The electrical components featured here include a range of transformers and other devices with specific technical specifications. For instance, some transformers operate at primary voltages of 15 or 20 kV, with secondary voltages between 400 to 433 V between phases and 231 to 250 V phase to neutral. These units often have a rated insulation level of up to 24 kV and offer off-circuit tapping ranges of 2.5% or 5%. Dimensions and capacitance details are not explicitly mentioned in the provided URLs, but these components typically adhere to international standards like IEC and CENELEC. Key features include hermetically sealed designs and anti-corrosive treatments for durability.