This page focuses on transformer construction and various voltage levels in electrical systems. It provides a detailed diagram showing primary and secondary windings along with magnetic flux patterns.

Definition: A transformer is a device that transfers electrical energy between two circuits through electromagnetic induction.

Vocabulary: Phase-to-phase voltage refers to the potential difference between any two phase conductors.

Example: The voltage levels shown include:

• 400V between phases $L1-L2, L2-L3, L3-L1$
• 230V between phase and neutral
• 0V reference level

Highlight: The transformer diagram clearly shows the relationship between input and output parameters, including current and voltage transformations.

The page illustrates the complete voltage distribution system from three-phase to single-phase configurations, with detailed labeling of all components and connections.

This page introduces the basic electrical quantities and power supply components. The content explains how electrical current flows through conductors and the relationship between current, voltage, and resistance.

Definition: Strom (Current) is defined as the directed movement of electrons through a conductor.

Vocabulary: Spannung (Voltage) results from charge separation, while Widerstand (Resistance) acts to impede current flow.

Example: A power supply unit converts 230V AC to a lower DC voltage, demonstrating voltage transformation and rectification.

Highlight: The technical current direction is conventionally defined from positive to negative $+ to -$.

The page also details the essential components of a power supply unit, including:

• Power switch and display
• Transformer
• Rectifier
• Capacitor for smoothing
• Voltage stabilization circuit