Product DescriptionOur Factory produce voltage rating 500kV and
below, capacity rating 1000MVA and below series oil immersed power
transformers. Through optimization and innovation, we have
successfully produced a series of power transformers with low
noise, low loss, low partial discharge and high short-circuit
resistance. The power transformer has adopted a series of major
reforms in materials, processes and structures, featuring small
size, light weight, high efficiency, low loss, low noise and
reliable operation, which can reduce a large number of power grid
losses and operating costs and achieve remarkable economic
benefits. Applicable to power plants, substations, large factories
and mining enterprises, etc. This product complies with national
standards: Power Transformers Part 1 General Rules (GB1094.1-2013),
Power Transformers Part 2 Temperature Rise (GB1094.2-2013), Power
Transformers Part 3 Insulation Levels, Insulation Tests and
External Insulation Air Clearances (GB1094.3-2003), Power
Transformers Part 5 Short Circuit Resistance
(GB1094.5-2003)220/330/500kV transformers are high voltage
oil-immersed transformers with a heart structure. According to the
number of phases can be divided into single-phase transformers,
three-phase transformers; according to the regulating method can be
divided into on-load regulating, non-excitation regulating;
according to the winding coupling method can be divided into power
transformers, autotransformers; according to the number of windings
can be divided into double-winding, three-winding, three-winding +
balance winding. Also included are split transformers, combined
transformers and other special types of 220/330/500kV transformers.
The products are designed according to IEC international standards,
IEEE standards and current national standards.Model
DescriptionTechnical parameters and structure dimensionsProduct
structure featuresProduct superiority:1.Low no-load loss, low
no-load current, low noiseThe Laminated core type transformer Adopt
multistage step lapped joint fully-oblique structure, can reducing
magnetic resistance and noise; Its cross section is inscribed
polygon, high fill factor. After high temperature annealing of
eliminating stress, no-load loss is greatly reduced.2.Strong
overload capacityWith oil flow guide control technology, the
quantitative calculation of the oil flow, optimize the structure of
oil circuit, reduce the hot-spot coefficient, to ensure that under
the condition of rigorous overloading load, the winding hot-spot
temperature does not exceed 140 ºC.3.Strong anti-short circuit
abilityBy analyzing and calculating the worst short circuit,
adopting high strength wire and effective support to strengthen the
structure, adjusting the coil distribution to ensure all stress
have enough margin. Self-developed winding technology can make the
coils wind tightly.4.Low partial dischargeStrictly control each
part of the electric field intensity, according to the discharge
requirements, coil winding and internal assembly is in the
dustproof workshop to guarantee the body clean, adopts the high
vacuum oil injection process, effectively control discharge of
product.Structure characteristic:1,Iron core1. 1The iron core
adopts cold-rolled crystal-oriented silicon steel plate 30Z140 with
high quality, low-loss, and notime effect, sheared by Geroge line
and with no burr. 1.2 Iron core adopts pulling board structure, the
upperand down yoke is clamped by board, to form the frame
structure. The iron core adopts advanced laminationprocess, which
effectively controls the no-load loss and electro-magnetic noise.2
Winding2.1 Winding adopts mature structure, which ensure the
reliability of transformer operation.2.2 The insulation power field
intensity between turns shall be controlled no greater than
1.6kV/mm.3,Body3.1 Body adopts mature insulation structure, and
strictly guarantee the main axial insulation margin.3.2 Body mostly
adopt multi-coil whole assembly, processed in constant voltage and
evaporation, which madecoil shrink evenly and with less rebounce,
and enhance the electric strength and mechanical strength.3.3 Adopt
laminating wood board or thermal shaped insulation cardboard.
Pressed tightly with pin, which ensurethe winding is constantly
pressed tightly.4,leading wire4.1 The layout of all leading wire is
reasonable, which guarantees the enough electric distance and
mechanicalstrenth.4.2 All leading wire is cirlulized ,which
guarantee the reliable wild or prize connection.5,Oil tank5.1 Oil
tank adopts structure of flat top, bell jar type, which add the
mechanical strength of oil tank and alsomake the appearance
beautiful and graceful, site installation tend to be more
convenient.5.2 Pipeline with gas relay such as the oil tube and
bushing hoist support on top of oil tank is with hoistgradient, to
facilitate the gas in transformer flow to gas relay.5.3 Vacuum
oiling is adopted, there is no leakage and permanent distortion in
the following test. vac
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