What’s the Operation Steps for Transformer Start-Up？ (1) For transformers using forced oil circulation, the cooling system should be activated before commissioning. In the case of forced oil circulation water-cooled transformers, the oil system must be activated first, followed by the water system. After discontinuing the water cooling system in winter, the water should be completely […]
In an interleaved manner, how is the leakage flux of the winding distributed, and what kind of electromagnetic force is generated? In the case of a winding arranged in an interleaved manner, the distribution of leakage flux is different from the concentric arrangement mentioned earlier. The predominant type of leakage flux generated in this arrangement
In concentric arrangement, how is the distribution of leakage flux in the windings and the resulting electromagnetic forces explained? For double-winding concentric arrangement, the leakage flux is generally smaller than in a single concentric arrangement, and it is even further reduced in multi-winding concentric arrangements. Let’s take the example of a double-winding single concentric arrangement
What is the main magnetic flux? What is the leakage magnetic flux? When a winding in a transformer is connected to a power source, it generates a magnetic flux in the core. The magnetic flux generated in the core due to the excitation voltage is called the main magnetic flux, and its magnitude depends on
What are the different winding arrangements for transformers? The winding arrangement of a transformer refers to the placement positions of each phase and each coil within the winding. When selecting the winding arrangement, factors such as impedance voltage, convenient lead-out, and a rational insulation structure are considered. Currently, there are two main winding arrangements: concentric
What is the winding direction of a winding? The winding direction of a winding is closely related to the direction of the magnetic field generated by the current in the winding and the direction of the induced electromotive force in the winding when the magnetic field changes. The winding direction can be divided into two
What is the Voltage Ratio? The voltage ratio indicated on the nameplate of a transformer refers to the voltage ratio of the transformer under no-load conditions. It serves as a parameter used by the manufacturing factory to assess whether the number of turns in the winding meets the specified requirements. The actual voltage ratio during
What is the rearrangement of parallel conductors? After the passage of current through conductors, in addition to resistive losses, there is also eddy current loss. Regarding resistive losses, whether the winding is made with a single conductor or multiple parallel conductors, as long as the cross-sectional area and length are the same, resistive losses remain
What role does the winding play in a transformer? And how is the winding classified? The winding refers to the constituent part of the transformer circuit, made of copper or aluminum conductors with high electrical conductivity. Its design requires sufficient insulation strength, mechanical strength, and heat resistance. Typically, windings are classified into two types: layer-type
Why does excitation inrush current occur when a transformer is energized with no load? When a transformer is energized with no load, the excitation current immediately undergoes a transient phase, and its peak value may exceed several times the rated load current. Compared to the normal excitation current, the steady-state no-load current of the transformer
