GE Kelman Minitrans User manual

GEDE-GA_M-DLIS-TE.MA-005 Rev 4.5 13-Aug-20
GE
Grid Solutions
Kelman™ Minitrans
Installation Manual
Transformer Oil
Dissolved Gas and Moisture Monitor

MA-005 –Minitrans Installation Manual –Rev 4.5 13-Aug-20 Page 2 of 86
Contents
Page
1Introduction........................................................................................................7
1.1 Product Overview................................................................................................................................................. 7
1.2 Scope.......................................................................................................................................................................... 7
2Safety ...................................................................................................................8
2.1 Symbols..................................................................................................................................................................... 8
2.2 Safety Statements ............................................................................................................................................... 8
3Requirements...................................................................................................10
3.1 Pre-installation ....................................................................................................................................................10
3.2 Handling & Storage............................................................................................................................................10
4Technical Specification ..................................................................................11
5Compliance .......................................................................................................13
6Transformer Criteria.......................................................................................14
7Mounting............................................................................................................15
7.1 PGA Transit Lock.................................................................................................................................................16
7.2 Mounting Stand Installation..........................................................................................................................16
7.2.1 Mounting the product to the stand ............................................................................................. 17
7.3 Direct Mount Cradle..........................................................................................................................................18
7.3.1 Cradle lock ............................................................................................................................................... 18
7.4 Sun Canopy............................................................................................................................................................18
8Plumbing............................................................................................................20
8.1 Transformer Valves ...........................................................................................................................................21
8.1.1 Fill valve..................................................................................................................................................... 21
8.1.2 Drain valve............................................................................................................................................... 21
8.1.3 Ancillary valves...................................................................................................................................... 21
8.1.4 Cooling loop valves.............................................................................................................................. 22
8.2 Supply & Return Valves....................................................................................................................................22
8.2.1 Oil supply.................................................................................................................................................. 22
8.2.2 Oil return .................................................................................................................................................. 23
8.3 Tubing.......................................................................................................................................................................23
8.3.1 Fitting requirements........................................................................................................................... 24
8.3.2 Fitting instructions .............................................................................................................................. 25
8.3.3 Connection to oil supply valve ....................................................................................................... 26
8.3.4 Connection to oil return valve........................................................................................................ 26
9Power .................................................................................................................29
9.1 Connections..........................................................................................................................................................29
9.2 Battery.....................................................................................................................................................................31
10 Electronics.........................................................................................................33
10.1 Input Board............................................................................................................................................................33
10.2 Alarm Connections ............................................................................................................................................33
10.3 Accessory Power.................................................................................................................................................33
10.4 External Sensors .................................................................................................................................................34
11 Communications..............................................................................................35
Appendix A Installation Tools and Supplies.................................................36
Appendix B Customer Checklist......................................................................37
Appendix C Installation Record.......................................................................38
Appendix D Tubing Specification and Ordering Details ............................41

MA-005 –Minitrans Installation Manual –Rev 4.5 13-Aug-20 Page 3 of 86
Appendix E Product Dimensions ....................................................................43
Appendix F Mounting Stand Dimensions .....................................................44
Appendix G Footprint Dimensions .................................................................45
Appendix H Sun Canopy Dimensions .............................................................46
Appendix I Input Board ....................................................................................48
Appendix J Heat Trace Cable...........................................................................51
Appendix K Direct Mount Cradle Vibration Levels.....................................52
Appendix L Direct Mount Cradle Installation..............................................54
Appendix M Transit Locks .................................................................................65
Contact & Copyright Details ...............................................................................86

MA-005 –Minitrans Installation Manual –Rev 4.5 13-Aug-20 Page 4 of 86
List of Tables and Figures
Page
Table 4-1: Technical specification........................................................................................................................................ 11
Table 5-1: Type tests.................................................................................................................................................................. 13
Figure 7-1: PGA lock –engaged (one bracket)............................................................................................................... 16
Figure 7-2: PGA lock –disengaged (two brackets) ...................................................................................................... 16
Figure 7-3: The product mounted on a stand................................................................................................................. 17
Figure 7-4: Direct mount cradle............................................................................................................................................ 18
Figure 7-5: Cradle-mount sun canopy ............................................................................................................................... 19
Figure 8-1: Schematic representation of an installation .......................................................................................... 20
Figure 8-2: Examples of possible line configurations (three of many)............................................................... 20
Figure 8-3: Possible valve locations of a transformer ................................................................................................ 21
Figure 8-4: Product connections - bottom view............................................................................................................ 25
Figure 8-5: Fitting body and tubing ..................................................................................................................................... 25
Figure 8-6: Nut at 6 o'clock position ................................................................................................................................... 25
Figure 8-7: Nut at 9 o'clock position ................................................................................................................................... 25
Figure 8-8: Bleed assembly on flange-type oil return valve..................................................................................... 27
Figure 8-9: Flange example..................................................................................................................................................... 27
Figure 8-10: Return Assembly kit......................................................................................................................................... 27
Figure 8-11: Bleed assembly on threaded-type oil return valve ........................................................................... 28
Figure 9-1: Bottom plate connections............................................................................................................................... 30
Figure 9-2: Mains fuse holders with fuses (front - inside)........................................................................................ 30
Figure 9-3: Mains fuse holders with terminal connections (top - outside)...................................................... 30
Figure 9-4: Earth terminal on bottom of enclosure..................................................................................................... 31
Figure 9-5: Coin cell battery.................................................................................................................................................... 31
Figure 10-1: Accessory power points for 12 V and 24 V ........................................................................................... 34
Table 11-1: Product communications channels............................................................................................................ 35
Figure E-1: Front and side dimensions .............................................................................................................................. 43
Figure E-2: Base dimensions .................................................................................................................................................. 43
Figure F-1 Front and side dimensions with stand........................................................................................................ 44
Figure G-1: Footprint dimensions........................................................................................................................................ 45
Figure H-1: Mounting-stand canopy front dimensions.............................................................................................. 46
Figure H-2: Mounting-stand canopy side dimensions................................................................................................ 46
Figure H-3: Cradle-mount canopy front dimensions .................................................................................................. 47
Figure H-4: Cradle-mount canopy side dimensions.................................................................................................... 47
Figure I-1: Input board............................................................................................................................................................... 48
Table I-1: List of terminals ....................................................................................................................................................... 49
Figure I-2: RS-232 & RS-485 connections ........................................................................................................................ 50
Figure K-1: Product vibration limits .................................................................................................................................... 53
Figure L-1: Direct mount cradle ............................................................................................................................................ 54
Figure L-2: Clearance requirements ................................................................................................................................... 55
Table L-1: MINI DM-Cradle retrofit kit - KITT00071..................................................................................................... 56
Figure L-3: Foam skid................................................................................................................................................................. 56
Figure L-4: Product positioned on the foam skid.......................................................................................................... 57
Table L-2: Bracket tools and fittings................................................................................................................................... 57
Figure L-5: Bracket tools and fittings ................................................................................................................................. 57
Figure L-6: Attach bracket fittings to the product ....................................................................................................... 58
Figure L-7: Tighten the fittings .............................................................................................................................................. 58
Table L-3: Top isolators tools and fittings........................................................................................................................ 58
Figure L-8: Top isolators tools and fittings ...................................................................................................................... 58
Figure L-9: Fitting the support bracket.............................................................................................................................. 59
Figure L-10: Support bracket with top isolators fitted .............................................................................................. 59
Figure L-11: Mounting slot dimensions............................................................................................................................. 59
Table L-4: Bottom isolators tools and fittings................................................................................................................ 60

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Figure L-12: Bottom isolators tools and fittings ........................................................................................................... 60
Figure L-13: The product positioned over the isolators ............................................................................................ 60
Figure L-14: Isolator with O ring ........................................................................................................................................... 61
Figure L-15: Attach fittings to isolators............................................................................................................................. 62
Table L-5: Failsafe tools and fittings................................................................................................................................... 62
Figure L-16: Failsafe tools and fittings............................................................................................................................... 62
Figure L-17 Fitting the failsafe mechanism..................................................................................................................... 63
Figure L-18: Misalignment and skew distance............................................................................................................... 64
Figure L-19: Isolators used in compression and compression distance............................................................ 64
Figure M-1: Product LCD and Power Switch ................................................................................................................... 65
Figure M-2: PGA lock –engaged (one bracket).............................................................................................................. 66
Figure M-3: PGA lock –disengaged (two brackets)..................................................................................................... 66
Table M-1: PGA lock tools & fittings.................................................................................................................................... 66
Figure M-4: PGA lock tools & fittings.................................................................................................................................. 66
Figure M-5 Remove the inner panel.................................................................................................................................... 67
Figure M-6: Disconnect the display cable......................................................................................................................... 68
Figure M-7: Disconnect the USB cable............................................................................................................................... 68
Figure M-8: Disconnect the fan cable................................................................................................................................. 68
Figure M-9: PGA lock (one of two) with screws loosened........................................................................................ 69
Figure M-10: Slide out PGA lock............................................................................................................................................ 69
Figure M-11: Slots for threaded inserts ............................................................................................................................ 69
Figure M-12: PGA lock storage position............................................................................................................................ 69
Figure M-13: PGA lock secured using Allen key............................................................................................................. 69
Figure M-14: Reconnect the fan cable ............................................................................................................................... 70
Figure M-15: Reconnect the USB cable ............................................................................................................................. 70
Figure M-16: Reconnect the display cable....................................................................................................................... 70
Figure M-17: Replace the inner panel ................................................................................................................................ 71
Figure M-18: Remove the inner panel................................................................................................................................ 72
Figure M-19: Disconnect the display cable...................................................................................................................... 73
Figure M-20: Disconnect the USB cable............................................................................................................................ 73
Figure M-21: Disconnect the fan cable.............................................................................................................................. 73
Figure M-22: Fitting PGA lock (clockwise)........................................................................................................................ 74
Figure M-23: Reconnect the fan cable ............................................................................................................................... 74
Figure M-24: Reconnect the USB cable ............................................................................................................................. 75
Figure M-25: Reconnect the display cable....................................................................................................................... 75
Figure M-26: Replace the inner panel ................................................................................................................................ 76
Figure M-27: Isolator .................................................................................................................................................................. 77
Figure M-28: Misalignment and skew distance............................................................................................................. 78
Figure M-29: Isolators used in compression and compression distance.......................................................... 78
Table M-2: Cradle lock tools & fittings............................................................................................................................... 79
Figure M-30: Cradle lock tools & fittings........................................................................................................................... 79
Figure M-31: Top isolators with fittings & failsafe items removed ...................................................................... 79
Figure M-32: Locking Piece Top............................................................................................................................................. 80
Figure M-33: Locking piece with fittings (left) ¦¦ tightened with a nut spinner (right)................................ 80
Figure M-34: Bottom isolators with partially unscrewed fittings......................................................................... 81
Figure M-35: Isolator with fittings (left) ¦¦ tightened with spanner (right)....................................................... 81
Figure M-36: Clockwise: Isolators with fittings ¦¦ back fittings tightened with spanner ¦¦ front fittings
tightened with nut spinner ..................................................................................................................................................... 82
Figure M-37: Loosen isolator front nut with nut spinner.......................................................................................... 83
Figure M-38: Loosen isolator rear outer nut with spanner...................................................................................... 83
Figure M-39: Bottom isolator with fittings removed .................................................................................................. 83
Figure M-40: Unscrew the failsafe bolt.............................................................................................................................. 84
Figure M-41: Loosen the isolator M6 nut using a nut spinner................................................................................ 84
Figure M-42: Inverted top locking piece............................................................................................................................ 85
Figure M-43: Bottom locking piece...................................................................................................................................... 85

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Figure M-44: Surplus nuts & washers stored securely on bracket bolts........................................................... 85
Related Documents
Ref#
Title
MA-005
Minitrans Operator Guide
Abbreviations & Definitions
Abbreviation
Meaning
PCB
Polychlorinated biphenyl
PPE
Personal Protective Equipment

MA-005 - Minitrans Installation Manual - Rev 4.5 13-Aug-20 Page 7 of 86
1INTRODUCTION
1.1 Product Overview
The Minitrans™ (herein referred to as the product) is an on-line DGA (Dissolved Gas
Analysis) system for transformer diagnostics. The product measures the following key
fault gases in transformer oil: hydrogen, carbon monoxide and acetylene 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.
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.
▪One user-configurable relay contact based on absolute gas and moisture values.
▪Two sunlight-visible LED arrays on the exterior of the enclosure –one green for
power, one red for alarm.
▪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.
*Note: The only recommended maintenance is periodic cleaning of the air filters, in-
line oil filter and battery replacement.
1.2 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. Operational details can be found in the product
operator guide. This manual must be read in its entirety prior to installation 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
The meaning of symbols used on the Kelman™ Minitrans:
Refer to the Installation Manual / Operator Guide to prevent death, injury,
equipment damage or loss of data.
Electrical Hazard. Risk of electric shock.
Primary Protective Earth connection.
Hot surfaces may be present.
The meaning of symbols used in this manual:
Warning: A procedure, practice, or condition could cause death or serious
injury and/or significant equipment damage.
[Caution]: A procedure, practice, or condition could cause minor injury,
equipment damage or loss of data.
Electrical Hazard: Risk of electric shock.
Hot surfaces may be present.
2.2 Safety Statements
The following safety statements must be observed:
The minimum ambient temperature for installation and service activities is
−10 °C.
WARNING: If the equipment is installed or used in a manner not specified
by the manufacturer, the protection provided by the equipment may be
impaired.
WARNING: 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’ and ‘Using Mobile
Elevated Working Platforms’ training.

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WARNING: If working at a height greater than 4 feet (1.2 metres) 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.
WARNING: The user shall 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.
Hot surfaces present on oil pipes and risk of contact with mineral oil. Use
suitable PPE.
WARNING: Once installed, this product may have more than one source of
electrical supply. Disconnect all supplies at their source before accessing
the cabinet for servicing. Follow the site lockout-tagout (LOTO) procedure.
WARNING: Disconnection from the supply is achieved through the
external circuit breaker or switch.
WARNING: Ensure all power sources, including relays, are de-energised as
stipulated by lockout-tagout (LOTO) requirements before performing any
maintenance work inside the product.
WARNING: The product is operated with the door shut under normal use.
The door shall be kept locked and should only be opened for service access
by suitably qualified and authorised service personnel. During service
access, hazardous voltages are accessible.
Only GE-trained and certified personnel may commission GE Kelman
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.
The product provides IP55 water spray protection. It is possible for a water
deluge system to exceed IP55 thresholds depending on the location,
pressure and direction of the water jets. Should customers require testing a
water deluge system in the area in which the product is installed, GE
recommends powering down the product and draping it with a suitable
waterproof covering.

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3REQUIREMENTS
3.1 Pre-installation
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 GE 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: Product packages are not suitable for stacking. 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 outlined in Table 4-1.
Table 4-1: Technical specification
PARAMETER
VALUE/MEETS
GAS MEASURED *1 & 9
RANGE
ACCURACY*2 & 3
Hydrogen (H2)
5 –5,000 ppm
± 10% or ± LDL
Acetylene (C2H2)
3 –50,000 ppm
± 10% or ± LDL
Carbon Monoxide (CO)
10 –50,000 ppm
± 10% or ± LDL
Moisture (H2O)
0 –100% Relative
Saturation *4
± 3.5%
Measurement frequency
Variable –Once per hour to once every four weeks
ENVIRONMENTAL
Operating external
temperature range
−35 °C to 55 °C
Storage temperature range
0 °C to 45 °C
Oil temperature range *5
−10 °C to 100 °C
Altitude
Up to 2000 m
Atmospheric pressure
Up to 1050 mbar
Operating humidity
0 –95% RH non-condensing
Enclosure
IP55
Weight *6
30.5 kg (68 lb)
POWER REQUIREMENTS
Nominal voltage range:
115-230 V AC, 6 A max
Rated voltage range:
103-126 V AC
207-253 V AC
AC frequency range:
47-63 Hz
Single phase Alarm Relays:
NO and NC provided*7
1 A 250 V AC, 300 mA 110 V DC, 1 A 30 V DC
Fuses *8
Mains:
10 A 500 V (Cooper Bussmann BAF), 10 × 38 mm
Accessories:
2 × 2 A 250 V (Littelfuse 392 T)
Coin cells
Panasonic CR2450 3 V 620 mAh
*1 Note: Parameters specified in application with mineral oil.
*2 Note: Accuracy is quoted for the detectors under factory calibration and test levels.
Gas-in-oil measurements may be affected by sampling and/or oil type.
*3 Note: Whichever is greater.
*4 Note: Given in ppm.
*5 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 200 ml or less. For oil
temperatures colder than −10 ºC, GE recommends the use of heat trace cabling
on piping. Low oil viscosity reduces oil flow.

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*6 Note: The weight depends on the order specification. The stated weight is for a base
product without packaging and excludes options such as a mounting stand.
Check the shipping document for the exact packaged weight.
*7 Note: Maximum DC breaking capacity for a resistive load.
*8 Note: Use only the approved and recommended fuse to ensure continued fire
protection and compliance.
*9 Note: Laboratory results can vary greatly worldwide as has been established through
many round-robin tests. Any comparison of Minitrans measurement results
against laboratory results need to be considered in this context.

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5COMPLIANCE
The product is designed to meet the following type tests as listed in Table 5-1.
Table 5-1: Type tests
CATEGORY
STANDARD
CLASS/
LEVEL
TEST
EMC Emissions
CISPR 11 / EN55011
A
Radiated & Conducted Emissions
IEC 61000-3-2
A
Harmonic Current Emissions Limits
IEC 61000-3-3
A
Limitation of voltage changes, voltage
fluctuations and flicker in public low-
voltage supply systems, for
equipment with rated current<+ 16 A
per phase and not subject to
conditional connection
FCC Part 15
A
Radiated and Conducted Emissions
EMC Immunity
EN61326-1
General Requirements
IEC 61000-4-2
B
Electrostatic Discharge
IEC 61000-4-3
A
Electromagnetic Field Immunity
IEC 61000-4-4
B
Electrical Fast Transients
IEC 61000-4-5
B
Surge Immunity
IEC 61000-4-6
A
Conducted RF Immunity
IEC 61000-4-8
A
Magnetic Field Immunity
IEC 61000-4-11
B
Voltage Dips & Interruptions
IEC61000-4-9
Pulse Magnetic Field Immunity
IEC61000-4-10
Damped Oscillatory Magnetic Field
Immunity
IEC61000-4-13
Harmonics and Interharmonics
including mains signaling at AC Power
Port, Low Frequency Immunity
IEC61000-4-16
Test for immunity to conducted,
common mode disturbances in the
frequency range 0 Hz to 150 kHz
IEC61000-4-18
Damped oscillatory wave immunity
Environmental
IEC 60068-2-1
−35 °C
Cold
IEC 60068-2-2
55 °C
Dry Heat
EN 60529
IP55
Degree of Protection
IEC60068-2-30
Cyclical damp heat
IEC60068-2-6
Sinusoidal Vibration
IEC60068-2-27
Mechanical Shock
Safety
IEC 61010-1
Safety requirements for electrical
equipment for measurement, control
and laboratory use.
EN 61010-1
Safety requirements for electrical
equipment for measurement, control
and laboratory use.

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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
−10 °C nor exceed 100 °C.
▪The transformer oil is at atmospheric pressure or above (see points below).
▪There are separate return and supply valves available for connection.
▪The ambient temperature in the area where the product resides should not fall below
−35 °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 (see Section 7.2) or direct mounted
to the body of a transformer using the GE direct mount cradle (see Section 7.3). 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 20 m (65 ft) in length, or 40 m (130 ft) in total length for
the complete oil circuit. Note: This avoids putting stress on the internal pump
and reduces the possibility of oil cavitation.
If the recommended GE mounting arrangement is not purchased, a
structurally sound weather-resistant mounting that supports the 30.5 kg (68
lb) weight of the product must be available (see Appendix F for dimensions).
The mounting stand 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 can support the combined weight of the product
and its 20 kg (45 lb) mounting stand. (See Appendix G for mounting stand
footprint dimensions.)
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.
The airflow to the vent areas on the bottom and sides of the product must not
be blocked or restricted in any way.
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.
At least 100 cm (3.3 ft) must be kept clear on the left-hand side of the product
to allow service access to the oil pump. See Appendix E.

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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 Minitrans Operator Guide for further recommendations around
testing a water deluge system.
7.1 PGA Transit Lock
The product is equipped with a factory-fitted interior PGA transit lock that consists of
two metal locking brackets each secured by two bolts. The PGA lock is engaged for
shipping and one is shown in Figure 7-1. The PGA lock must be removed prior to
powering on the product to take measurements. When not in transit, it is recommended
to store the lock in the position as shown in Figure 7-2.
Figure 7-1: PGA lock –engaged (one bracket)
Figure 7-2: PGA lock –disengaged (two brackets)
The lock must be refitted if there ever is a requirement to transport the product (or if the
product is ever to be laid horizontally). See Appendix M for more details on all locking
mechanisms and how to attach or remove the locks.
7.2 Mounting Stand Installation
It is important that the product be installed in a secure manner. For this reason, GE
offers an optional mounting stand. If the GE-manufactured mounting stand has not been
purchased, a stand must be constructed as outlined in Section 7. If the mounting stand is
purchased with the product, the product is supplied attached to a top stand and slotted
between the legs of the bottom stand for additional protection and ease of handling.
The GE-manufactured mounting stand shall be secured to the mounting surface as
follows:
▪The mounting stand shall be placed upright on a suitable mounting surface e.g. a flat
concrete pad (see Section 7 for details).
▪Use the mounting stand (recommended) or the dimensions from the mounting stand
footprint drawing (see Appendix G) to mark at least one hole for each of the four
mounting tab points.
▪Use M8 threaded fasteners with a recommended minimum length of 80 mm for the
concrete pad (or other suitable concrete anchors) to secure the mounting stand to
the mounting surface.
▪Ensure that the stand is within 5 degrees of level and plumb. If necessary, use shims
under the mounting stand feet to level the stand.

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See Appendix F for a drawing of the stand with the product mounted.
7.2.1 Mounting the product to the stand
The product must be installed on an appropriate mounting structure, such as the
optional but recommended mounting stand as shown in Figure 7-3.
The product weighs up to 30.5 kg (68 lb) so it is important to take precautions
prior to lifting. The product shall be lifted into position using sufficient
personnel or mechanical means in accordance with local regulations and
company policies.
Figure 7-3: The product mounted on a stand
The following steps are recommended for mounting the product to the mounting stand
(if purchased):
▪Have all hardware needed to join the two parts of the stand ready and within reach
(the supplied M8 60 mm bolts).
▪Ensure the bottom mounting stand is secured to the mounting surface in the desired
position using appropriate hardware, and within 5 degrees of level and plumb.
▪To secure the product to the top stand (if not already pre-attached), lift the product
and position the four mounting tabs found on its back corners onto the studs
protruding from the top stand. Then use the nuts and washers included with the
mounting stand and tighten them sufficiently to the studs.
▪Lift the product (attached to the top stand) while additional personnel help position it
over the now secured bottom mounting stand, such that the bolt holes on both the
top and bottom stands are aligned.
The product must be lifted by the main enclosure casing or top stand —not by
the door or fan etc., as this could damage the product.
▪Then attach using the supplied bolts, nuts and washers, and secure sufficiently such
that the complete assembly is level and stable.
Alternatively, for new products (not previously commissioned) it is acceptable to
carefully lay the bottom mounting stand on its back and join the product to it while on

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the ground. Then securely attach both ends of the mounting stand (in the same manner
as above), and carefully lift the whole assembly upright. Secure the assembly to the
mounting surface with appropriate hardware (see Section 7).
7.3 Direct Mount Cradle
The product can be directly mounted to the body of a transformer using the specially
designed GE Direct mount cradle as shown in Figure 7-4 (ordered separately). The cradle
reduces the effects of transformer vibration on the product and provides an alternative
space-saving secure mounting solution to the mounting stand. See Appendix K for
vibratory guidance on when the GE Direct Mount Cradle should be used. See Appendix L
for the Direct Mount Cradle installation instructions.
7.3.1 Cradle lock
The cradle lock is distinct from the PGA lock and must be installed in addition to the PGA
lock, where the product is mounted to a transformer and then transported as a unit. This
is necessary for all mobile transformers (those that get moved from site to site), or in any
situation where the product is fitted to a transformer and then transported.
All locks must be removed prior to powering on the product to take measurements. All
locks must be refitted if there ever is a requirement to transport the product (or if the
product is ever to be laid horizontally). See Appendix M for more details on all locking
mechanisms and how to attach or remove the locks.
Figure 7-4: Direct mount cradle
7.4 Sun Canopy
An optional sun canopy as shown in Figure 7-5 provides effective solar shade for the
product in environments with prolonged sun exposure. The canopy is fitted to the
mounting arrangement onsite as one of the final installation steps. Two types of canopy

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are available to order separately. The required type depends on the mounting
arrangement:
▪Mounting-stand canopy (24-0395 or a stainless-steel version 24-0522)
▪Cradle-mount canopy (KITT00100 or a stainless-steel version KITT00101)
Figure 7-5: Cradle-mount sun canopy
See Appendix H for drawings and dimensions.

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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)