The primary and secondary coils are two fundamental components of a transformer, enabling the transmission and transformation of electrical energy through the principle of electromagnetic induction. The primary coil receives high-voltage current from the input source and generates a varying magnetic field, while the secondary coil, influenced by this magnetic field, produces a corresponding output voltage. Their interaction allows the transformer to perform voltage conversion, facilitating effic

Power transformers can be classified into several categories based on their purpose, structure, and other characteristics:According to purpose:Step-up transformer:Increases voltage from low to high levels, enabling efficient long-distance power transmission.Step-down transformer:Decreases voltage from high to low levels, supplying power to local or nearby loads through distribution networks.According to phase number:Single-phase transformerThree-phase transformerAccording to winding arrangement:

Transformer Main Body Construction and Safety Protection DevicesA power transformer is equipped with several critical safety protection devices to ensure reliable and safe operation. These components play essential roles in monitoring, protecting, and maintaining the integrity of the transformer under varying operating conditions.1. Oil Cushion (Conservator Tank)The oil cushion, also known as the conservator tank, typically has a capacity of approximately 8–10% of the total transformer oil

Transformer voltage regulation can be achieved through on-load tap changing (OLTC) and off-load tap changing:On-load voltage regulation allows the transformer to adjust its tap position while in operation, thereby changing the turns ratio to regulate voltage. There are two methods: line-end regulation and neutral-point regulation. Line-end regulation involves placing the tap on the line end of the high-voltage winding, whereas neutral-point regulation places the tap on the neutral end of the hig

The power transformer is a key component in power plants and substations. Its functions are diverse: it can step up voltage to transmit electrical energy over long distances to load centers, as well as step down voltage to various required levels to meet different power demands. In short, both voltage step-up and step-down processes are accomplished through transformers.In power system transmission, voltage and power losses are inevitable. When transmitting a constant amount of power, voltage dr

1. Abnormal Temperature Rise of the TransformerWhen the transformer's oil temperature or coil temperature exceeds the allowable value during operation, the following steps should be taken to identify the cause and take measures to reduce the temperature:Check the oil temperature and coil temperature that should be present under the load and cooling medium temperature.Check if the temperature displayed on the CRT of the transformer is normal.Check if the cooling device is functioning properly, an

Main TransformerThe main transformer is primarily responsible for converting the high-voltage electrical energy generated at power plants into lower-voltage electrical energy suitable for transmission, distribution, and end-use. This process involves stepping down voltage from high to low levels.Working PrincipleThe main transformer operates based on the principles of electromagnetic induction and voltage transformation. When an alternating current (AC) is applied to the high-voltage winding, it

In electrical power systems, a bushing is an insulating device that allows an electrical conductor to pass safely through a grounded conductive barrier, as in the case of transformers or circuit breakers. All transformer windings are connected to high-voltage lines, so special attention must be paid to the terminal connections to prevent flashover between the high-voltage terminals and the transformer body. In low-voltage distribution transformers, cable connections are made within a terminal bo

Working Principle of Rectifier TransformersThe working principle of a rectifier transformer is the same as that of a conventional transformer. A transformer is a device that converts AC voltage based on the principle of electromagnetic induction. Typically, a transformer consists of two electrically isolated windings—the primary and secondary—wound around a common iron core. When the primary winding is connected to an AC power source, the alternating current generates a magnetomotive

1.Common Faults and Diagnostic Measures1.1 Transformer Oil Leakage1.1.1 Oil Leakage from Tank Weld SeamsFor oil leakage at flat joints, direct welding is applicable. For leakage at corners or joints reinforced with stiffeners, the exact leakage point is often difficult to locate, and re-leakage may occur after welding due to internal stress. For such cases, repair welding with an added iron plate is recommended: for two-surface joints, the iron plate can be cut into a spindle shape for welding;