Supply Siemens, Tai Xin S11 all copper outdoor box-type transformer Henan Luo Xin Electric

 Transformers (Transformer) is the use of the principle of electromagnetic induction to change the AC voltage device, the main component is the primary coil, the secondary coil and the core (core). The main features are: voltage conversion, the current conversion, impedance transformation, isolation, voltage regulator (magnetic saturation transformer) and the like. It can be divided according to purpose: distribution transformers ,, sealed transformers, modular transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformer, rectifier transformers. 20 entries without basic information module, text lacks the necessary directories or the latest developments, to welcome you to edit entries, get 20 extra points. Contents 1 Introduction 2 Chinese transformer transformer production business conditions 3 4 5 Transformer Works Troubleshooting: 6 Remedy: 7 major categories of basic components 8 9 10 transformers safety procedures constitute 11 Transformer protection 12 Transformer transformer differential protection integrated protection 13 power efficiency transformer 14 transformer protection 15 16 17 intelligent transformer transformer transformer Technical Contacts 1 Introduction 18 2 Chinese transformer production business conditions 3 4 5 Transformer Works Troubleshooting: 6 Remedy: 7 major categories of basic components 8 9 Security 10 power efficiency procedures constitute 11 transformer transformer transformer protection integrated protection 12 13 14 transformer differential protection transformer protection Transformer 16 Transformer 15 17 18 intelligent transformer Technical Contact + 1QQ Sina microblogging Tencent microblogging Baidu Post Bar Everyone watercress Profile Edit this paragraph transformer transformer (Transformer) is to use the principle of electromagnetic induction to change the AC voltage device, the main component is the primary coil, the secondary coil and the core (core). The main features are: voltage conversion, the current conversion, impedance transformation, isolation, voltage regulator (magnetic saturation transformers) such as transformer. It can be divided according to purpose: distribution transformers, sealed transformers, modular transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformer, rectifier transformers. Chinese business conditions transformer edit this section of the transformer manufacturers about 1500. Above 500kV transformer manufacturers nearly 30; 220kV and above enterprises is about 50; 110kV and below production enterprises with certain scale of production enterprises in the statistical range of about 130. The past three years, China's annual output transformer demand were about 1.5 billion kVA. Industry Insights research "transformer market analysis report" shows that our transformer industry capacity of about 30 million kVA, including Shenyang, the West, Conservative Group production capacity of about 500 million kVA. A few years ago, China's electric power construction and development of fast Meng, transformer demand increased rapidly, resulting in a considerable part of the domestic transformer companies to quickly expand production capacity, even individual companies to double production capacity. Since 2009, the state power construction slowed, the domestic demand decreased transformer. In particular, the State Grid Corporation, the Southern Grid Corporation of centralized bidding purchase transformers, low bid which causes an unprecedented fierce competition. Moreover, the domestic market fierce competition, the price below cost, causing some companies began to go overseas routes, exports, foreign factories. Also many companies have begun to develop new, energy-saving, environmentally friendly, intelligent products. However, the domestic transformer companies generally decreased economic benefit, many companies at a loss, or loss of the edge. A large number of distribution transformer business, even the expense of product quality away malicious competition. In addition, the transformer lower-quality product, the accident rate. Distribution Transformer States draw pass rate was 70%. Online transformer run accident rate is rising, resulting in an accident near the transformer products for more than 5 years old, the grid security is threatened. [4] Edit this paragraph with the sustained yield healthy China's rapid economic development, electricity demand continues to grow rapidly. 2011 national total electricity consumption 4.69 trillion kwh, up 11.7 percent over the previous year, consumer demand is still strong. Per capita electricity consumption 3483 kwh, 351 kwh more than last year, more than the world average. China Electric Power Construction of fast Meng development led to the development of China's transformer manufacturing industry. In 2011, production in the country amounted to 1.43 billion kVA transformer, an increase of 6.86%. In 2011, China's transformer manufacturing industries above designated size (the main business income of 2,000 yuan or more) companies have 1461; achieved sales of 290.14 billion yuan, total profit of 16.608 billion yuan, the asset size of 263.84 billion yuan, sales profit of 339.72 billion. Chinese transformer industry competition, foreign multinationals occupy a large market share, the number of domestic transformer manufacturers is also growing rapidly. Such as Shandong Yong Cheng transformer, the transformer low-end market competition, with 220KV transformer production capacity of enterprises have more than 20, with 110KV transformer production capacity of more than 100 enterprises. The production level of more than 500KV transformer enterprises through technology and capacity to build a very high barriers to entry, market structure stabilized. In recent years, China's rapid growth in electricity demand, high-speed pulling power grid construction market demand for power transmission equipment. Electrical transformers as a key power transmission equipment, market demand also maintained a steady growth. Prospect Industrial Research Institute released "China's transformer manufacturing industries demand forecasting and investment strategy planning analysis report" shows that in 2013 sales revenue of transformer industry is 368.034 billion yuan, an increase of 16.07%, 2005--2013 years of industry compound annual growth rate of 20.76 %. The number of enterprises of transformer industry is very large, in 2013 the industry has 1650 enterprises, the SMEs will have 1303, accounting for nearly 80% of GDP. Most small business technical strength is not strong, only produce less than 110 low-end products, resulting in the low-end transformer market excess capacity. According to statistics, domestic production of transformer capacity utilization of only 50%. According to the plan, the State Grid will invest "five-second" period of about 2.55 trillion for power grid construction, 1.5 trillion yuan compared to the "Eleventh Five-Year" period, "five" Power investment 68% year on year improved. Breakdown of view, there will be 2.55 trillion 500 billion for UHV power grid investment, 500 billion for investment in the distribution network, in addition to about 1.55 trillion for other voltage levels of investment in power lines. UHV power grid investments, investment UHV about 000 million [1] million. Works Edit this paragraph transformer is converting AC voltage alternating current and impedance of the device, when the primary coil AC current, core (or cores) and then generates an alternating magnetic flux is induced in the secondary coil voltage (or current). The transformer core (or cores) and coils, there are two or more coil windings, wherein the power supply is called the primary coil winding, called the rest of the secondary coil winding. Transformer Fault: Edit this paragraph (1) when the power transformer through electrical outage or evacuation test, often find voltage is not normal, such as two-phase high and one low or instruction phase zero; some put into operation a new three-phase transformer voltage is high, so that part of the electrical equipment due to voltage is too high and burned; (2) high-voltage fuse blows send no power; after (3) Clear to send no power transformer; (4) transformer sound is not normal, such as the issue " creak "or" clap popping "sound; issued in operation such as frogs' jack jack wow wow" sounds like; (5) high-voltage terminal burn, high voltage bushing serious signs of breakage; (6) in the normal cooling case, transformer temperature disorders, and rising; (7) the oil color change over very, carbonaceous appeared in oil; (8) Transformers bellowing sound, airway safety, conservator outward fuel injection, fuel tank and heat pipe deformation, oil spills, oil leakage and the like. Remedy: Edit this paragraph (1) in the new substation, should be installed according to the specifications of high and low voltage fuses. In the transformer operation found a blown fuse should be replaced or stolen; [1] (2) high, the rational allocation of low-voltage fuse: ① capacity above 100kVA transformer to be configured from 2.0 to 3.0 times the rated current fuse ; ② capacity of transformers 100kVA to 1.5 to 2.0 times the rated current fuse; ③ low pressure side of the fuse rated current should be slightly larger selection. (3) to strengthen the work of the electricity load measured at the peak comes with a clamp meter for each distribution transformer load measurements, rationally adjust the load and avoid unbalanced three-phase distribution transformer operation; (4) for 10kV distribution transformer low voltage side voltage at + 7% -10% range, generally do not allow adjustment tap switch. Regulating tap switch to adjust the repair technician test test; (5) regular inspection phase current is balanced or over rated. As a serious imbalance between the three load current, should take timely measures to adjust; (6) Before the advent of the annual storm season; should arrester sent on all distribution transformers, repair and test department for testing, the timely installation after passing the test; (7 ) put into operation before the inspection work should do the following: ① with load, close the switch three times, can not malfunction; ② test with the test button three times, you should correct action; ③ with the test resistor to ground test three times, should be the correct action. (8) regular cleaning of distribution transformer bushing surface dirt, check the casing or without flashover traces, ground is good, whether the grounding wire used off shares, sealing off, breakage, megger grounding resistance not detected > 4Ω. (9) The reason for the transformer oil leakage analysis 1, rubber seals and weld cracking failure of the transformer pads, long welds, and oil-immersed transformer is welded steel plate based on a variety of welding and connections aggregates. A total 31500kVA transformer pads more than 70, total length of nearly 20m around the weld, it may be more leakage pathways. Direct leakage because the rubber seal failure and weld cracking, porosity, slag and so on. 2, sealants member aging, cracking, deformation transformer leakage occurred at the junction, while more than 95% was mainly caused by the sealant member. The quality of the sealant member depends primarily on its oil resistance, oil resistance poor, aging speed is faster, especially at high temperatures, which means faster aging, can easily cause the seals aging, cracking, metamorphism and deformation, as well as failure, resulting in leakage of transformer oil. 3, transformer manufacturing quality transformers in the manufacturing process, tank pads and more long seam welding difficult, welding materials, welding specifications, process, technology will affect the quality of welding, causing air hole, Weld, sealing off phenomenon so that the transformer oil leakage. 4, plate butterfly poor quality transformer another frequent site of leakage in the valve plate at an earlier production of transformers, common plate valve connecting surface using a rough, thin, single seal, is out of product, easy Transformer oil leakage caused.