Electrical Technology Q&A (1.1)
What is the basic content of Kirchhoff's law?
2. What is skin effect?
3. What are the concepts and characteristics of parallel resonance?
4. How are eddies created? What is eddy current loss?
5.What is the transition process? What causes the transition process?
6. What is the superposition principle?

Box transformer is the integration of high and low voltage primary equipment, transformer, secondary equipment in the factory in a double layer, sealed, anticorrosive, movable outdoor box.
Box type substation, also known as preinstalled substation or preinstalled substation. Is a kind of high voltage switch equipment, distribution transformers and low voltage power distribution equipment, according to the wiring scheme must be arranged in one of the factory indoor, outdoor compact type distribution equipment, the step-down transformer, low voltage power distribution, and other functions organically combined together, installed in a moisture, rust, dust, rat, fire prevention, guard against theft, heat insulation, fully enclosed, movable steel box, Especially suitable for urban network construction and transformation, it is a new substation after the rise of civil substation. Box-type substation is suitable for mines, factories, oil and gas fields and wind power stations. It replaces the original civil power distribution room and power distribution station and becomes a new complete set of transformer and distribution devices.