What is low voltage and where are low voltage switchgear used?
Generally, voltages below 1 kV (or 1.5 kV for DC) are referred to as low voltage. Households and other small consumers are generally limited to a low voltage of 230 V in Germany. While long-distance distribution uses high voltage, local distribution networks and home systems rely on what is known as low voltage. All devices that you operate in your home are powered by low voltage and are fused, controlled or measured by means of low-voltage switchgear.
What is meant by low-voltage switchgear combinations?
Switchgear and control gear play an important role in power distribution. They are used in industry, in domestic installations, on construction sites or in charging stations for electric vehicles. A low-voltage switchgear and controlgear combination consists of one or more low-voltage switchgear and controlgear with appropriate equipment for control, regulation, measurement, signalling and protection systems. The SN EN 61439 standard specifies the safety requirements for such systems. It supports planners, system builders, electrical installers and end customers in complying with safety requirements. The aim is to ensure the protection of people and equipment. This standard applies to power distribution systems, switchgear and controlgear, meters, and control panels in residential and commercial buildings. It also specifies requirements for on-site power distribution boards and cable distribution cabinets as well as switchgear combinations for special areas.