ElectricalDesign release 17.2.2

25.5.2017

New switchgear materials and new cables have just been added in ElectricalDesign.

3P+N RCBO library

3P+N RCBO library

3P+N RCBOs combine in a single device of only four modules width the protection against overcurrents (overload and short circuit) and earth fault currents.

The range includes AC, A, APR or S versions, with sensitivity levels of 30, 100 or 300 mA and intervention curves B, C or K.

The 3P+N residual current circuit breakers with overcurrent protection has been developed with the aim of meeting requirements such as the protection and safety of people, equipment or facilities, offering a compact solution in 4 modules.
3P+N RCBOs are ideal for the protection of three-phase distribution circuits in commercial facilities, but also of equipment and industrial sockets.
3P+N RCBOs are the ideal solution for new installations, ensuring space saving in switchboards, as well as in retrofitting of existing plants, by adding earth fault current protection in installations where it wasn’t foreseen, without any impact on the overall dimensions of the system and on the placing of the existing devices.

Application of RCBO

Application of RCBO

Solar cables

Solar cables

A solar cable is the interconnection cable used in photovoltaic power generation. Solar cables interconnect solar panels and other electrical components of a photovoltaic system. Solar cables are designed to be UV resistant and weather resistant. They can be used within a large temperature range and are generally laid outside.[1]

Features

One common factor for most of the photovoltaic power systems is outdoor use, characterized by high temperatures and high UV radiation. Single-core cables with a maximum permissible DC voltage of 1.8 kV Umax. The phase to ground DC voltage rating must be Uo1.5kVDC and a temperature range from -40 °C to +90 °C ambient, 120 °C on the conductor for 25 year service life against thermal ageing. Ambient temperature and conductor temperature is derived from the Arrhenius law for ageing of polymers - ageing of polymers doubles for every 10 °C rise.[1]

DC string cables must be class II double insulated to protect against short circuits and ground faults.[1]

Insulation

The cable's insulation must be able to withstand thermal and mechanical loads. As a consequence, plastics which have been cross-linked are increasingly used today. The insulation and jacket materials are extremely resistant to weathering, UV-radiation and abrasion. Additionally, it is salt water resistant and resistant to acids and alkaline solutions. It is suitable for fixed installation as well as for moving applications without tensile load. It is especially designed for outdoor use, which means direct sun radiation and air humidity, but due to the halogen free flame retardant cross-linked jacket material the cable can also be installed in dry and humid conditions indoors.[1]

Single core cables for PV systems FG21M21

Single core cables for PV systems FG21M21

The Single core cables for PV systems FG21M21 specifications are: