Distribution transformer calculations – MS Excel Spreadsheet
04/12/2025
Four Fast Transformer Calculations
Calculating the prospective short - circuit current on the low - voltage side of the transformer
Calculating the sizes of natural ventilation openings required for the transformer room.
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Research on Bridge-Type Fault Current Limiters
1 Bridge-Type Superconducting Fault Current Limiter1.1 Structure and Operating Principle of the Bridge-Type SFCLFigure 1 shows the single-phase circuit diagram of the bridge-type SFCL, which consists of four diodes D₁ to D₄, a DC bias voltage source V_b, and a superconducting coil L. A circuit breaker CB is connected in series with the limiter to interrupt the fault current after it has been limited. The bias source V_b provides a bias current i_b to the superconducting coil L. The voltage of V_
08/25/2025
What should be paid attention to in the design of low-voltage pole-mounted circuit breakers?
Low-voltage pole-mounted circuit breakers are critical protective and control devices in power systems, whose design and operation directly affect system safety and reliability. Their design must comprehensively address environmental adaptability, electrical parameter coordination, and actuator selection to ensure stable operation under diverse conditions. During operation, strict adherence to safety protocols, regular maintenance, and proper handling of exceptional situations are essential to p
08/21/2025
Study on Steep - Wave Breakdown Characteristics of Hybrid Porcelain Insulators
Porcelain and glass insulators exhibit excellent insulation performance and mechanical strength, but are prone to pollution flashover under severe contamination, threatening the stable operation of power grids. To enhance the pollution flashover resistance of external insulation, manufacturers commonly apply room-temperature vulcanized silicone rubber (RTV) coatings with superior hydrophobicity and hydrophobicity transfer properties onto insulator surfaces, thereby reducing flashover risks. Init
08/20/2025
Research on Energy - Saving Effect of Inverter Speed Regulation Technology in Electrical Automation
As the core of industrial production, electrical automation systems directly influence overall production costs and environmental impact. Traditional constant-speed operation often leads to energy waste when responding to varying load demands and makes precise process control difficult to achieve. Variable frequency speed regulation technology, as an advanced motor control method, offers a promising solution to these issues. This study takes the electrical automation system of a power plant as a
08/18/2025
