oil supply, if
required.
8.2.2 Oil Return
Oil is typically returned to a valve lower on the transformer, such as the
transformer drain valve.
Do not return the oil to a location that leads directly to a critical location within
the transformer, such as a cooling loop designed for directed cooling.
Oil returning to the transformer must be via the ‘Return Assembly’provided in the
product installation kit. This assembly incorporates a check valve, a ball valve and
a port that facilitates bleeding the system of air during the installation process.
The bleed port must be oriented up so that air can be drawn from it. The assembly
can be reconfigured to fit the transformer valve and adaptor, but must first be
adapted from a ¼ in. female NPT fitting.
If the oil return valve is located more than 1.82 m (6 ft) above the base of the
transformer, it is recommended that an additional ¼ in. ball valve be placed in the
oil return line within easy reach while standing, and in an easily accessible and
visible location. This valve can be used to conveniently shut off the oil return, if
required.
It is important to ensure that the configuration of the Return Assembly eliminates
any pre-existing air pockets. This is achieved by the use of a Tee on the return
valve with the bleed port facing upwards. To reduce the possibility of air pockets
behind the flange, the position of the ¼ in. NPT hole must be drilled near to the top
of the flange offset from the centre (see Figure 8—11).
Note: An optional manual oil sampling arrangement can be fitted to the oil inlet on the base of the
product. For more information, contact the GE Customer Service Centre.
8.3 Tubing
Stainless steel tubing is used to connect the product to the transformer. The amount of
tubing required is based on the location of the product in relation to the valves on the
transformer.
Stainless steel is the only material that should be used –the use of any other
tubing material would invalidate the results of the analysis and void the
warranty of the product. (See Appendix D for a full description of the tubing.)
It is also recommended that each section of tubing between the transformer and the
product be installed as one continuous piece, and to use as few fittings as possible to
reduce restriction and minimise the risk of oil leaks.

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Note: Products, such as MULTITRANS, that are connected to more than one transformer must have
suitable dielectric fittings placed in-line with the tubing and installed close to the product (see Appendix E
for more details).
Consider these points when choosing where to route the tubing and estimating how
much tubing is required:
The route must not interfere with the regular maintenance of the transformer. The
tubing shall not be routed so that it could be stepped on, tripped over or damaged
by activities near the transformer.
The route shall be selected to allow the tubing to be secured to existing structures.
It is important that the tubing be adequately secured to the structure of the
transformer or ancillary structure with appropriate mounting hardware and
fasteners. (Swagelok or Ham-Let offer several options for mounting and securing
tubing.)
When measuring the routes chosen for the tubing between the product and the
transformer oil supply and return valves –corners, bends and other obstacles
may add to the overall length and must therefore be taken in to consideration.
The rigid tubing is typically supplied in 6 m (20 ft) lengths (see Appendix D). If the
length of either tubing path exceeds 6 m (20 ft), ¼ in. stainless steel compression
unions will need to be provided along with the additional tubing. The required
amount of tubing, in accordance with the specification in Appendix D, must be on
site on the day of the installation.
Bending the rigid tubing is a complicated procedure and if there is a change to the
proposed route during the installation it could require extra tubing. For this
reason, it is advisable to order at least 20% more tubing than the initial required
estimate.
Flexible tubing is also available, but is more expensive than rigid tubing, and must
be ordered in custom lengths.
If the supplied shut-off valves are mounted to transformer valves that are 1.82 m
(6 ft) or more above the ground, an additional ¼ in. stainless steel compression
ball valve should be installed on the ¼ in. tubing at an easy to reach and visible
location. This valve should be located not more than 1.82 m (6 ft) above the
ground. This will facilitate turning off the oil flow, if needed, without having to
climb to reach the valve. One additional ¼ in. stainless steel compression ball
valve is included in the product installation kit.
If the oil temperature can fall below −20 °C, a heat trace may be fitted to the
oil pipe to increase the oil temperature before it enters the product. Note: The heat
trace shall need to be powered externally and be installed in accordance with the manufacturer’s
instructions and local wiring regulations.

MA-001 –TRANSFIX-family Installation Manual –Rev 3.0 18-Jan-16 Page 20 of 55
8.3.1 Fitting Requirements
Figure 8—4 to Figure 8—6 shows the bottom plate connection points for each product.
The stainless steel tubing should be fitted between the transformer and the product as
follows, ensuring that:
The supply line is connected to the OIL IN port (this is the bulkhead fitting at the
bottom of the product that is located closest to the right-hand-side when viewed
from the front). This line will route to the transformer supply valve.
The return line is connected to the OIL OUT port (this is the bulkhead fitting at the
bottom of the product that is located closest to the left-hand side when viewed
from the front). This line will route to the Return Assembly on the transformer
valve.
All stainless steel tubing is clean and de-burred before attaching the tube fittings.
All tubing is properly secured to the transformer or other suitable non-vibrating
structures.
All tube fittings are sufficiently tight and tightened as per the fitting instructions
below (also outlined in the relevant Swagelok or Ham-Let documentation).
Figure 8—4: TRANSFIX 1.6 connections - bottom view
A. Oil-out D. Ambient temperature sensor
B. Oil-in E. Power-in (gland)
C. Manual sampling port F. M8 earth connection point