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TEKON ENERGY Co - A DOBLE Authorised Provider,Turkey
DOBLE ENGINEERING CO. BOSTON MA
DOBLE Materials Laboratory
TEKON ENERGY
is cooperating with the DOBLE Materials Laboratory, established in
1933, is staffed by dedicated, experienced chemists, and supported by
engineering personnel knowledgeable in apparatus diagnostics.
TEKON ENERGY
can provide answers and solutions to your problems based upon quality
data from a wide scope of testing capabilities of DOBLE Laboratory and
a rich experience in apparatus diagnostics. We can help you develop the
most cost-effective testing program for condition assessment or help
identify and solve apparatus problems. All test reports include an
analysis of the data and recommendations for remedial action if
warranted.
Testing Capabilities
The DOBLE
Laboratory is fully equipped to perform a wide variety of tests on
insulating materials, with more than fifty tests offered on a routine
basis. All tests can be performed as received or after thermal or
voltage-endurance aging, and under a variety of conditions.
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DOBLE
is experienced in testing apparatus with different waveforms including
lightning and switching impulses, power frequency and D.C.
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DOBLE
can help with specifications for compliance testing, problem detection,
endurance testing, research on dielectric behavior, failure analysis,
and partial discharge detection.
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DOBLE
can also perform accelerated aging and thermal cycling tests on cables
and life endurance testing on stator winding coils.
All test data
is entered into our custom-designed database and reports are created in
Windows® Excel, and are therefore readily transmitted electronically.
Reports can also be supplied in TOA format. Let TEKON ENERGY e help you
to customize a Condition Assessment Program that meets the specific
needs of your system.
DOBLE Laboratories Testing Capabilities Include:
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Dissolved Gas Analysis
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Furanic Compounds In Oil
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Water In Oil Analysis
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Degree of Polymerization
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Oil Quality Screens
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Metals-In-Oil
- Polychlorinated Biphenyls (PCBs)
TEKON ENERJI and DOBLE Laboratory TestingTEKON
ENERJİ provide you with the accurate information you need to
intelligently diagnose any existing and potentially devastating
problems in your liquid-filled equipment by use of the analytical
services performed by DOBLE's Materials Laboratories Compared with the
cost of premature or catastrophic failure, regularly scheduled oil
testing is a cost effective and sound maintenance practice that is used
to extend the life of your transformers and circuit breakers. TEKON
ENERGY can provide testing in the areas listed below in DOBLE
Laboratories. For more information, please contact the TEKON ENERJİ at
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Dissolved Gas Analysis
Dissolved Gas
Analysis is the single most important test performed on oils from
transformers. As the insulating materials in a transformer break down
due to thermal and electrical stresses, gaseous by-products are formed.
The by-products are characteristic of the type of incipient-fault
condition.
Furanic Compounds In Oil
As the
cellulosic insulation in a transformer ages, oil-soluble by-products of
the cellulose chain, called furanic compounds are produced. High
concentrations of 2-furfural, the predominant compound, are a clear
indication of cellulose degradation, as this is the only type of
material in transformers that yields this byproduct. When cellulosic
materials are exposed to extreme temperatures, which results in
charring, furanic compounds can be destroyed and the carbon oxides may
be the only by-products remaining in significant quantities. Experience
is required in evaluating the furanic compound data, as there are
factors such as type of insulation preservation/oil expansion system,
type of conductor wrapped insulation, family of transformer, and
treatment of the oil or the transformer, which can influence the
interpretation. Tests for furanic compounds should be performed
initially for all power transformers to have a baseline, for important
or older transformers, when high carbon oxides are generated, for
highly loaded transformers, and when other tests indicate accelerated
aging.
Water in Oil Analysis
The dielectric breakdown voltage of insulating material is a function
of the water content. The water migrates between the solid and liquid
insulation in a transformer with changes in temperature. The water
content is reported in parts per million and percent of relative
saturation.
Degree of Polymerization
The degree of polymerization (DP) test is another means for assessing
insulation aging. This test is performed on paper samples. The DP test
provides an estimate of the average polymer size of the cellulose
molecules in materials such as paper and pressboard. Generally, paper
in new transformers has a DP of about 1000. Aged paper with a DP of
150-200 has little remaining mechanical strength, and therefore makes
windings more susceptible to mechanical damage during movement,
particularly during extreme events such as through-faults. As
insulation aging in transformers can be uneven due to thermal,
moisture, oxygen, and byproduct concentration gradients samples from
various locations are needed to provide the best diagnosis of the
overall insulation condition.
DP testing in recommended in these cases:
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There is other evidence of very accelerated aging of the insulation
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The transformer is >20 years old and an internal investigation is being performed
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For condition assessment of older transformers for possible refurbishment
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When a partial rewind is being considered
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To assess cause of failure
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For condition assessment of insulation when purchasing a service-aged transformer
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To assess the condition of a transformer after an extreme overheating event.
Oil Quality Screens
Once in
service, the dielectric liquid should be tested periodically to make
sure it retains its important properties such as good dielectric
breakdown voltage, low acidity and no sludge formation. The rate of
deterioration of the insulating oil should be relative slow.
Accelerated aging may indicate an equipment or operating problem. The
DOBLE Laboratory offers a number of Package Screen Tests to suit your
testing needs for new and service-aged insulating liquids. We are
equipped to perform a comprehensive set of purchase specification
tests, such as those for the DOBLE Transformer Oil Purchase
Specification (TOPS) or ASTM D 3487 for new mineral oils. A variety of
Package Screen Tests are available for testing of in-service oils. Let
us help you select the one most appropriate for your equipment and
purposes. We can also tailor a package for your requirements, or
perform individual tests.
Metals-In-Oil
There are two types of metal-in-oil tests commonly done on insulating oil:
Wear Metals:
Pumped cooling systems are susceptible to bearing wear, which when
excessive can create metal particles which are deleterious to the
insulation system. To detect such problems an oil sample is filtered
and the particles are analyzed by atomic absorption spectroscopy for
excessive amounts of copper, lead, zinc, and iron.
Dissolved
Metals: The high temperatures associated with some incipient-fault
conditions will cause the amount of dissolved metals associated with
the problem to increase along with the dissolved gases in oil.
Comparison of the metal-in-oil content with baseline values before the
occurrence of the incipient-fault condition can help locate the source
of the gassing and the problem
Polychlorinated Biphenyls (PCBs)
PCBs are
highly regulated therefore insulating liquids that may contain PCBs
should be tested to ensure proper handling and disposal. Doble offers a
testing service to quickly and accurately quantify the amount and
determine the type of PCBs present in various insulating liquids and
solids or other materials such as soils. The Doble Laboratory is
certified by the State of Massachusetts Department Of Environmental
Protection. Ask about our extensive quality assurance program.
International Customers please note that Federal Regulators prohibit
the importation of oil samples with known PCB. We are unable to accept
in-service oil from oversees that need PCB testing or are known to
contain any detectable quantity.
 An_Oil_Sampling_Instructions.pdf 43.97 Kb
DGA_Sampling.pdf 21.98 Kb
OCB Sampling Form.pdf 97.78 Kb
Transformer/LTC Sample Form.pdf 100.84 Kb
For more information, contact:TEKON ENERGY Co
Cemil Topuzlu Caddesi Uçem Konak Apt 73/1
Caddebostan 34025 Istanbul Turkey
Phone: +90 (216) 411 6741 ; +90 (216) 411 6780
Fax: 90 (216)411 6798
www.tekonenerji.com
Email:
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