We usually use transformers at home. If there is no electricity at home, is it troublesome, so we can't live without it? So what is a transformer? For electricity, it is also inseparable from the transformer. Next, let's take a look: What are its advantages and functions? Do you have any skills? There are several points to note: Tips: Methods/Steps 1 What is a transformer A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer) and so on. It can be divided into distribution transformer, power transformer, fully sealed transformer, combined transformer, dry transformer, oil-immersed transformer, single-phase transformer, electric furnace transformer, rectifier transformer and so on. Operation and maintenance of transformer 1. Prevent overload operation of transformer: Long-term overload operation will cause coil heating, gradually aging insulation, short circuit between boxes, short circuit between phases or short circuit to ground, and oil decomposition. 2. Ensure the quality of insulating oil: In the process of storage, transportation or operation and maintenance of transformer insulating oil, if the oil quality is poor or there are too many impurities and moisture, the insulation strength will be reduced. When the insulation strength is reduced to a certain value, the transformer will be short-circuited, causing sparks, arcs or dangerous temperatures. Therefore, the oil quality of the transformer in operation should be tested regularly, and the unqualified oil should be replaced in time. 3. Prevent transformer iron core insulation from aging and damage: Iron core insulation aging or clamping bolt sleeve damage will cause great eddy current in the iron core, resulting in long-term heating and insulation aging of the iron core. 4. Prevent the insulation from being damaged by maintenance: When the transformer is overhauling the hanging core, attention should be paid to protecting the coil or insulating sleeve, and if scratches are found, they should be handled in time. 5. Ensure good wire contact: poor contact of internal joints of coils, poor contact of connecting points between coils, poor connection to high and low voltage side bushings and poor contact of upper fulcrum of tap changer will all cause local overheating, insulation damage and short circuit or open circuit. At this time, the high-temperature arc will decompose insulating oil and produce a lot of gas, which will increase the pressure in the transformer. When the pressure exceeds the protection setting value of the gas circuit breaker without tripping, an explosion will occur. 6. Anti-electric shock: The power supply of power transformer generally comes from overhead lines, which is vulnerable to lightning strike, and the transformer will be burned due to insulation breakdown. 7. Reliable short-circuit protection: If the transformer coil or load is short-circuited, the transformer will bear considerable short-circuit current. If the protection system fails or the protection setting value is too large, it may burn out the transformer. Therefore, a reliable short-circuit protection device must be installed. 8. Maintain good grounding: For the low-voltage system with protective grounding, the neutral point on the low-voltage side of the transformer should be directly grounded. When the three-phase load is unbalanced, current will appear on the neutral line. When this current is too large and the contact resistance is high, high temperature will appear at the grounding point, igniting the surrounding combustible substances. 9. Prevent overtemperature: The temperature change should be monitored when the transformer is running. If the conductor of transformer coil is Class A insulation, its insulation is mainly paper and cotton yarn, and the temperature has a great influence on insulation and service life. Therefore, when the transformer is running, good ventilation and cooling must be maintained, and forced ventilation can be used when necessary to reduce the temperature rise of the transformer. What are the types of transformers? As far as I know, the model of transformer consists of: number of transformer windings+number of phases+cooling mode+forced oil circulation+on-load or off-load voltage regulation+design serial number+"-"+capacity+rated voltage of high voltage side. For example, sfpz 9-120000/10 refers to three-phase (two-winding transformer omits the number of windings, if it is three-winding, it is preceded by S), the design number is 9, the capacity is 120000KVA, and the rated voltage on the high-voltage side is 65430. Classification of transformer: 1. According to the cooling methods, there are natural cooling, air cooling, water cooling, forced oil circulation air (water) cooling and water cooling. 2. According to the moistureproof methods, it can be divided into open transformers, encapsulated transformers and sealed transformers. 3. According to the core or coil structure: core transformer (plug-in core, C-core and ferrite core), shell transformer (plug-in core, C-core and ferrite core), ring transformer, metal foil transformer and radial transformer. 4. According to the number of power phases: single-phase transformer, three-phase transformer and multi-phase transformer. 5. Classification by use: there are power transformers, special transformers (electric furnace transformers, rectifier transformers, power frequency test transformers, voltage regulators, mine transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impulse transformers, instrument transformers, electronic transformers, reactors, transformers, etc. ) .6. According to the classification of cooling media, there are dry-type transformers, liquid (oil) immersed transformers and inflatable transformers. 7. According to the number of coils, there are autotransformers, double windings, triple windings and multi-winding transformers. 8. According to the conductive materials, there are copper wire transformers, aluminum wire transformers, semi-copper, semi-aluminum and superconducting transformers. 9. According to the voltage regulation mode, it can be divided into non-excitation voltage regulating transformer and on-load voltage regulating transformer. 10. According to the level of neutral point insulation, there are fully insulated transformers and semi-insulated (graded insulation) transformers. If I haven't touched the transformer before, I don't know what happened, because I haven't studied it carefully. Now, I may know something. After all, this transformer will be more acceptable if it knows some basic knowledge of electrician. In fact, it is about some types of transformers to share, hoping to help you! Dear recognition is my greatest motivation! If you think it's good, you like it!