Transformers – also known as Trafo for short – are used to convert alternating current (AC). The input voltage (e.g., 230V) is applied to the primary coil, while an AC voltage with a different voltage level (e.g., 24V) is tapped from the secondary coil. The ratio between the input and output voltage corresponds to the turns ratio between the primary and secondary coils. ProConnecting lists single-phase transformers from Breve. The AC/AC transformers of the Breve STM series are ideal for use in various electrical installations. With apparent power ratings of up to 2,500VA (e.g., 63VA, 250VA, 500VA), they can also supply power-hungry consumers. The Breve STM AC/AC transformers are also designed according to protection class I, protection type IP00, insulation class B (130°C), and the standards EN 61588-24 and EN 61558-2-6. However, if halogen lamps are to be operated, the compact AC/AC transformers of the Breve TTH series are recommended. ProConnecting offers these special transformers in apparent power ratings such as 50VA, 105VA, and 150VA. On the primary side, the Breve transformers are compatible with the 230V 50/60Hz mains voltage, outputting an 11.5V AC voltage. This guarantees the smooth operation of halogen lighting systems.