The working principle of electronic transformer

polemounted transformers is no regulated switching power supply, it is actually a kind of inverter. First, the AC rectifier into DC, and then use the electronic components to form a high-frequency oscillator to DC into high-frequency AC, through the switching kiosk transformers output voltage required for the secondary rectifier for electrical use. Switching power supply with a small size, light weight, low price, it is widely used in a variety of electrical appliances. According to the high-frequency switch drive different ways, can be divided into self-excited oscillation and he excited type.

Electronic transformer works - application

single phase pole mounted transformers in the traditional lighting applications are common, such as fluorescent lamps, table lamps, energy saving lamps, advertising lights, etc. can almost all use electronic transformers, and the use of electronic transformers, you can save the starter. In LED lighting, the new products are mostly electric transformer substation. Mainly electronic transformer in the transformer function, high efficiency, cost at the end, saving iron copper material, small structure, light weight. Insufficient resistance to pressure and high-current impact resistance than the iron transformer poor.

There may be capacitance between the high-voltage and low-voltage windings of the 11kv single phase transformer, between the low-voltage winding and the core, between the core and the tank wall. Charged transformer winding through the coupling of the capacitor, it will cause the iron core to the (tank wall) to produce a certain floating potential, due to the various metal parts within the dry cast resin transformer and the fuel tank wall ranging from the same, the suspension potential is different, To a certain potential difference, it will on the (tank wall) discharge, a direct result of core insulation damage. Therefore, the transformer core must be reliably grounded.

The main difference between conventional pole transformer no-load operation and load operation is mainly reflected in the secondary coil.
Transformer The principle of using electromagnetic induction to change the AC voltage of the device, the main component is the primary coil, secondary coil and core (core). In electrical equipment and wireless circuits commonly used for lifting voltage, matching impedance, safety isolation. 13.8kv single phase transformer no-load operation, only the consumption of no-load loss, that is, iron loss and stray, it is 6% of the total capacity, load operation is no load loss + load loss, that is, copper loss, is the total consumption of the transformer.

50 kva pole mount transformers are made using a core

50 kva pole mount transformers are made using a core made from laminations of sheet steel stacked and either glued together with resin or banded together with steel straps. Where large numbers of transformers are made to standard designs, a wound C-shaped core is economic to manufacture. A steel strip is wrapped around a former, pressed into shape and then cut into two C-shaped halves, which are re-assembled on the copper windings.
Formerly, distribution transformer

for indoor use would be filled with a polychlorinated biphenyl (PCB) liquid. Because these liquids persist in the environment and have adverse effects on animals, they have been banned. Other fire-resistant liquids such as silicones are used where a liquid-filled transformer must be used indoors. Certain vegetable oils have been applied as transformer oil; these have the advantage of a high fire point and are completely biodegradable in the environment.

50kVA, 6 Way Mobile Power Transformer

The 50kva power transformer, 6 way mobile power source transformer, is housed in a robust, mild steel box section frame which has wheels fixed ot the base for ease of movement. This transformer has the capacity to run eighteen, 60 volt, 2.7kw ceramic heaters from its secondary output supply. The front control panel consists of P159CF mini controllers and energy single phase step voltage regulators

which can be used ot perform pre and post weld heat treatment. Neon indicator lights are fitted to enable the user to see clearly when a channel is in use. It also features an auto/manual switch to allow the use of an external automatic temperature programmer, twelve female panel mounted twistlocks are fitted to enable the triple cable sets to be connected and there are six thermocouple sockets on the front of the unit and additional sockets are also fitted to the rear of the unit. The rear of the unit also features 3 x 110V auxiliary sockets, a ventilation fan, main circuit breaker and both multi plug and single channel connections for use with external programmers.

50 kva pole mount transformer is mounted on an electrical service pole

50 kva pole mount transformer

is mounted on an electrical service pole, usually at the level of the overhead cables but occasionally at ground level. Pole-mounted transformers are the common breadbox transformers used for converting distribution voltage to the 120/240 volt power used by homes and low-volume commercial installations.
50kva transformer is used in extensive rural area. These transformers range from 16 kVA to 100kVA and transform 11,000 to 33,000 volts down to a low voltage of 400 volts. Pole mounted transformers are reasonably small in size and mass so that it is easy to install them on single pole structures, and larger units on two-pole structures, approximately 5 meters above the ground. This makes the transformers inaccessible, reducing the risk of injury to animals and people and minimizing vandalism.

50 kva pole mount transformer is used to step-down distribution voltage to the final voltage used for residential

50 kva pole mount transformer is used to step-down distribution voltage to the final voltage used for residential, industrial, and commercial applications. pole transformers are mounted to a utility pole where service drop wires are run underground or overhead to a customer’s location to supply power. Multiple customers can be serviced from one transformer depending on the load each customer demands. Pole Mount Transformers can be built for 1 Phase or 3 Phase applications.

Basic knowledge of rated capacity of power transformers

The main function of the transformer is to transfer electrical energy, therefore, the 100kva distribution transformer rated capacity is the main parameters of the transformer. The nominal capacity of the transformer is a nominal value of the power of the performance. It is the magnitude of the transmitted energy, expressed in kVA or MVA, and is used to determine the rated value of the temperature rise limit under the specified conditions when the rated voltage is applied to the transformer Current. conventional pole transformer capacity size and voltage level is also closely related. Voltage is low, the capacity is large, the current is large, loss increases; high voltage, capacity, insulation ratio is too large, the transformer size relative increase, therefore, low voltage capacity will be small, high voltage capacity will be large. The rated capacity of the two-winding transformer is the rated capacity of the winding. (Due to the high efficiency of the transformer, usually the rated capacity of the primary and secondary sides is designed to be equal).

Overload Analysis of Power Transformer

Overload normal load and accident over load two cases. Normal overload is in the normal power supply, the user caused by increased power consumption. It will cause the oil immersed distribution transformer temperature rise, causes the transformer insulation to accelerate the aging, the service life reduces, therefore, under normal circumstances does not allow the overload operation. Special circumstances Transformer can be overloaded in a short time, but in winter shall not exceed the rated load of 30% in summer shall not exceed 15% of rated load. In addition, the transformer should be based on the temperature rise and the provisions of the manufacturer to determine the overload capacity of the transformer. When the power system or the user substation accident, in order to ensure the continuous supply of important equipment, it allows the transformer short-term overload operation, that is, accident overload, accident overload will cause the coil temperature exceeds the allowable value, so the insulation in terms of Faster than normal aging conditions. But less chance of accident overload, under normal circumstances the Amorphous Core Transformer is under-load operation, so short-term overload caused by damage to the transformer insulation. The time and the multiples of the accident overload shall be carried out in accordance with the provisions of the manufacturer.

New type transformer special equipment

pad mount transformer production process is characterized by a large number of non-standard special equipment, so the level of its level depends mainly on the level of special equipment used. Product quality assurance, production efficiency, but also through advanced special equipment to achieve. Transformer product upgrading, but also rely on special equipment to support.
80 years of the 20th century, before importing foreign equipment, China's dry power transformers special equipment, the overall level of technology is relatively low, in addition to winding equipment, professional production plant production, the rest of the vast majority of self-made relatively simple equipment.

The Simplest Phase - shifting Method of Transformer

three phase pad mounted transformer The simplest phase-shifting method The simplest phase-shifting method is to use the secondary side of the amount of two-angle connection of the winding, can make the rectifier furnace pulse wave number doubled. For high-power rectifier equipment, the need for more pulse wave number, pulse wave number 18,24,36 applications such as increasing, which must be set in the primary side of the rectifier transformer phase shift phase shift. Phase-shifted winding and the main winding connection in three ways, namely, zigzag, hexagonal and Yanbian triangle. For the electrochemical industry, rectifier transformer voltage range is much larger than the electric furnace transformer, for chemical salt electrolysis, rectifier transformer voltage range is usually 56% - 105%, for aluminum electrolysis, the voltage range is usually 5% - 105%. Commonly used voltage regulation methods such as electric furnace transformer has variable magnetic flux regulator, series single phase step down transformer voltage regulator and auto-regulator voltage regulator. In addition, due to the characteristics of the rectifier element, the rectifier can be directly on the valve side of the rectifier silicon rectifier conduction phase angle, can be adjusted smoothly the average of the rectified voltage, this regulator called phase-controlled voltage regulator. To achieve phase-controlled voltage regulator, the use of crystal valve, the second is the use of self-saturable reactor, self-saturation reactor is basically composed of a core and two windings, one is the working winding, which is connected in series rectifier transformer two The secondary winding and the rectifier between the load current, the other is the DC control winding is provided by another DC power supply DC current, the main principle is the use of non-linear changes in ferromagnetic materials, the work winding reactance value is very large The change. Adjust the DC control current, you can adjust the phase angle α, which adjusts the average rectified voltage.

High-voltage line relay protection for the three-stage:

For high-side side of the 6 ~ 10KV substation main transformer substation, usually equipped with time-limited over-current protection; such as over-current protection action time is greater than 0.5 ~ 0.7s, should also be installed current quick-break protection. amorphous transformer with capacities of 800 KV · A and above and oil-immersed transformers in workshops of 400 KV · A and above shall be equipped with gas protection (also called gas relay protection) according to regulations. Transformers with capacities of 400 KV · A and above shall be fitted with overload protection according to the possible overload conditions when several units are operated in parallel or in a single operation and as a standby power source for other loads. Overload Protection and Gas Protection In the event of a minor fault (known as "light gas"), the signal is acted on, while others, including gas protection, are normally tripped in the event of a serious failure (commonly known as "heavy gas").
For high voltage side of the plant 35KV and above the total transformer substation main on load tap changer transformer, it should be installed over-current protection, current quick-break protection and gas protection; in case of possible overload, also need to install overload protection. However, if a single transformer with a capacity of 10,000 KV · A or more and a transformer operating in parallel with each capacity of 6300 KV · A and above is installed, a pilot differential protection is required to replace the current quick-break protection.

The output of the transformer

With the sustained and healthy development of China's economy, power demand continues to grow rapidly. In 2011, the nation's total electricity consumption of 4.69 trillion kwh, up 11.7% over the previous year, consumer demand is still strong. Per capita electricity consumption of 3483 kwh, an increase of 351 kwh than the previous year, more than the world average.
China's rapid development of power construction led the development of China's substations and transformers manufacturing industry. In 2011, the national transformer production reached 1.43 billion KVA, an increase of 6.86%. In 2011, China's transformer manufacturing industry scale (main business income of more than 20 million yuan) 1461 companies; sales of 291.01 billion yuan, total profit of 16.608 billion yuan, assets of 263.84 billion yuan, the product Sales profit of 33.972 billion yuan.
China's transformer industry is highly competitive, foreign multinational companies to seize a large market share, the number of domestic transformer manufacturers are also rapid growth. In the low-end transformer market is highly competitive, with 220KV pole mounted distribution transformer production capacity of more than 20 enterprises, with 110KV transformer production capacity of more than 100 enterprises. The production of more than 500KV transformer enterprises through technology and capacity to build a very high barriers to entry, the market tends to stabilize the pattern.

Cause of Leakage of Transformer

Leakage caused by two main reasons: one is in the transformer design and manufacturing process latent down; the other is due to the improper installation and maintenance of the pad-mounted transformers caused. Transformer main leakage parts often appear in the radiator interface, flat disc valve cap, casing, porcelain, weld, trachoma, flanges and other parts.
1, out of the air
Out of the air is an invisible form of leakage. For example, the casing head, the oil storage cabinet diaphragm, the airway glass, weld trachoma and steel sand and other parts of the air out of sight are invisible. Over the years, the main power system accidents are mostly winding winding accidents and low-voltage transformer outlet short-circuit the body of the serious damage.
2, the classification of oil leakage
Transformer oil leakage can be divided into two kinds of leakage and leakage, and leakage can be divided into weld seepage and sealing surface leakage of two.
1) Endoleak: The most common internal leakage is the oil in the oil-filled casing and the on-load tap-changer oil in the diverter switch housing leaks into the transformer body.
2) leakage: Leakage is divided into weld seepage and sealing surface leakage of two:
Weld seepage: weld seepage is caused by the existence of trachoma in the welded parts of the steel plate.
Sealing surface leakage: sealing surface leakage is more complex, to specific issues specific analysis. In the single phase step down transformer overhaul or installation process should prevent the sealing surface leakage as an important task.

Dry - type transformer cooling method

conventional type transformer cooling method is divided into natural air cooling (AN) and forced air cooling (AF). Natural air cooling, the transformer can be rated capacity under long-term continuous operation. Forced air cooling, the transformer output capacity can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation. Because overload and load voltage and impedance voltage increase greatly, it is in non-economic operation state, so it should not make it run continuously for a long time.

Transformer voltage is not the same

China's rapid economic development in recent years, the national economy has also developed and powerful. More and more people go out of the country, more and more enterprises to seek foreign development, and constantly develop foreign trade business. Transformer industry is no exception. General transformer exports have some 100kva single phase pole mounted transformer, such as export-specific transformers. Because the voltage standards vary from country to country. The United States and other countries with 120V voltage, electrical protection focus is on fire; and for China and other countries with 220V voltage, electrical protection focus is on electric shock from a theoretical point of view, the higher the voltage, the smaller the loss on the line, The lower the voltage the more secure. So the transformer in the direction of the export we also need to pay attention to its voltage use of the different. Whether small and medium enterprises of the pressure device manufacturers, or large transformer factory. Transformer exports have become part of the daily processing of production. This kind of transformer to provide regulated voltage for the power grid also plays an important role in the daily power grid.

Farady pole mounted distribution transformer

The Farady pole mounted distribution transformer integrates a standard pad-mounted distribution transformer with advanced, passively cooled power electronics and sensors in an overall enclosure optimized for outdoor deployment on standard transformer pads. Install PRTs as a “future ready” part of new residential electrification projects or as a direct replacement of existing distribution transformers to address renewable integration.

Farady Pad-mounted distribution transformer

The Farady 50kva power transformer is a new class of agile grid infrastructure designed to enable a more flexible and resilient distribution network. It provides a comprehensive solution for utilities to reliably deliver high quality power while dynamically controlling voltage, power factor and harmonics. It features combines power delivery and regulation onto a standard pad-mounted distribution transformer.

Farady Distribution transformer has rugged design for durability

Farady distribution transformer has rugged design for durability. It has primary voltage rating of 240/480 Volts and secondary voltage rating of 120/240 Volts at 60 Hz. The 10kva single phase transformer rated at 50 kVA. Isolation transformer windings are made of aluminum. Reverse connectable transformer has temperature rating of 150 deg C. Indoor/Outdoor enclosure transformer has floor/wall-mounting for inspecting connection. Air/dry cooling transformer offers lugs/bolt-down terminal connection.

Farady 100kva power transformers

Farady 100kva power transformers are required for many different furnace processes and applications. It can be designed to withstand repeated short-circuit conditions and high thermal stresses. Distribution transformers operate under very severe conditions with regard to frequent overcurrents and overvoltages generated by short-circuits in the furnace and the operation of the high voltage circuit breaker. The continuous at high utilization. loading is cyclic, while in other applications the loading is more continuous at high utilization.

Farady pole mount transformer Overload Capacity

Utilities are now able to operate china electrical transformer beyond full rated load to at least 109% to more precisely size transformers based on the period of peak demand—without reducing insulation life. Moisture and thermal stress are the enemy of transformer reliability and life. Our Farady 50 kva pole mount transformer have longer life contributes to system reliability performance. The capacity to load transformers continuously at higher temperature and varying loads without causing damage to the transformer contributes to better overall system reliability.

Farady produce power and distribution transformers

Farady 50kva power transformer are key elements of energetic systems which need safety and working durability. Devices produced in Power Engineering S.A. meet these requirements. We guarantee your satisfaction of using our products. On request, we are able to produce power and distribution transformers. Our Engineering Department develops new transformers adjusting their parameters to the requirements of our Customers. Before commissioning the production of documentation, we also make the necessary calculations and tests using the latest computational techniques and in cooperation, so that products meet all customer requirements, quality standards and ensure long trouble-free operation.

Highly efficient Farady distribution transformer

The conventional distribution transformer makes use of highly efficient and energy saving wound core, and our product is mounted on the pole, thereby cutting down the installation size, construction cost and low-voltage power supply radius. As a result, the low voltage line loss is reduced by as much as 60% or more, and the power supply quality is enhanced. Moreover, this device is featured by excellent overload capability, convenient maintenance, continuous and reliable working, etc. Our conventional pole mounted distribution transformer is commonly used in various places including rural areas, remote regions and scattered villages to provide high quality power supply for daily lighting, agricultural production and industrial plants. Aside from these, it is also suitable for the energy saving projects for railway and urban grid.

The Advantage of Farady pole transformer

The conventional pole transformer is equipped with self-sealing pressure relief valve, while the upper and lower hanger brackets which are manufactured by hot rolled steel and are welded to the tank, are in accordance with ANSI standard. The ground connector is ring-type and bolted.In general, every single phase pole mounted transformers of our products adopts self-sealing cylindrical structure, and employs lifting lug, grounding device, pressure relief valve and other components. In addition, there is one or two high voltage bushings on the cover, and the low voltage bushings are mounted on the wall, and eyebolt terminals are applied for the bushings.

Farady high voltage single-phase pole mounted distribution transformer

For the conventional single-phase pole mounted distribution transformer, the high voltage porcelain bushing installed on the top of the cover band is outfitted with eyebolt terminal, and the undercut gasket seats offer better sealing result. The terminal, made from cast bronze and plated with tin, fits for connection to copper or aluminum cable. The Single Phase Transformer one-piece fasten ring achieves different functions, such as extending the service life of our product, facilitating inspection process, maintaining uniform pressure around the entire rim, etc. Meanwhile, it works together with a specially made tank rim, drawn cover and gasket to realize reliable sealing performance.

Farady produce pole mounted distribution transformers

Farady produce pole mounted distribution transformers from 10 to 500kVA. Using design principles based on over 10 years of transformer design experience combined with modern process technologies and design modelling, Farady pole mounted transformer continue to be leaders in their class. Farady pole mounted distribution transformers are manufactured to standard designs, primarily for power utilities or approved service providers. All standard designs have been proven by type testing or evaluation of similar designs, including impulse, short circuit, temperature rise, and sound level.

Farady tailored for your transformer

Through 10 years of experience in the distribution transformers industry, combined with state of the art manufacturing, Farady produces high-quality, low loss, single and three phase pad mounted transformer options. Farady pride ourselves on constructing products that are reliable, efficient and tailored to your needs. Dependable power distribution is one of the most important aspects of consumer demand today, so we ensure that all Farady transformer products provide safe and efficient distribution with minimal maintenance. Through our experience as competitive electrical transformer manufacturers we have developed durable solutions for your power distribution needs.

Farady pole mount transformer is particularly important for industrial applications

All Farady 50 kva pole mount transformer windings are produced using copper conductor. Our materials selection philosophy is: use the highest quality materials in the repair or redesign of equipment. This philosophy enables us to help customers avoid unnecessary losses and maximize the life of their equipment.
Farady transformer has experienced on staff engineers that are capable of converting your polemounted transformer from aluminum windings to copper windings. Copper windings offer advantages in transformer losses and mechanical strength which is particularly important for industrial applications where large motor starting loads are present.

Feature of Farady Pole Mounted transformers

All Farady distribution transformers have a fuse to protect against faults inside the transformer. They are also equipped with an interrupting device. These Transformers are tested to withstand the impulse of lightning. The voltage between the end terminal and the centre tapping will provide 120V while the voltage between two end terminals will be 220 volts. These Single Phase Pole Mounted transformers can also be used to provide three phase LV supply.

Hermetically Sealed Distribution Transformer

Hermetically Sealed Distribution Transformer

Farady offers a complete range of distribution transformers designed to grant the reliability, durability, and efficiency required in utility, industrial, and commercial applications. Farady’s liquid-filled transformers are manufactured in accordance with the most demanding industry and international standards.

http://www.farady-electric.com/hermetically-sealed-distribution-transformer/

Single Phase Pole Mounted Distribution Transformers

Single Phase Pole Mounted Transformers are usually used in rural areas where three phase power may not be required.  These Transformers reduce the voltage from the line voltage 11kV to a single phase voltage usually 230V.The secondary of the pole mounted distribution transformer is usually connected between the two phases of a MV line.  The secondary voltage is a single phase voltage which is fed to the house. These transformers can be easily installed and do not require extensive mounting Structures.

The action of Transformer

A transformer is used to bring voltage up or down in an AC electrical circuit. Farady transformer can be used to convert AC power to DC power. There are transformers all over every house, farady ac power transformer is inside the black plastic case which you plug into the wall to recharge your cell phone or other devices. These types are often called "wall warts". They can be very large, as in national utility systems, or it can be very small embedded inside electronics. It is an essential part of all electronics today.

A power transformer is an electronic component

Farady 50kva power transformer is an electronic component where two (or more) coils share a common magnetic field. A transformer is used to transfer energy from one coil (called the primary) to the other coil (called the secondary).
Farady offers a wide range of pole mounted distribution transformers for a variety of different applications. High voltage power transformer are the main products have many advantage both on quality and price.

Farady transformer products

Farady transformer pride ourselves on constructing products that are reliable, efficient and tailored to your needs. Dependable power distribution is one of the most important aspects of consumer demand today, so we ensure that all transformer products provide safe and efficient distribution with minimal maintenance. Through our experience as competitive electrical power and distribution transformer manufacturers we have developed durable solutions for your power distribution needs.

Farady transformer produces

Through 10 years of experience in the distribution transformers industry, combined with state of the art manufacturing, Farady transformer produces high-quality, low loss, single pole transformer and three phase pole transformer options.Farady is committed to providing our customers with the best possible distribution transformers and associated accessories. We source materials from across the globe ensuring that our products will endure the harsh climates they are exposed to.

Feature of Farady 50 kva pole mount transformer structure

Feature of Farady 50 kva pole mount transformer structure
(1) Cover mounted high voltage auto load booster porcelain bushing with eyebolt terminal are mounted on flat embossments on the cover and have undercut gasket seats for improved sealing. The eyebolt connectors are cast bronze plated with tin to accommodate both aluminum and copper conductors.
(2) One-piece fasten ring prolongs the life of the transformer, facilitates inspection and maintains even pressure around the entire rim. It combines with a specially formed tank rim, drawn cover and gasket to form an effective seal which will not deteriorate with age.
(3) Low voltage tank-wall bushing terminals are clamp type and tinplated.
(4) Tank is equipped with self-sealing pressure release device.
(5) Support lugs, welded to the tank, conform to ANSI standards are made of hot-rolled steel.
(6) Tank is supplied with a tank grounding bolted ring-type connector suitable for use with copper or aluminum.

polemount transformers and regulators

Since 2006, a specialized and dedicated facility in refurbishing pole mounted transformers has been created. The Farady company is equipped with the state-of-the-art technology, sophisticated facilities, ISO9001 quality management system certification and ISO14001 environment certification approval.Farady Company is dedicated to become the biggest name in the international business of farady transformers in China, and contributes its share to the transformation from the Made in China into the Invented in China.