How to buy an electric pole transformer-Daelim
Electric pole transformer is also called pole mounted transformer. This article mainly introduces the definition, type, operation, and application of electric pole transformers. If you have any questions, please feel free to contact me.
Daelim is a manufacturer and distributor specializing in the production of electric pole transformers, with a broad American market. The electric pole transformer manufactured by Beijing Daelim has undergone strict quality inspection from the purchase of accessories to the delivery to ensure that the quality of the transformer meets the manufacturing standards and requirements. Welcome to consult at any time.
What is an electric pole transformer?
An electric pole transformer is a kind of distribution transformer, which is often used in power distribution systems. The rated capacity of the electric pole transformer is usually between 15kVA-167kVA, and the rated voltage is more commonly between 12.47KV, and 13.8KV, which can convert high-voltage current into the low-voltage current to meet the electricity demand of a large number of residents. Because the electric pole transformer has the advantages of small size, easy installation, and beautiful appearance, it is often installed on cement poles or wooden poles. The electric pole transformer installed on the cement pole or wooden pole can avoid the danger caused by the inadvertent touch of people or animals and does not occupy the floor space.
An electric pole transformer is characterized by a ceramic high-voltage double bushing on the primary side (high voltage side) and three bushings on the secondary side (low voltage side). The electric pole transformer is equipped with copper windings and an iron core, consisting of one coil and two iron core loops. Tinned terminals on the primary and secondary sides can be connected with copper or aluminum.
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Electric pole transformer types
There are two basic types of electric pole transformers, the traditional type, and the CSP type. Meanwhile, for the transformer core, 2 types of materials are available: silicon steel sheet-wound core and amorphous metal core. The difference between the CSP-type electric pole transformer and the traditional type electric pole transformer is that the CSP type electric pole transformer is equipped with arresters, fuses, and circuit breakers, which are safer and more reliable. Of course, the price is more expensive than the traditional type of electric pole transformer.
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How do electric pole transformers work?
Like other transformers, the electric pole transformer also works through the principle of electromagnetic induction. The electric pole transformer has a primary coil and a secondary coil. After the primary coil is energized, the iron core in the transformer will generate a secondary length, and the secondary coil will generate an induced electromotive force, thus realizing the voltage change.
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What are the main components of an electric pole transformer?
The main materials of the main body of an electric pole transformer include magnetic circuit materials, circuit materials, insulating materials, structural materials, etc. the specific material uses and categories include:
Silicon steel sheet
In the transformer, the main requirements for the performance of silicon steel are:
① Low iron loss, which is the most important index of silicon steel sheet quality. Each country divides the brand according to the iron loss value. The lower the iron loss, the higher the brand.
② The magnetic induction strength (magnetic induction) is high under a strong magnetic field, which reduces the volume and weight of the iron core of the motor and transformer, and saves silicon steel sheets, copper wires, and insulating materials.
③ The surface is smooth and flat and the thickness is uniform, which can improve the filling coefficient of the core.
④ Good punching property and easy processing.
⑤ The surface insulating film has good adhesion and weldability, which can prevent corrosion and improve the punching property.
⑥ Basically no magnetic aging.
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Amorphous alloy core
Amorphous alloy material is a new type of alloy material developed in the 1970s. It uses internationally advanced ultra-rapid cooling technology to directly cool the liquid metal at a cooling rate of 106 ℃ / s to form a solid thin strip with a 0.02-0.03mm thickness. It has been solidified before it can crystallize. The alloy material is similar to glass, with an irregular atomic arrangement and no crystal structure characterized by metal. Its basic elements are iron (FE), nickel (Ni), cobalt (CO), silicon (SI), boron (b), carbon (c), etc. The material has the following
Circuit materials
The internal circuit of the electric pole transformer is mainly composed of windings (also called coils), which are directly connected to the external power grid and are the core components of the transformer. The internal circuit of the transformer is usually composed of wire windings. The wire (electromagnetic wire) is divided into copper wire and aluminum wire according to the material and is divided into round wire, flat wire (also divided into a single wire, combined wire, and transposed wire), foil conductor according to the cross-sectional shape of the wire, The cables are covered with different types of insulation layers to form an integral coil. Therefore, the main conductor materials of the transformer circuit are copper and aluminum.
Insulation materials
The reliability and service life of an electric pole transformer depends on the insulating materials used to a great extent. Insulating materials, also known as dielectrics, are substances with high resistance coefficients and low conductivity. Under the action of DC voltage, only a very small current can pass through the insulating material. Its resistance coefficient.
The higher the resistivity of the insulating material, the better its insulation performance.
The insulating material is used in the transformer to isolate the conductive parts from each other and the conductive parts from the ground (zero potential). When used for various supports, it should also have good mechanical properties. In addition, the insulating material also plays other roles, such as cooling, fixing, energy storage, arc extinguishing, improving potential gradient, moisture-proof, mold-proof, and conductor protection.
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Electric pole transformer applications
Because of its low cost, small size, and easy installation, an electric pole transformer is mainly used in rural areas and remote towns to light local lights and bring light in the dark. Electric pole transformers can also be seen everywhere in urban communities. It is often installed above electric poles, so it is easy to be ignored.
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How to install an electric pole transformer?
1. It is necessary to ensure that the installation of the cross arm of each layer of the bench fully meets the requirements of the safe distance, and no error is allowed.
2. The high-voltage Lead shall be prepared in advance, and the problems of uneven stress, loose connection, and straight and broken bending shall be avoided during installation. The three-phase arc shall be kept consistent to avoid stress on the terminal.
3. Place the transformer 3.4m above the ground and fix it on the bracket with back iron angle steel, so that the fuse and the high-voltage outgoing line of the transformer are on the same straight line.
4. In the selection of the installation mode of the low-voltage integrated distribution box, we should choose the hoisting, that is, the hanging installation mode we often say. When installing, the lowest edge of the distribution box should be higher than 1.9m, and use relevant tools to fix it on the transformer support.
5. The cross arms used in the whole process are basically single cross arms, including lightning arrester cross arms and lead wire cross arms. In addition, the drop-type fuse, lightning arrester, and transformer terminal shall be equipped with an insulation shield of the same color as the phase sequence.
6. When the grounding wire is operated, the lower end of the drop-type fuse should not be stressed, and the electrical inspection grounding ring should be installed on the high-voltage line between the drop-type fuse and the lightning arrester
7. You can use the side appearance method to connect the low-voltage cable.
8. The platform grounding network is a closed ring, with a length and width of more than 5000 mm, a pit depth of more than 800 mm, and a width of 400 mm. After backfilling, the trench shall be filled with oil to prevent sinking. The height of this soil layer shall be between 100 mm and 300 mm.
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Cause and harm of loud sound in electric pole transformer operation
The reasons for the loud vibration of the transformer are as follows:
1. Severe overload of the transformer (overload operation)
2. The input and output voltage exceeds 10% of the rated voltage
3. The transformer is not installed correctly and fixed firmly
4. There is a problem with the design of the transformer itself
5. There is a problem with the load parameter matching of the transformer
6. Problems occurred in the production process of the transformer
Excessive noise is very harmful to the human body, which is a long-term and chronic injury. If there is such noise for a long time, it will cause damage to human ears. In addition, the service life of the transformer will be greatly reduced.
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Pole-mounted transformer manufacturers
Daelim is a professional transformer manufacturer and distributor located in Beijing, China. Daelim manufactures various types of transformers, such as electric pole transformers, pad-mounted transformers, substation transformers, power transformers, dry-type transformers, etc. The transformers manufactured by Daelim are exported to the United States, Canada, Australia, the Philippines, and other countries, and provide good after-sales service to ensure that customers have no worries. If you need any transformer, please feel free to contact me.
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What do you need to know about power pole transformer ?
Power pole transformer refers to a power transformer installed on a wooden pole or a concrete pole. Power pole transformer is often used to reduce the voltage of distribution level to the consumption level, with the purpose of supplying power to nearby residential areas or residential areas.