Jiangsu Sunel

Sunel Transformer Co., LtdBox-type substation shell is made of steel or alloy plate, with a double cover, good heat insulation. The shell and skeleton all embalmed withThe long-term outdoor use conditions. The shape and color harmony with each other and the environment. Easy to install, and the basis of the box-type substation following a tramCable room, while in the low pressure chamber has a manhole into the cable compartment. One phase fuse is blown, the voltage of the low voltage side when the high pressure side to dropMolded automatic air switch protected under voltage or over-current protection will be action, low voltage operation does not occur. From the product cost, European Boxnto this high. Transformer canceled oil pillow, fuel tanks and radiator are exposed to the air, this box becomes known as the American box metaphor for the transformerThe next hanging boxes.Yhe transformer is generally placed in the rear of the room. For the convenience of the user maintenance, replacement and Capacity needs, transformer can easily cabinets pull out or hanging out from the upper. Box-type substation since the transformer is placed within the housing, the favorable factor is the temperature rise can be prevented from direct sunlight generated by the transformer, and also possible to effectively prevent the collision force, impact, and touch sense electrical accident occurs; its disadvantage is that the cooling of the transformer the higher requirements. Box-type substationIndoor installation of high-voltage switchgear independent closed the High Voltage Switchgear

sunel phase-shifting transformer is one of the key components in the unit series high-voltage high-power inverter. The phase-shifting transformer in the inverter from the two key role: First, the electrical isolation role to each inverter power unit independent of each other in order to achieve the voltage superimposed series shift phase method can effectively eliminate 35 harmonics.
Phase shift high-voltage converter transformers, and low voltage power electronic components are generally two ways: First, low voltage components directly series Another method is to use a separate power unit series, known as multi-level high-pressure cell series power inverter devices.

        Epoxy resin cast a brief description of the characteristics of dry-type transformers, epoxy resin, casting, dry-type transformers. especially new sunel resin cast dry-type transformers series loss and noise down to a new level, creating the conditions for more transformer and low-voltage screen placed in the same distribution room.
       Overload capability with the ambient temperature of the dry-type transformers, the load before the overload situation (starting load), transformer insulation heat dissipation and heat time constant and so on, if necessary, to obtain a copy of the production plant dry change over the load curve.

sunel transformer components, including the body (core, windings, insulation, lead), transformer oil, fuel tank and cooling devices, pressure regulating device, protection device (moisture, secure airway, gas relay, storage cabinets and the measuredtemperature devices, etc.) and the bushing. Transformer is to transform the AC voltage, alternating current and impedance of the device, when the primary coil with alternating current, the core (or cores), will produce alternating magnetic flux, so that a voltage is induced in the secondary coil (or current) . Includes two aspects: First, the hysteresis loss, the iron loss of the transformer when the AC current through the transformer, the direction and magnitude of the magnetic field lines of the transformer of silicon steel will change, so that the internal molecular silicon steel sheet mutual friction and emit heat and thus loss part of the energy, which is the hysteresis loss.

Multi Jiangsu sunel power transformers ,oil-immersed transformer, and over the years have occurred in the transformer oil leakage phenomenon, severe leakage not only reduces the life of the transformer, the impact of the system safe and stable operation, but also the economic benefits to society and usersa serious impact.
The quality of the sealant member depends primarily on its oil resistance, oil resistance is poor, the aging rate is faster, especially in the high temperature, its aging rate is faster, can easily cause the seal aging, cracking, metamorphism and deformation, as well as failure, caused by the transformer leakage oil.
Specification, process, and technology will affect the quality of welding, so that the transformer oil leakage caused by the phenomenon of air hole, Weld, Desoldering.

sunel transformer when an alternating current (having a known frequency) when the flow in one set of coils, in another set of coils will be induced depends on two coils of the magnitude of the voltage having the same frequency of the AC voltage, and the induction coupling andthe magnetic cross chain the extent.
The transformer has its experiment, called the test transformer, respectively, can be divided into the majority of users of inflatable, oil-immersed, dry-type test transformer, power plants, power supply bureau and scientific research units to do AC withstand voltage test basic test equipment, by the standards of the State Administration of Quality supervision Bureau, the dielectric strength test specified voltage for a variety of electrical products, electrical components, and insulating material.
Rated power, rated voltage and voltage than the rated frequency, operating temperature level, temperature rise, voltage regulation, insulating properties and moisture resistance, the above parameters for the generally low frequency transformer technology: transformer ratio, the frequency characteristics of the nonlinear distortion, magnetic shielding, electrostatic shielding, efficiency, etc.

sunel three-phase transformers are widely used in various electrical devices and the AC power supply situations, and its high and low voltage windings there are a variety of different coupling modes.
The phase voltage of each phase of the three-phase transformer is the phase winding voltage, and its line voltage is pointing out the terminal voltage, the line voltage U AB is UA and UB voltage phasor difference.
Winding wiring diagram with the same name as the end of the three-phase transformer, determine the method of linking groups of the transformer is: respectively draw high voltage primary side voltage winding and low voltage (secondary) winding phasor diagram, U AB by the high voltage winding and low voltage windings U ab phase relationship to determine the label linking groups of the transformer.

            sunel sealed transformer is In S7, SZ7, S9 series the variable instrument product design experience based on the increased product functionality and improve the level of products, improve product reliability first place, using the new components, new materials, newthe whole structure, and improve the local structure to improve the strength of the electrical, mechanical strength and heat capacity, corrugated tank, fully sealed structure, transformer oil and the air is completely isolated, and to extend the service life of the transformer oil, and to reduce the maintenance workload of transformer.
Hermetically sealed transformer are fitted with a pressure relief valve safety protection, and to expand the scope of application of the pressure relief valve, and increase effective security.

The function of the power transformer is a power transformer, voltage conversion and the insulating spacer, and power electronics technology in the power supply technology, widely used as a major soft magnetic electromagnetic member.
China’s home appliance market is typical of the Red Sea market, completely rely on accessories for-profit enterprise can not be a real strength of the enterprise, the only accessories collection ability of enterprises, it may win the biggest profit, before they may develop long-term, and accessories companies need to strengthen the development of new products to enhance the design capacity, improve product quality, innovation and seek continued profit.
New energy subsidy policies have been put forward, small appliances because of the low value of a single product, update frequency, fast, failed to share this policy envelopes, small household appliance market is to compete for market differentiation.