ABB ILUJ000004-BLE User manual

ABB Inc.
Instruction Booklet Distribution Transformers
Jefferson City, MO
ISO 9001 Certified
I.B. 46-060-1, Section E
ILUJ000004-BLE
Effective: January, 2008
Instructions for Secondary
Unit Substation Transformers
150-3000 KVA, Three Phase
1.0 INTRODUCTION
These instructions apply to liquid filled secondary unit
substation transformers manufactured by the ABB
Transformer Facility at Jefferson City, Missouri.
Secondary Unit Substations are typically composed of
three (3) major sections: the high or medium voltage
section; transformer section; and low voltage section.
These sections can be close coupled whereby the sections
are bolted directly together to form a single line of electrical
equipment or the sections can be separated by distance
and connected by conduits or electrical buss work. These
instructions only apply to the transformer section. Please
refer to instruction books for adjoining sections where
applicable.
The transformers described herein are designed for the
conditions normally encountered on electric utility power
distribution systems. As such, they are suitable for use
under the “usual service conditions” described in ANSI
C57.12.00 (General Requirements for Liquid-Immersed
Distribution, Power and Regulating Transformers). All other
conditions are considered unusual service and should be
avoided.
2.0 SAFETY
WARNING: READ THIS INSTRUCTION BOOK
CAREFULLY BEFORE ATTEMPTING TO
INSTALL, MAINTAIN, OPERATE OR SERVICE
THE TRANSFORMER. FAILURE TO FOLLOW
INSTRUCTIONS CAN CAUSE SEVERE INJURY,
DEATH, OR PROPERTY DAMAGE.
Keep this Instruction Book available to those responsible
for the installation, maintenance, operation, and service of
the transformer. Safety as defined in this Instruction Book
involves two conditions:
Personal injury.1
Product or property damage.2
SEE IMPORTANT “DISCLAIMER OF WARRANTIES AND
LIMITATION OF LIABILITY” ON PAGE 8.
Safety notations, intended to alert personnel of possible
personal injury, death or property damage, have been
inserted in the instructional text prior to the step in which
the condition is cited. These safety notations are headed by
one of three intensity levels which are defined as follows:
DANGER1 – Immediate hazard which
will cause severe personal injury, death, or
substantial property damage.
WARNING2 – Hazard or unsafe practice
which can cause severe personal injury, death or
substantial property damage.
CAUTION3 – Hazard or unsafe practice
which will or can cause minor personal injury or
minor property damage.
The transformer should be operated and serviced only by
competent personnel, familiar with good safety practices.
These instructions are written for such personnel and are
not intended as a substitute for adequate training and
experience in the use of this equipment. Should clarification
or further information be required, or should problems arise
which are not covered sufficiently for the user’s purpose,
refer the matter to ABB Inc. When communicating with ABB
regarding the product covered by this Instruction Book,

always include the following items of information from the
transformer’s nameplate: Serial number, style number, KVA
rating, high voltage and low voltage ratings.
Additionally, all applicable safety procedures such as OSHA
requirements, regional and local safety requirements, safe
working practices and good judgement must be used by
such personnel.
3.0 RECEIVING
WARNING: DO NOT LIFT THE TRANSFORMER
BY USING CRANES OR JACKS ON ANY PART OF
THE TRANSFORMER OTHER THAN THE LIFTING
HOOKS OR JACKING PADS PROVIDED FOR THIS
PURPOSE. IMPROPER LIFTING OR JACKING CAN
CAUSE SEVERE INJURY AND/OR PROPERTY
DAMAGE.
The Unit Substation Transformer is normally shipped as a
complete sub-assembly and ready to install in the field with
mating high voltage switchgear section and low voltage
section. Each transformer should be carefully inspected
upon receipt and the transportation company notified of any
damage that has been incurred. The shipping list should be
checked for possible shortages.
Unit Substation Transformers are normally shipped on a
pallet. Palletized transformers may be moved readily by a
lift truck, crane, or cart. The lifting hooks supplied on the
sides of the transformer enable it to be lifted by crane.
Be sure the device chosen has the capacity to lift, or move,
the complete unit. (Weight is shown on the nameplate.)
Lift the transformer utilizing all the hooks and use proper
spreaders to obtain a vertical lift.
Air Terminal Chambers (ATC’s) with hinged access panels
are furnished with either “hex-head” or when specified
“penta-head” locking bolt that must be loosened to open
the compartment. This bolt can be turned with a standard
socket (wrench), as used widely in the utility industry.
4.0 EXTERNAL INSPECTION
WARNING: THE OIL MUST BE AT THE PROPER
LEVEL (25° C LEVEL) BEFORE VOLTAGE IS
APPLIED TO THE TRANSFORMER. FAILURE
TO MAINTAIN THE PROPER OIL LEVEL CAN
CAUSE SEVERE PERSONAL INJURY, DEATH OR
SUBSTANTIAL PROPERTY DAMAGE.
The oil level should be checked by inspecting the liquid level
gauge. Any unit which does not have the proper oil level
should be checked for leaks and refilled before placing in
service. Refilling with oil is an unusual field condition and
requires extreme care. The first priority is to determine the
reason for the low oil level and may require leak repair or
replacement of defective gaskets or seals.
If the oil level is slightly below normal but still above the
internal transformer windings, oil can be added in the
field by using the fill couplings. Refer to the nameplate
to indicate the type of oil that is used and only fill with oil
that is approved. Take caution to ensure that the correct
fluid is used and ensure that other contaminates are not
introduced. Use only quality oil per ASTM D3487 when
adding oil to the transformer. The transformer was filled
or processed at the factory with non-PCB dielectric fluid
in accordance with Federal Polychlorinated Bi-phenyl
(PCB) Regulations 40 CFR 761, et seq. The non-PCB fluid
contained less than 1ppm PCB at time of processing or
filling. The owner should take the necessary precautions so
that PCB contamination is not introduced during field filling
or maintenance of the transformer (refer to Fig. 2).
If the oil level is below normal and the transformer
windings are exposed to air, then field addition of
oil is not possible as trapped air in the windings can
lead to dielectric failure. In this case, the substation
transformer must be returned to a service facility for
vacuum oil filling.
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5.0 INTERNAL TANK INSPECTION
WARNING: ALWAYS VENT THE TRANSFORMER
BY FOLLOWING THE INSTRUCTIONS IN SECTION
7.3. FAILURE TO DO SO CAN CAUSE SEVERE
PERSONAL INJURY, DEATH OR SUBSTANTIAL
PROPERTY DAMAGE .
CAUTION: WHEN A TRANSFORMER IS OPENED,
TAKE ACTION TO PREVENT ENTRANCE OF
MOISTURE OR FOREIGN OBJECTS. MOISTURE,
DIRT OR FOREIGN OBJECTS CAN WEAKEN THE
INSULATION OF A TRANSFORMER AND GREATLY
SHORTEN ITS LIFE.
The transformer covered by this instruction is shipped ready
for installation and does not require internal inspection;
however, if the transformer must be opened, prevent the
entrance of moisture or other foreign material
6.0 STORAGE
The transformer should be stored completely assembled
(tank sealed and cabinetry closed) as though it were
energized and at its permanent location. Transformers
should not be stacked on top of one another, and care
must be exercised to prevent submersion in water. The
transformer should be stored on a solid, level foundation.
In the event a transformer is to be held in storage for a
period in excess of one (1) year, it is recommended the
space above the oil be pressurized with dry air to two (2)
to three (3) psig. This will prevent moisture ingress due to
negative pressure.
The transformer will be ready for service at any time
provided it has received the inspections outlined in Sections
4.0 and Section 7.0 thru 7.7.
7.0 INSTALLATION
Installation should comply with the latest edition of the
National Electrical Code and other applicable local building
codes.
7.1 Mounting
WARNING : FAILURE TO PROPERLY MOUNT THE
TRANSFORMER CAN CAUSE SEVERE INJURY,
DEATH OR PROPERTY DAMAGE.
The transformers should be mounted on a flat level pad
strong enough to support the weight of the transformer.
The unit should not be tilted in any direction greater than
1.5 degrees, as a greater tilt will cause deviations in liquid
level near live parts, pressure relief devices, or other
accessories specifically located at or near the 25 degree
C liquid level.
CAUTION: DEVIATIONS FROM SPECIFIED OIL
LEVEL CAN INCREASE THE POSSIBILITY OF A
DISRUPTIVE FAILURE.
Unit substation transformers must be adequately anchored
and secured to the pad. When seismic conditions are
specified, heavy duty seismic anchors are necessary to
meet seismic conditions. (Refer to Fig. 3).
7.2 Location
These transformers either contain flammable insulating
mineral oil fluid or less flammable seed oil. Refer to the
nameplate for the specific fluid that is provided.
For transformers that contain mineral oil which is considered
a flammable fluid, transformer failure can cause fire and/
or explosion. This possibility should be considered when
locating these transformers in close proximity to buildings
or public thoroughfares. Refer to the latest edition of the
National Electrical Code and local building codes.
7.3 Venting
Vent the transformer by manually operating the pressure
relief device provided. The transformer should be vented
before it is energized if it has been pressurized for leak test
or if the unit has been opened and resealed.
7.4 Grounding
WARNING: THE TRANSFORMER MUST BE
PROPERLY GROUNDED PRIOR TO ENERGIZING.
FAILURE TO PROPERLY GROUND CAN CAUSE
SEVERE INJURY OR DEATH.
A good, permanent low impedance ground connection must
be made to the tank by using the ground pad(s) provided
near the bottom of the tank for this purpose.
Transformers which are designed for use on a grounded
wye system, that is, one having a solidly grounded neutral,
must have the tank and other available neutrals permanently
and solidly grounded to the common neutral of the system
before the transformer is energized.
When supplied neutral grounding resistors are designed to
ground the low voltage system. Ensure that final mounting
is complete and proper electrical connections are made
Page 3

prior to energizing the transformer. Refer to instruction
manual from the neutral grounding resistor supplier.
7.5 Connections
During installation, the recommended sequence of
connections is to first make all ground connections, then
the low voltage connections, and finally the high voltage
connections. The transformer should be removed from
service by reversing the above sequence of connections.
Carefully check the transformer nameplate for its rating and
the connections that can be made to it. Avoid excessive
strain on the bushing terminals or insulators. This could
loosen the contact joints or damage the insulators.
7.5.1 Secondary terminations
Secondary terminations are high current carrying devices
and all bolted or crimped points should be checked
prior to energizing the unit to assure the joints are tight.
When threaded terminators are attached to the threaded
secondary stud, install a backup nut on the threaded
secondary stud and back up tightly against the threaded
terminator to ensure maximum contact and to minimize
joint resistance and reduce the possibility of overheating.
7.6 Liquid Level
WARNING: ENERGIZATION OR OPERATION OF
THE TRANSFORMER WITH THE INSULATING
LIQUID LOWER THAN 1⁄2 INCH BELOW THE 25° C
LEVEL (1⁄2 INCH BELOW THE BOTTOM EDGE OF
THE LIQUID LEVEL PLUG) CAN CAUSE SEVERE
INJURY, DEATH, OR PROPERTY DAMAGE.
Never operate or apply voltage to transformer if the liquid
level is below the 25 degree C liquid level plug more than
1⁄2 inch. Check the liquid level before the transformer is
energized to ensure the proper liquid level.
NOTE: Cold temperatures can cause the liquid level to
drop, through contraction, by more than 1⁄2 inch. When this
happens, the liquid should be heated to allow for expansion
to the proper liquid level or additional liquid is to be added
to bring the liquid level up to within 1⁄2 inch of the liquid
level plug. This liquid will then have to be removed when
the unit has reached normal operating temperature. Follow
the maintenance information in Section 10.0 when adding
and removing any liquid.
7.7 Cabinet Security
WARNING: FOR UNITS WITH AIR TERMINAL
CHAMBERS (ATC’s) FAILURE TO PROPERLY
SECURE THE CABINET MAY ALLOW ACCESS
BY UNAUTHORIZED PERSONNEL WHICH CAN
CAUSE SEVERE INJURY, DEATH, OR PROPERTY
DAMAGE.
Before leaving the site of an energized transformer, make
sure that any protective or insulating barriers are in place,
the air terminal chamber is completely closed, and all
locking provisions are properly installed.
The following procedure should be used to assure air
terminal chamber security.
A. Close the left door and secure it in place with the
captive bolts supplied (pentahead or hexhead).
B. Close the right door and secure it in place by rotating
the handle in a clockwise direction until seated (handle
should then be in a vertical orientation).
C. Tighten the safety bolt (pentahead or hexhead) located
in the locking tube until fully seated.
D. Install a padlock through the door handle and locking
tube and secure.
E. Check both the left and right doors for proper fit and
security.
8.0 OPERATION
This transformer was built and tested in accordance with
the latest version of the following standards of American
National Standards Institute:
ANSI C57.12.00 — General Requirements for
Liquid-Immersed Distribution, Power and Regulating
Transformers.
ANSI C57.12.90 — Test Code for Liquid-Immersed
Distribution, Power and Regulating Transformers, and
Guide for Short-Circuit Testing of Distribution and Power
Transformers.
The unit substation transformer is an integral part of the
distribution system and consideration must be given to
proper protection from system disturbances. Protection
from excessive voltage transients and severe over currents
should be provided. To allow proper operation of over
current devices that may be supplied with the transformer,
coordination with system over current protection must be
achieved. For Unit Substations, over current protection
and over voltage protection are typically provided in the
adjoining high or medium voltage section or in the adjoining
low voltage section. Refer to applicable instruction booklets
for details.
9.0 ACCESSORIES AND COMPONENTS
9.1 Bushings
CAUTION: REMOVE ALL DIRT AND FOREIGN
MATERIAL FROM ALL BUSHINGS BEFORE
PLACING TRANSFORMER IN SERVICE. READ AND
FOLLOW THE MANUFACTURER’S INSTRUCTIONS
FOR INSTALLING SEPARABLE INSULATED HIGH
VOLTAGE CONNECTORS. DO NOT ENERGIZE
THE TRANSFORMER WITH THE SHIPPING CAPS
ON THE BUSHINGS OR INSERTS. DO NOT
OPERATE THE TRANSFORMER BEYOND THE
MANUFACTURER’S RATING. FAILURE TO DO SO
CAN CAUSE PERSONAL INJURY OR PROPERTY
DAMAGE.
9.1.1 Separable Insulated Connectors
Separable insulated connectors may be universal bushing
wells, integral bushings or bushing wells with inserts
installed. They may be either loadbreak or non-loadbreak.
Page 4

All connectors must be dry and clear of any contamination
before installation. Unused terminals should be properly
terminated to prevent possible contamination. Follow the
manufacturer’s instructions and warnings on the use of
these terminations.
9.1.2 Porcelain Bushings
High or medium voltage porcelain bushings (when
provided) are externally clamped, gasketed bushings with
eyebolt-type or spade-type terminals. Attachment lugs
(when provided) are supplied to mate with applicable cable
sizes.
9.2 Fuses For Unit Substations, fuses are typically provided
in the adjoining high or medium voltage section or in the
adjoining low voltage section.
9.3 HIGH VOLTAGE SWITCHES For Unit Substations,
high voltage or medium voltage line switches are typically
provided in the adjoining high or medium voltage section.
9.3.3 Tap Changer
WARNING: DE-ENERGIZE THE TRANSFORMER
BEFORE OPERATING THE TAP CHANGER.
FAILURE TO DO SO CAN CAUSE SEVERE INJURY,
DEATH OR PROPERTY DAMAGE.
The tap changer provides a means of changing the voltage
ratio of a transformer. The transformers are normally
supplied with an externally operated high voltage tap
changer, located on the front panel of the transformer.
(refer to Fig. 11):
A. De-energize the transformer.
B. Back out the locking screw until it is clear of the locking
hole.
C. Turn the handle to the desired tap position.
D. Tighten the locking screw to minimize the possibility of
unintentional movement.
Some large-size units are furnished with a power-
transformer tap changer drive which requires pulling of a
locking pin and a full turn of the handle for each change in
tap position.
Fig. 11
9.3.4 Dual Voltage Switch
WARNING: DE-ENERGIZE THE TRANSFORMER
BEFORE OPERATING THE DUAL VOLTAGE SWITCH.
FAILURE TO DO SO CAN CAUSE SEVERE INJURY,
DEATH OR PROPERTY DAMAGE.
WARNING: WHEN CHANGING VOLTAGE POSITION,
FUSES MAY HAVE TO BE REPLACED WITH THOSE
OF THE PROPER RATINGS.THE USE OF AN
IMPROPERLY RATED FUSE CAN CAUSE SEVERE
INJURY, DEATH OR PROPERTY DAMAGE.
On a dual voltage switch, Position 1 is the low or multiple
connected position while Position 2 is the high or series
connected position.To change the voltage position, proceed
as follows (refer to Figure 12):
A. De-energize the transformer.
B. Back out the locking screw until it is clear of the locking
hole.
C. Pull out on the handle until it will rotate.
D. Rotate the handle to the new position.
E. Release the handle.
F. Tighten the locking screw to minimize the possibility of
unintentional movement.
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Fig. 12
9.4 Surge Arresters
The function of a surge arrester is to intercept and divert
to ground various over voltage transients (such as lightning
surges) which occur on the distribution system. Surge
arresters can be installed in the Air Terminal Chambers
The arresters must be disconnected whenever high potential
or induced potential tests are made on transformers with
arresters.
9.5 Pressure Relief Device
The standard pressure relief device, located on the tank
above the liquid level, relieves excessive internal tank
pressure and reseals at a lower positive pressure. The
pressure relief device is manually operated by grasping
the end-cap (or ring if provided) and slowly pulling the cap
away from the tank until pressure is relieved.
Pressure relief diaphragm (when provided) is located on
tank top hand hole cover.
9.6 Thermometer
When supplied, a thermometer indicates the liquid
temperature near the top of the tank. The temperature
sensitive element is mounted in a leakproof well, permitting
removal of the thermometer without lowering the liquid
level. The device is furnished with an additional pointer, red
in color, to show the highest temperature attained since
last reset.
9.7 Liquid Level Gauge
When supplied, a liquid level gauge is located in the right
side of the front panel or segment 1 to indicate the variation
from the 25 degree C liquid level.
9.8 Pressure-Vacuum Gauge
When supplied, a pressure-vacuum gauge is located in
the right side of the front panel or segment 1. This gauge
indicates whether the gas space in the tank is under positive
or negative pressure.
9.9 Nameplate
A nameplate is supplied on each transformer according
to ANSI standard C57.12.00-1980, Section 5.12. Refer
to the nameplate for transformer ratings and for proper
connections of the transformer to the system. No internal
connections should be made inside the transformer other
than those shown on the nameplate.
9.10 Control Cabinet
WARNING: THE CONTROL CABINET CONTAINS
CONTROL VOLTAGE AND ELECTRICAL POWER
FOR COOLING FAN OPERATION. ENSURE THAT
CABINET IS ADEQUATELY GROUNDED AND
ALWAYS REMOVE THE CONTROL CABINET
POWER SUPPLY PRIOR TO PERFORMING WORK
INSIDE THE CONTROL CABINET EQUIPMENT OR
CONNECTED ACCESSORIES. FAILURE TO DO SO
COULD RESULT IN SEVERE PERSONAL INJURY,
DEATH OR PROPERTY DAMAGE.
Refer to wiring diagram for electrical circuits inside the
control cabinet. Use an indicating light type device when
checking an alarm switch. Failure to do so could result in
damage. Inspect cords or conduits for wear and evidence
of damage. Repair or replace any damaged cords or
conduits.
The cooling fan motor electrical data can be found on
the motor nameplate or the wiring diagram. The controls
for the fan motor are contained in the control cabinet
mounted on the transformer.
The “Manual-Auto” switch determines the mode of
operation. When the switch is in the “Manual” position, the
fans will operate continuously. When the switch is in the
“Auto” position, the fans will be automatically controlled by
the thermal devices mounted on the transformer.
When specified the “Manual-Off-Auto” type fans switch is
provided. When the switch is in the “Manual” position, the
fans will operate continuously. When the switch is in the
“Off” position, the fans will not operate. When the switch
is in the “Auto” position, the fans will be automatically
controlled by the thermal devices mounted on the
transformer.
The fan motors are normally provided with thermal
overload protection. However, if the fans are designed for
hazardous locations, protection may be provided in the
control cabinet. Refer to the wiring diagram for specifics.
The fan motors have permanently sealed ball bearings
and require no additional lubrication. When assembled,
fan motors are provided with drain plugs installed for
proper orientation. Visually inspect plug placement to
ensure that plugs are correct per fan manufacturer’s
recommendations.
Page 6

9.12 Current Transformers (C.T.’s)
WARNING: CURRENT TRANSFORMERS
SECONDARIES MUST BE CONNECTED TO
A LOAD OR SHORT CIRCUITED TO AVOID
DAMAGING VOLTAGES AT THE TERMINALS.
FAILURE TO MAKE THESE CONNECTIONS
COULD RESUILT IN SEVERE PSERONAL INJURY,
DEATH OR PROPERTY DAMAGE.
For safety, shorting pins are installed in the terminal block
for current transformers. Only remove the shorting pins
after making final connections. Refer to wiring diagram for
specific details.
10.0 MAINTENANCE
A periodic visual inspection of the transformer is
recommended. At such times, the general condition of the
following should be noted:
A. High voltage bushings.
B. Low voltage bushings.
C. Arresters (if provided).
D. Enclosure integrity (hinges, locking provisions,
corrosion, etc.)
E. Evidence of oil leakage.
F. Ground connections.
G. Accessories.
H. Safety labels.
I. Transformer tilt.
WARNING: WHEN BROKEN PARTS, LEAKING
OIL OR OTHER POTENTIALLY HAZARDOUS
CONDITIONS ARE OBSERVED, REMOVE THE
TRANSFORMER FROM SERVICE UNTIL REPAIRS
CAN BE COMPLETED. FAILURE TO DO SO CAN
CAUSE SEVERE INJURY, DEATH OR PROPERTY
DAMAGE.
Where tanks show evidence of rusting or deterioration
of the finish, they may be cleaned and then retouched
with paint available for that purpose. When bare metal is
exposed, a primer should initially be applied, then touch up
paint applied.
A periodic check of the load should be made to ensure
that the transformer is not being subjected to excessive
overload. Planned overloading should be in accordance
with the ANSI Loading Guide (C57.91).
When adding oil to the transformer, the owner should take
the necessary precautions so that PCB contamination is
not introduced.
WARNING: OIL SAMPLES SHOULD BE TAKEN
FROM THE TRANSFORMER ONLY AFTER DE-
ENERGIZING AND MANUALLY VENTING THE
TRANSFORMER. FAILURE TO DO SO CAN
CAUSE SEVERE INJURY, DEATH OR PROPERTY
DAMAGE.
Whenever replacement parts or information regarding
existing transformers are required, COMPLETE
NAMEPLATE data including KVA rating, STYLE NUMBER,
SERIAL NUMBER , and a DESCRIPTION of the part
should be given to ABB,Inc.
11.0 REPAIR
WARNING: BEFORE ATTEMPTING REPAIRS,
DE-ENERGIZE AND VENT THE TRANSFORMER.
FAILURE TO DO SO CAN CAUSE SEVERE INJURY,
DEATH, OR PROPERTY DAMAGE.
It is the responsibility of the owner to inspect, maintain and
keep the transformer in good repair.
Report all failures during the warranty period to your ABB
Sales Office. All warranty repairs must be made by ABB or
an approved service facility.
To assure proper operation, use only ABB approved
replacement parts.
It is recommended that the owner limit repairs to replacing
broken parts unless the owner has well - trained repair
personnel.
Some internal parts can be replaced without completely
draining the tank. In such cases, only the fluid necessary
to expose the part should be drained. There may also be
occasions when complete draining of the transformer tank
will be necessary.
The core and coil assembly can be repaired or replaced
by ABB personnel at either the factory or at an authorized
repair facility. Contact ABB, Inc. for details.
Page 7

Page 8
ABB Inc.
Distribution Transformers Jefferson City, MO
ISO 9001 Certified
3A24511H01
January 2008
DISCLAIMER OF WARRANTIES
AND LIMITATION OF LIABILITY
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, REPRESENTATIONS OR WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING WARRANTIES OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OTHER
THAN THOSE SPECIFICALLY SET OUT BY ANY EXISTING CONTRACT BETWEEN THE PARTIES. ANY SUCH
CONTRACT STATES THE ENTIRE OBLIGATION OF SELLER. THE CONTENTS OF THIS DOCUMENT SHALL NOT
BECOME PART OF OR MODIFY ANY PRIOR OR EXISTING AGREEMENT, COMMITMENT OR RELATIONSHIP.
The information, recommendations, descriptions and safety notations in this document are based on ABB’s experience
and judgment with respect to transformers. THIS INFORMATION SHOULD NOT BE CONSIDERED TO BE ALL
INCLUSIVE OR COVERING ALL CONTINGENCIES.
NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR
PURPOSE OR MERCHANTABILITY, OR WARRANTIESARISING FROM COURSE OF DEALING OR USAGE OF TRADE,
ARE MADE REGARDING THE INFORMATION, RECOMMENDATIONS, DESCRIPTIONS AND SAFETY NOTATIONS
CONTAINED HEREIN. In no event will ABB be responsible to the user in contract, in tort (including negligence), strict
liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever including but not
limited to damage to or loss of use of equipment, plant or power system, cost of capital, loss of profits or revenues, cost of
replacement power, additional expenses in the use of existing power facilities, or claims against the user by its customers
resulting from the use of the information, recommendations, descriptions and safety notations contained herein.